Loading...
The URL can be used to link to this page
Your browser does not support the video tag.
51 BEACH AVE RES19-0058 CEDAR SHINGLE
r 3 , L) 0..rt r Abv JOB COPY New Roof Construction s Cedar Shake 8 MANUAL Shingle Bureau • - II II ` NI II II I. II iI kz. � Mr mom :-L.----. tiff 3 9 At FW ". -47"-74:*t.: -- -- _ p.i. ,.: ,,,t1.1„.„ „...„. ,,,:, _ ______ ...„4..„,75....4.. .‘ 1. .. . ...„...a„t.......L..„, , . .v...„......„„. . _ ........ • _, _ .,,,,. : , • ,..„. ._ ... ,.... •..„., , . ,., . .",,.:14:,,..4...::.„...:. .„...::... . 1 -...- -::'I . . • i : 1 . m - .-1-1--; ' ' ` E kf z Er 4--,-,: i t ,/ C ' { i INTRODUCTION New Roof Construction Manual Certi-labeF Products This manual is intended for use with Western Cedar shakes and shingles manufactured by CONTENTS Red Cedar and Alaskan Yellow Cedar shake members of the Cedar Shake&Shingle and shingle application only. Western Red Bureau,("CSSB")are the only products Certi-label®Products pages 1-2 Cedar and Yellow Cedar products labeled with the"Certi"brand name. manufactured by CSSB members are labeled Certi-label®cedar shakes and shingles are General Design& with the"Certi"brand name.The species is made by experienced craftsmen who take Application Details pages 3-5 indicated by either"Yellow/'or"Red"Cedar at pride in their trade and the quality of their the top of the label.For ease of reference this product.Despite their varying sizes and Mansard Roof Details page 6 manual refers to"Certi-label®Western Cedar" sometimes remote locations,member mills and the term is understood to include both are bound together by a rigid quality code. Low Slope Roof Details page 7 Western Red Cedar and Alaskan Yellow Cedar Unannounced independent inspections products manufactured by CSSB members conducted by accredited third party agencies Hip&Ridge Details page 7 Material for this manual has been compiled ensure that product quality is maintained. from various authoritative sources,and many Products are inspected to conform with Roof Juncture Details pages 8-9 of the construction methods shown herein various local,national and international codes have been developed by the shake and shingle and standards(contact the CSSB for specific Roof Valley specialists in both the United States and details). Flashing Details pages 9-10 Canada.The design and application details Each bundle ofroduct has the mill's and methods of construction reflect current p Roof Projection distinctive Certi-label'®tucked under the Flashing Details page 11 good building practice.Other options are bundle strap.Asking for"the Blue Label®"or possible but ensure that you check with your "number one blue label"is not specific Roof Fastener local code jurisdiction for approval. enough:CSSB members'products are the only Guidelines page 12 The information in this manual is ones with the Certi brand name on the label. not intended to supercede local Ventilation Details pages 13-14 building codes. Please Note:ONLY experienced professionals who follow proper safety and workmanship Specialty Roof Cedar Shake&Shingle Bureau' practices should implement the information History contained herein. Deck Details pages 15-16 On June 9,1915,at a meeting of the Trustees Note:This manual replaces all previous Cold Roof System of the West Coast Lumber Manufacturers versions of the"Cedar Shake and Shingle Details pages 17-18 Association,it was agreed to establish a Bureau Design and Application Manual branch of the association to serve thosefor New Roof Construction." High Humidity members who manufactured shingles.Our Area Details page 19 influence grew,and as we survived both the Great Depression and World War II, Coverage& manufacturers continued their quality Exposure Tables page 20 commitment In 1963 the organization merged with the Handsplit Shake Bureau to become Care&Maintenance the Red Cedar Shingle&Handsplit Overview pages 21-22 Shake Bureau. Manufacturers'product lines continued to Specification Guidelines pages 23-24 broaden and,in 1988,the members changed the organization's name to the Cedar Shake& How to Read a page 25 Shingle Bureau®.In the late 1980s,mill Certi-label® quality control inspections were subcontracted to independent,third party quality control agencies. Each year the Cedar Shake&Shingle Bureau®'s staff answer thousands of technical questions and product selection queries.Our proud history,quality reputation and dedicated members provide excellent cover House Photo: Architect:Shope Reno Certi-label®cedar shake and shingle roofing Photo:Robert Benson Wharton and siding products. cover Product Photo:John Gordon CERTI-LABEL`°' PRODUCTS CERTI-LABEL° CEDAR SHAKES Certi-Split" Handsplit Shakes These shakes have split faces and sawn backs.Cedar logs are first cut into CERTI-SPLIT desired lengths.Blanks or boards of proper thickness are split and then run PREMIUM GRADE diagonally through a bandsaw to produce two tapered shakes from each Nandcpl Red Cala Shakes blank.Available in Premium Grade(100%edge grain)or Number 1 Grade (Up to 200/a flat grain allowed in each bundle). Certi-Sawn" Tapersawn Shakes These shakes are sawn both sides.Premium and Number 1 Grades are the CERTI-SAWN most common.Premium Grade is 100%edge grain,100010 clear and 100% PREMIUM GRADE rape,,. a�eAarShakee heartwood.Number 1 Grade allows up to 20%flat grain in each bundle. Number 2 and 3 Grades are also available. Certi-Split' Tapersplit Produced by hand,using a sharp bladed steel froe and a mallet.The natural • - CERTI-SPLIT shingle-like taper is achieved by reversing the block,end-for-end,with each PREMIUM GRADE andGph aed Coda.Shakes split.Premium Grade only.(100%edge grain) Certi-Split' Straight-Split Produced by machine or in the same manner as tapersplit shakes except CERTI-SPLIT that by splitting from the same end of the block,the shakes acquire the PREMIUM GRADE Nand.p,;ned C::i,,shake, same thickness throughout.Premium Grade only.(100%edge grain) CERTIGRADE" CEDAR SHINGLES Number 1 Blue Label' The premium grade of shingles for roofs and sidewalls.These top-grade CERTIGRADE shingles are 100a/a heartwood, 100%clear and 100%edge grain.Available Red Cedar Shingles in 16"or 18"or 24"lengths. Number 2 Red Label CERTIGRADE A good grade for many applications.Not less than 10"clear on 16"shingles, 11"clear on 18"shingles and 16"clear on 24"shingles.Flat grain and Red Cedar shingles limited sapwood are permitted in this grade. Number 3 Black Label A utility grade for economy applications and secondary buildings.Not less CER_ than 6"clear on 16"and 18"shingles,10"clear on 24"shingles. Red Cee ei,R$binglee .r1.a cito. n.a n,ao.e:Mal;OWII Number 4 Undercoursing 41W A utility grade for undercoursing of double coursed sidewalls only.Not a roofing material and not to be used as a starter course for roofs. 2 CERTI-LABEL® PRODUCTS CERTI-GUARD® Pressure-Impregnated Treated Products PRESSURE-7REATEDFlRE-RETARDANT SHAM&SHINGLES Certi-label®products can also be treated.Products are available either CEDAR SHAKE A SHINGLE BUREAU fire-retardant-treated OR preservative-treated.Special care must be taken to follow the treatment company's recommended installation instructions. Certi-Guard` Fire-Retardant Treated Cedar Shakes and Shingles CERTI-GUARD® Premium and Number 1 Grades of Certi-Split®shakes,Certi-Sawn®shakes, PREE SHAKES g BUREAUand Number 1 Grades of Certigrade®shingles are available pressure- impregnated with fire retardants.Certi-Guard®products may be used for Class A,B and C roof systems.Contact the treatment company for treatment warranty information,accessory product requirements(including recommended fastener types)and application details for treated cedar material.Local code jurisdictions have additional information regarding applications in specific areas. Certi-Last` Preservative-Treated Cedar Shakes and Shingles Premium and Number 1 Grades of Certi-Split®shakes,Certi-Sawn®shakes, CERTI AILT® and Number 1 Grades of Certigrade®shingles are available preservative- treated by pressure processes.This product is ideal in areas of high humidity. PRESERYATIYETRGTEDcuJ MMUS MA SHAKE i SHOW HUM Specify the Certi-Last®treating label for this extra protection.Contact the treatment company for treatment warranty information,accessory product requirements(including recommended fastener types)and application details for treated cedar material. Note:Cedar's natural color varies as shown in these examples,yet without applying a paint or stain it will all weather to a beautiful gray. Roof Application Quick x , ' , -- = ;/� � �Reference Guide `_��} �w,�� 7.,...1:—"" !- 1 •Be sure that felt interlay paper on .}04:4-.y �% f/ shakes does not extend below a line ,. _ - that is twice the exposure above the . .��' • x',..„.„,----.„1._„-`` ."-= ,;% . butt(i.e.a 24"shake at 10", A¢ ;-7 kaa ".;Ki• - exposure would have felt applied 20 ..�, above the butt). fi - `` �--- x •Never interlay shingles with felt. u - '__ .•� - r. Via. ,.. •• �- . E� – •Keyways must not be aligned and - }:—1 y w■m _ ""; must be a minimum 1 1/2"offset .}��` 4 `'� ''''"° I T from the course above. •DO NOT drive nail heads or staple t + --r Y f • •,,a, .�— -- crowns below wood surface. •Overdriving or underdriving the T r—^�rI a 3 'zJiie " ..v.•3 fasteners can seriously damage the _ -! --.;.-_-_-..)-i-4,,=r. m - -- . - —T integrity of your roofing system. = . r.' , �'�..r • - ` * y,, v.ta:Y yY- 8�'SP,.:'. Y 'K.' .e` -"Aw7 Photo:Celia Pearson GENERAL DESIGN AND APPLICATION DETAILS 3 Sheathing Shakes and shingles may be applied over Certi-label®shakes spaced sheathing.Spaced sheathing is usually Product should project 1 1/2" i S/ paced sheathing beyond the fascia and 1 x 4 or 1 x 6 softwood boards and shall not approximately 1" be less than 1 x 4 boards. over the gable �� Solid sheathing is recommended for shakes or rake end '�� `� j and maybe required in seismic regions or 11%‘. Solid under treated shakes and shingles.Solid < �_. g . . sheathing is used In areas with wind-driven `_ snow.Please note that the only solid sheet Gutter . = Solid sheathing at eave sheathing tested with Certi-label®shakes and Rafter Fascia____ r'N� shingles is plywood.Check with your local �< Eave protection building official for plywood Rafter header__% t (extend to rake edge) thickness/dimensions.Eave protection is used on the edge where 36"felt underlay is used Figure 1:Spaced Sheathing and should extend up at least 24"beyond the For applications using varied exposures,the center of the exterior wall but it is not meant to cover the sheathing board should be equal to the distance of the exposure. entire roof. Staggered Butt Applications Certi-label®shakes Staggered butt applications are made by . Product should project 1 1/2" Solid sheathin shortening the exposure less than the greater beyond the fascia and I Y iit .f / g maximum exposure.No shakes or shingles approximately 1" .-'>" shall be applied greater than the maximum over the gable exposure allowed.Check with local building or rake ends,: ' . codes for approval of this installation method. • .,\ Note:Do not cover the entire deck with Note:in areas of high humidity, non-permeable barrier(including non- Gutter nailing strips ora continuous permeable underlayment).See CSSB Fascia NANO \Rafter ventilation product may be technical bulletin"Asphalt-Saturated Rafter header Z Eave protection used,or Certi-Last treated Organic Felt". (extend to rake edge) shakes may be applied directly to the deck. Figure 2:Solid Sheathing __2 x 4 spacers 1x4or1x6 Cert-labelt shingles —4� nailing strips Product should project 1 1/2" v`�� /Solid sheathing beyond the fascia and �`4j approximately 1" � / 00 ` over the gable_ ,I.�I� ��� `��: or rake end ♦�\ \ ._ .e,- \.�s `'., ISI Gutter Fascia �" 0 _Solid sheathing at eave I.' Rafter header ('� Eave protection (extend to rake edge) Rafter Figure 3:Spaced Over Solid Combination Sheathing This is the preferred system for shingle application,in areas with high humidity or where additional ventilation is required.When using Certi-Last®products,they may be applied directly to the deck. 4 GENERAL DESIGN AND APPLICATION DETAILS Certi-label Shakes A solid deck is recommended in seismic The bottom edge of the felt should be positioned above the butt of the shake at a distance equal to activity,hurricane and tornado regions and in Two nails(only)for each twice the weather exposure.Never interlay shingles areas where wind-driven snow is encountered. shake approximately 3/4"from with felt. Roofing felt system interlay between the shake edge and approximately 1 1/2" above exposure line..-----.. -- ` / / courses is required whether the sheathing is Space shakes 3/8" / spaced or solid.The felt interlay acts as a to 5/8"apart baffle that prevents wind-driven snow or other -� foreign material from entering the attic cavity Exposure ✓�,40-44,-.,,- during f ! ! o •oand approximately 1"over the gable or rake end/ Plywood sheathing application,the sheathing is usually 1 x 6 Adjacent course joints_ j - -N__Eave protection(extend to rake edge) should be offset N boards spaced on centers equal to the 1 1/2"minimum y'� Starter course weather exposure,(Table 4,Page 20)at which the shakes are to be laid-but never more Gutter_ _ Rafter header Rafter than 7 1/2"for 18"shakes and 10"for 24" Fascia shakes on roof installations.When 1 x Figure 4:Certi-label Shake Application spaced sheathing is installed at 10"on center, additional 1 x 4 boards must be installed(i.e. maximum allowable spacing is approximately 3 1/2"measured from edge to edge between the sheathing boards).Please note that the your area).The bottom edge of the felt 6.Straight-split shakes should be laid with the only solid sheet sheathing tested with should be positioned above the butt of the froe-end(the end from which the shake has Certi-label"shakes&shingles is plywood. shake at a distance equal to twice the been split and which is smoother)towards Check with your local building official for weather exposure.For example,24"shakes, the ridge. plywood thickness/dimensions. felt extends up 14"onto the sheathing Notes:See page 19 for high humidity areas. Special care should be taken when installing forcing water to the surface. the felt interlays over spaced sheathing to 4.Spacing between adjacent shakes should be Currently the only acceptable solid ensure that an effective baffle is formed a minimum of 3/8"and a maximum of 5/8". sheathing product tested for use with (Figure 1).The felt should be applied over the 5.Shakes shall be laid with a side lap of not Certi-labelR shakes is plywood. top portion of the shakes and extend on to the less than 1 1/2"between joints in adjacent spaced sheathing so that the bottom edge of courses. the felt is positioned at a distance above the butt equal to twice the weather exposure. Certi-label%Shake Application Shakes,like shingles,are normally applied in straight,single courses.The following application details(Figure 4)must be observed. ci '}. ,: 1.The starter course may be one or two layers 11i II II of cedar shingles or shakes overlaid with the desired shake.A 15"shake is made �" .:.. expressly for starter and finish courses. 2.Butts of first course shakes should project �ti sa - 'i1.`* 1 1/2"beyond the fascia and approximately i"H grim 11.111/11 - 1"over the gable or rake end. _ - t-• ■tett k-vIii min u-,1--..4-e,,,„-` 3.The CSSB recommends using an 18"wide ,. 1 ' ° `" s, '°` - +; :: r min strip of No.30 ASTM D226 Type II or No.30 . ,' ,t, t;,N i 7,...."1..,,- ASTM D4869 Type IV roofing felt laid over —.. '4.-‘t!":7,1-';„..,, z' _ ,�•=�r� ` " - the top portion of shakes and extending on Q4-. { - to the sheathing.(Check with your local .. building official for exact specifications in Architect.Shope Reno Wharton,Photo:Robert Benson GENERAL DESIGN AND APPLICATION DETAILS s Certi-labele Shingles For 4:12 slope and steeper,use Number 1 Grade shingles at 5", Two nails(only)for each There are two acceptable methods for 5 1/2"and 7 1/2"exposures for shingle approximately 3/4"from application of spaced sheathing:One is to 16",18"and 24"shingles edge and approximately 1 1/2" space 1 x 4 boards to coincide with the respectively.For lower roof above exposure line. slopes and lower product weather exposure(Table 2,Page 20)of the grades use reduced exposures I Spaced sheathing should shingles(Figure 5).Thus,if the shingles are to (See Page 20) be 1 x 4 or 1 x 6 be laid at 5 1/2"to the weather,the sheathing Space shingles boards would also be spaced at 5 1/2"on i 1/4"-3/8"apart center.In this method of application each –,b..4,%,.. �` shingle is nailed to the center of the 1 x 4 - �® board.With 7 1/2"weather exposures,the ���♦��♦ ♦ center of the sheathing board shall equal the �� . distance of the weather exposure. Alternate course N. \- y ___,. Alternatively,although not commonlyused,a joints should Y g not align �� #' permeable underlayment(i.e.breathable), Adjacent course joints # ` __Solid wood sheathing such as roofing felt,may be applied over should be offset I either solid or spaced sheathing. 1 1/2"minimum N \�` p g Gutter —_ t Eave protection(extend to rake edge) Product should project__-_ . R ---First course doubled or tripled Please note that the only solid sheathing 1 1/2"beyond the fascia Fascia Rafter \ __._Rafter product tested for use with Certi-label® and approximately 1" header shakes and shingles is plywood.Check with over the gable or rake end your local building official for plywood thickness/dimensions. Figure 5:Certi-IabelK Shingle Application Certi-label"Shingle Application Regardless of style,the following basic application details(Figure 5)must be Centerline of heart observed. 11 l'j 1.Shingles must be doubled or tripled at all I' °1 eaves. 1 1/2" 11 1,,,1.1 2.Butts of first course shingles should project 1 ri'lf 1 1/2"beyond the fascia and approximatelyKnot or ] 1"over the gable or rake end. similar defect .. j� _ 3.Spacing between adjacent shingles(joints) �1+ i should be a minimum of 1/4"and a Figure 5a:Course Alignment maximum of 3/8". 4.Certi-label shingles shall be laid with a side - lap not less than 1 1/2"between joints in adjacent courses,and not more than 100/0 ,-. shall be in direct alignment in alternate E courses.Check with your local buildingv`' official in your area. .11K5.In lesser grade shingles(Figure 5a) _ - containing both flat and vertical grain,joints should not be aligned with centerline of "11 - ti,. _ --_ heart. r 4 . 6.Flat grain shingles wider than 8"should be split in two before nailing.Knots and similar defects should be treated as the edge of the shingle and the joint in the course above — ,- placed 1 1/2"from the edge of the defect -- e - • Architect Gaylord Grainger,Libby O'Brien-Smith Architects,Photo:Eduardo Calderon 6 MANSARD ROOF DETAILS The mansard is particularly well suited to renovation work on pitched roof houses because the upper story can be enlarged The bottom edge of the felt should be without adding extra height to the structure. positioned above the butt of the shake at a distance equal to .1/ The low downward slope of the mansard roof twice the weather exposure. line acts visually to reduce the scale of a Never interlay shingles with fe4 4010 lt. building and helps to eliminate a boxy Two nails(only)for each appearance.This technique is used frequently shake approximately 3/4•from on large commercial projects,particularly edge and approximately t 1/2" _-..- those near residential neighborhoods.It is above exposure line.\ ; also a common solution to the problem of :. avoiding a monotonous appearance on flat- /// roofed frame apartment buildings. Certi-label shakes / Plywood Sheathing Properly used,a mansard roof can strengthen '0-' the design without substantially increasing Space shakes 3/8" i�``J / construction costs.If raised up above the level to 5/8"apart --- '��� of a built-up roof the mansard can screen out 'c / roof penetrations or mechanical equipment. The variety of mansard roofs is practically - // infinite.One of the most widely used(and misused)roof designs,its proportions and / ���1 scale are very important and care should be Product should project taken to avoid a mansard roof line that is 1 1/2"beyond the fascia and approximately 1" either too skimpy or too generous. over the gable or rake end Eave protection Two of the most widely used roofing materials min.36" on the mansard roof are Certi-label®cedar shakes and shingles.Cedar shakes,with their Figure 6:Mansard Roof heavier texture and solid appearance,are perhaps more frequently specified for mansards although shingles are also used, particularly when a lighter scale is desired. The light weight and ease of application of Certi-label shakes and shingles contribute substantially to economical construction. Construction details for typical mansard roofs are shown in Figure 6. .:',"N‘ r 1 x 3 t dt Photo:Murray Levin LOW SLOPE ROOF DETAILS, HIP AND RIDGE DETAILS 7 The minimum roof slope on which Certi-label®shakes are recommended is 4:12 and for Certi-label shingles,3:12.It is possible,however,to apply Certi-label shakes 18"tett interlay___ - or shingles successfully to solid sheathed roofs of lower slope providing a special 2 nails per shake__ method of application is followed(such as 24^ \ a'overlap of felt/ 2 x 4 spacers Certi-label shakes Figure 7),however shingles must be applied at 10"exposure_ ��•� i 1 x 4 or 1 x 6 at a reduced exposure(page 20).Never `I _nailing strips Product should project ---i17,-... M1%,..'' interlayshingles with felt.Theprescribed ' g1 1/2"beyond the fascia 1� t ' method provides a double roof on which the and approximately 1•over �- rte!: �� �Ii Certi-label shakes or shingles area lied to a the gable or rake end G'` ,� =�� lattice-like framework embedded in a �`+" bituminous surface coating. \ � ••,, ,+i- � � A hot mop or similar approved membrane Gutter <-6e...,e.--,-. • � Hot mop or similar \`' %� approvedmembrane. should be applied over the roof deck.Consult I.- Shake starter course__; ` �" Consult your local your local building official for approved of' 4/P,,' '11\ olid building official products in your area.With the final hot-mop 36"felt underlaySolid sheathing for approved products application 2 x 4 spacers of Western Red Fascia � sheathing at eave in your area. Cedar or preservative treated lumber are Rafter header!Rafter_, embedded in the bituminous coating.These spacers are installed over the rafters and extend from eave to ridge.Check with your Figure 7:Certi-label` Shake Application to Low Slope Roofs local building official for their preference in your area. Note: Next,1 x 4 or 1 x 6 nailing strips,spaced •When utilizing a non-permeable barrier(including non-permeable according to the weather exposure selected underlayment)over the entire roof deck/sheathing system,consult for the Certi-label shakes or shingles,should a Building Envelope Specialist. be nailed across the spacers to form a lattice- •If installing shakes or shingles on roofs having less than 3:12 roof like nailing base.For example,if 24"shakes slope,check with your local Building Official for approval. are to be installed at a weather exposure of 10",the nailing strips would also be spaced at 10"on centers.When 1 x 4 spaced sheathing is installed at 10"on center,additional 1 x 4 boards must be installed. Finally,the Certi-label shakes or shingles are Alternate applied in the normal manner with a starter �. /Cut back edge of shingle or shakes on bevel course at the eave and felt interlay between overlap41fJoin nee material with /;' g type 304 or 316 stainless steel fasteners each course of shakes(Figure 7). �,r ,t— See page 12 for fastener details ,P„4,.f Certi-label Hip And Ridge Details �a ' Intersecting roof surfaces at hips and ridges 4/41 �,,,\ should be capped to ensure a weather-tight joint.Site made or factoryassembled hip and 7.......* �/ridge units may be used,but both types must ,, '��/„/ have alternate overlaps and concealed p nailing Z ��` \ Notched (Figure When ridge cap and field product are the same length and grade,the weather '”""� ��,` 04 exposure of the ridge cap should be the same i `. • exposure as the field product of the roof. '6�� v Nails must be longer than those used on the " �� field of the roof and of sufficient length to - .�.�"�'��� \ penetrate 3/4"into or completely through the % ��— Notch first piece of starter course Position fasteners sheathing.Position fasteners approximately approximately 2' `.Double starter course 2"above exposure line.Install a strip of felt, above exposure line ; eave protection material or metal over hip or Choose material of uniform width between 4"and 5" (if making units with field material) ridge under the ridge or hip cap.If longer or shorter ridge cap is used,adjust exposure R accordingly. Figure 8:Certi-label Hip and Ridge Application • 8 ROOF JUNCTURE DETAILS Correct construction of roof junctures and Double or triple starter course slope transitions is vital to ensure the integrity Product should project ��►� of the roof system.In the following cases, 1 1/2"bEaer your local building official for minimum ke end i/'j gauge/thickness requirement.It should be Wood molding painted on both sides with a good metal or 4I bituminous paint.Flashing materials should Metal flashing_ be painted after bending to maintain the Sheathing ''r 0 integrity of the coating. Convex Juncture Figure 9:Convex Roof Juncture On this type of juncture(Figure 9)metal flashings should be installed to cover the top 4"of the wall and the bottom 8"of the roof slope before the final course of Certi-label shakes or shingles is nailed to the top of the Interwoven felt " \ Steeper slope roof wall.A strip of wood molding can be applied for shakes only after final wall course is installed.A double or ilk"— _ triple starter course is then applied at the 36°starter felt eave,with a 1 1/2"overhang over the outside ----- Double starter course wall trim.The roof can then be completed in /�r o the normal manner. .1 Metal flashing -p,%+ '" _Lower slope roof Concave Juncture 6"up-6"below �� Metal flashings for the concave juncture are ,111 similar to those for the convextype.They0.�®', Solid sheathing _ . should be installed to cover the top of the roof slope and the bottom 4"of the O. Product should project wall before the final course of Certi-label 1 beyond the fascia and � _ approximately 1"over shakes or shingles is installed.The final roof the gable or rake end course should be installed so that the tips fit as snugly as possible against the wall at the Figure 10 Low Slope to Steep Slope Roof juncture.A double starter course should be Transition Detail-Certi-label"shakes applied at the start of the wall surface and the (Centigrade®shingle application is similar but without felt interlay) remaining wall courses applied in the recommended manner.If nails are not acceptable through exposed metal,metal clips can be used to hold down the flashing. y Roof Transitions ' Roof transitions(Figure 10)requiret ,�r • s _�`"" appropriate flashing,felt and product application.Changes in roof slope should be y-ii/ " detailed in a similar manner as concave / * w junctures,to ensure the integrity of the roof system.Solid sheathing is required above and - - -- below the change in slope,metal flashing is -- - required across the change in slope,and a 36" strip of starter felt is required on the upper — - slope,installed in the same fashion as at the ® iii — eaves. *'1 1 eI M omit Courtesy:Western Wood Products,Photo:John Spaulding ROOF JUNCTURE DETAILS 9 Apex Juncture On this roof juncture(Figure 11)metal flashing should cover the top 8"of the roof Ridge cap and the top 4"of the wall.It should be - __ installed before the final course of -----_a :51' Certi-label®shakes or shingles is applied to • the wall.The recommended sequence of Last course I� Metal For excessive sweep application is to apply Certi-label shakes or over flashing_ �\ shingles may be shingles first to the wall then to the roof.The ,,,,J I� flashing steam bent__. 4-i overhanging roof material is then trimmed I flush with the wall.Finally,specially prepared I 141.1i. -�ridge units are applied over the wall-roof Sheathingr! 1 `' ��juncture so that in each matching pair the .—. II0��% roof piece overlaps the wall piece each time. j' I� Double eave protection Swept or Bell Eave ili When Certi-label shakes or shingles are to be applied to a swept or bell eave where the Figure 11:Apex Roof Juncture Figure 12 Swept or Bell Eave curvature is excessive,it may be necessary to soak them for a period(usually overnight)or steam them prior to installation.A double starter course is employed in the usual Note:For unusual roof applications contact manner.Exposure is determined by the slope the Cedar Shake&Shingle Bureau for a list of of the roof and the type of Certi-label shake or members who can assist you with specific shingle selected.At lower pitches waterproof questions. eave protection should be used. ROOF VALLEY FLASHING DETAILS Roof Valley Flashing Detail Most roof leaks can occur where water is that have proven their reliability under the channelled off the roof or where the roof specific conditions to be encountered.It is abuts a vertical wall or chimney.At these important that metal flashing have the same points,metal valleys and flashings are used to longevity as Western Red Cedar.Check with assist the Certi-label®shakes and shingles in your local building official for their preference keeping the structure sound and dry. in your area. Structural members that join a roof should Valley felt also be flashed at all intersecting angles to Use minimum nails to hold I prevent leakage.Step flashing should extend metal in place I w valley metal under the Certi-label shakes and shingles,up \ \ `1 // the vertical surface,(one flashing installed on �e►� each course concealed under the covering Eave felt should be ����� course)and should be covered bya second lapped over the valley \ -`_•� — �ft=�7 jointf o give 3 level _� layer of flashing(counter-flashing). of eave protection. � ��� Flashing should be pre-painted both sides , 411111%4711P (valley felt,eave felt i. using a good metal or bituminous paint and metal) i `� Eave protection (extend to rake edge) (Figure 13a).Flashing strips which must be Valley metal 8,0„long. j `�` Open valley width 4"to 8" bent to sharp angles should be painted after overlapped 6°at joints! % �� depending on water volume. bending.Metal flashing with baked on enamel painted both sides / j� Mark anticipated water lines coating is available in some areas. Roofing felt �`, `� (width of open valley)on valley Metal to extend as far as \ sides with a chalk line. Different flashing metals are available in shakes or shingles Solid sheathing at eave different areas depending on climatic variations.It is good practice to use metals Figure 13a:Valley Metal 10 ROOF VALLEY FLASHING DETAILS Valleys: Certi-label" Shingles — 36"valley felt(left side) For roofs with slopes of 12:12 or greater,valley A A flashing should extend not less than 8"on 1/2"folded �.� �y W valley metal lapped u� —� at ridge(2"lap) each side of the valley centerline.For roof back mm + yo 36"valley felt(right side) slopes less than 12:12,flashing should extend W valley metal laws ,'� not less than 11"each side.Valley metal �'a; ippg, '' should be underlayed with No.30 ASTM D226 1 Type II or No.30 ASTM D4869 Type IV roofing felt Shingles should not be applied with their grain parallel to the valley centerline and those 014",040pr extending into the valley should be cut at the correct angle(Figure 13b). Figure 13b:Typical Saddle Flashing Detail a Keep nails well away from Valleys:Certi-label Shakes the center of valley On shake roofs,it is recommended that a strip © p / Hidden felt of No.30 ASTM D226 Type II or No.30 ASTM \ I . D4869 Type IV roofing felt be installed over the � � � ` ,. sheathing and under the metal valley.Metal 4 valleys should be center-crimped,painted, A; .' 7 galvanized steel or aluminum and should extend not less than 11"on each side of the \ --" valley centerline.In some areas,however, Wit*, ON I t� flashing width requirements may differ and `- '•,r''► local building codes should be consulted. 1140p. , Shakes should not be applied with their grain i i parallel to the valley centerline and those � �� extending into the valley should be cut at the !! correct angle(Figure 13c). ;i Note:Check with your local building official Figure 13c:Valley Product Application I for minimum gauge/thickness requirement Order of applying Certi-label 2.Place pre-cut valley piece so 3.Select product of the shakes or shingles at valley: that cut-angle is positioned required width to complete on the valley guide chalk line the course of Certi-label 1.Stop course line here with tip on the course line. shakes or shingles. W valley metal 1/2"crimp ...11 ... :1...4'.... ..P. 41111.7:1 \ a '"`,......., �""...s"'� •4l Figure 13d: —.. oes. •,„�.�+^'"�� Roof Valley Flashing Detail R �►..� Figures 13a-13d:Flashing Details �`■wr,,,� ,-------- for Shake and Shingle Valleys Courtesy:Western Wood Products,Photo:John Spaulding ROOF PROJECTION FLASHING DETAILS »I Top,head,saddle, Step flashing interwoven pan or cricket flashing with each course �'� Counter ® �_.flashing .,. I 141076.- /I I I 0 4*. Step flashing 3"laps Cert-label / ��� Bottom apron Bottom apron product ���� \ flashing flashing Figure 14a:Skylight Flashing Figure 14b:Skylight Installation Certi-label product 3"minimum 6"minimum a Typical chimney flashing Bottom or � not requiring soldering .�,1 l / P" Apron flashing Head flashing Step flashing 3" /r � minimum overlap i ,�� Recommended step flashing width Caulking Shakes Shingles ���;� Caulking Horizontal width 4" 2 1/2" \\\ /� .110",..„------ Vertical � Vertical width 3" 2 1/2" �� // \.'. � 3. Typical chimney Note:Check with your local building 6" flashing requiring official for minimum gauge/thickness soldering requirement. older joints Figure 14c:Typical Projection Flashing 1"minimum clearance Certi-label shake around projection or shingle joint -414 Nails should not �` penetrate flashingeN`��' 1� flange underneath W4170 41 1 I P.- 441011000triipo, - Keep edge of flange minimum 2"from � ® \ edge of Certi-label shake or shingle joint Counter flashing Jack f11 Figure 14d:Typical Projection Flashing Plumbing stack II Figure 14e:Typical Projection Flashing — 1111 Figures 14a-14e: Flashing Details for Typical Roof Projections 12 ROOF FASTENER GUIDELINES Nails Each Certi-label®shake or shingle shall be Do not use electro galvanized(EG)fasteners. applied with two fasteners.Nails must be stainless steel Type 316 in locations within fifteen(15)miles of salt water.For locations outside the salt water zone-nails must be stainless steel,Type 304,Type 316,or hot- dipped galvanized with a coating weight of ASTM A 153 Class D(1.0 oz/ft2).Stainless steel nails offer the highest degree of corrosion resistance.Some nail manufacturers offer nails specifically for wood shake or shingle roof application.Contact the nail manufacturer for further information to ensure the fasteners used comply with listed 7 requirements and are correct for your V r application. YES NO NO Staples Correct-flush with surface Underdriven Overdriven The Cedar Shake&Shingle Bureau R prefers the use of nails,however if you choose to use staples they must be stainless steel Type 316 Location/Penetration Important Notes: in locations within fifteen(15)miles of salt Fasteners,two(2)per shake or shingle,shall Underdriving or overdriving any fastener water.For locations outside of the salt water be applied approximately 3/4"from the edge will affect the integrity of the roofing zone stainless steel Type 304 or Type 316 and approximately 1 1/2"above the exposure system.Fasteners utilized must be specific must be used.Each Certi-label shake or line.Fasteners shall be long enough to for use with wood shakes and shingles to shingle shall be applied with two(2)staples. penetrate into the sheathing at least 3/4"or prevent splitting and other weakening Staples must be 16 gauge with crowns 7/16" all the way through.Minimum nail lengths factors.Do not use electro-galvanized minimum horizontal,maximum 3/4" are shown in the fastener chart.Nails and (EG)fasteners.Ensure the fasteners used horizontal to the Certi-label shake or shingle staples must be driven flush with the surface comply with listed requirements. butt. of the Certi-label shake or shingle. Overdriving the fastener can split and/or Pressure Impregnated Treated Shakes distort the Certi-label shake or shingle. and Shingles Fasteners used with fire-retardant-treated (Certi-Guard®)and preservative-treated Fasteners (Certi-Last®)shakes or shingles must be stainless steel Type 316.For specifics on Type of Certi-labelA Nail Type and installation,accessory building materials Shake or Shingle Minimum length (flashing,etc),finishes and maintenance x please contact the treatment company Certi-Split &Certi-Sawn Shakes Type(in) directly. 18"Straight-Split 5d Box 1 3/4 www•cedarbureau.org/purchasing/treaters.asp 18"and 24" Handsplit and Resawn 6d Box 2 The information above is not intended to supersede local building codes. 24"Tapersplit 5d Box 1 3/4 18"and 24"Tapersawn 6d Box 2 Certigrad?Shingles Type(in) 16"and 18"Shingles 3d Box 1 1/4 24"Shingles 4d Box 1 1/2 Note:Longer fasteners of the same quality may be required for nailing ridge product VENTILATION DETAILS 13 a L Ventilation Guidelines Roof rafter or truss ter' ---_Ridge ventilation The importance of good attic ventilation beneath Il product the roof cannot be overemphasized.Such Certi-label shakes or shingles / t air ryo'' movement of air will prevent or inhibit (applied per specification) !] condensation of moisture on the undersurface of s'' i the Certi-label shakes or shingles,or on the ouvered roof decks.Vents should be provided at the soffits f•''. vent at eac (eaves)as well as at gable ends(screened to end of attic 111 thrill 11 1311111ttt 111111t11111t1t1111111tt1tt11t1111111111t1111111 prevent ingress of insects),on roof by using attic r10t111110011111111111 111111111111111111111101111.11011111111111111111roof ventilation or preferably the ridge lines with � cross-ventilation desirable.A rule of thumb for i�—,--1-11,�-' '_ —>Insulation adequate ventilation is that the ratio of total net I free ventilation area to the area of the attic should Continuous be not less than 1:150,with compensation made screened vent 2 for screens over vent apertures.In the case of a balanced system a 1 square foot per 300 square Figure 15a:Gable Roof With Attic feet of floor area may be adequate ventilation. Check with your local building department.Attic fans may be beneficial by supplying additional movement of air in attic spaces.Several roof ventilation construction techniques are shown in a Figures 15a-15c. � . �.� Any modification to the vapor barrier system or ;% i1 \ _ Ridge ventilation product addition of a vapor barrier system should only be ' i Certi-label shakes or shingles done after consulting with your local building Louvered vent a lied per specification) g at each end (pp official or a building envelope specialist.In some of attic G 4 areas,building envelope specialists are regulated ;� �/ v �` by government Please check with local building �; n n n un Hy 1 nt n►nnm ntnl►mn .� officials to see if there are professional . ,��,►�thutrh ► �; requirements in your area. Continuous t/ Roof rafter ,ii, ,� screened vent' q�iiioN\ / '1X iii \ Insulation €_ Air flow €' Air flow Figure 15b: Cathedral Ceiling With Partial Attic Certi-label shakes or shingles (applied per specification) ,i 4 Air flow ✓'4 \\\\' . vents each oofcreened :•'-.\`��\\\\\\�\��\� rafter space ''� \`\\\\\`��\V\\\\�\\• Rooi rafter Air flowulation =__ 2 Figure 15c:Shed Roof Figures 15a-15c:Ventilation Details 14 VENTILATION DETAILS Ridge Vents The amount of venting depends upon the size of the roof,roof design/structure,(attic present or not,etc.)as well as local climatic conditions. Check with your local building official for requirements in your area.One rule of thumb for venting the attic area is 1 square foot per 150 square feet of floor area.One half of this !� ��1���\� (1/2 square foot per 75 square feet of floor 'i� area)amount should be in the soffit or eave and one half(75 square feet)in the roof 0,,0 Certi-Ridgesystem.In the case of a balanced system 1 ��� rshake or shingle ridge square foot per 300 square feet of floor area \tii Ridge ventilation may be adequate ventilation.Check with your Roofing felt - �� ` product installed to I manufacturer's local building official. / � - specifications Low Sloe 6:12 Or less Caulking _ - II %-,,_ The \\ Felt folded back P ( ) The C558 recommends the installation of ridge <••••••••'"<°:''-' 46.Airflow ventilation product that allows for installation othrough ' pre-manufactured ridge applied over the vent ridge material.There are many manufacturers of this design. Figure 16:Ridge Ventilation Detail Steep Slope (8:12 or greater) On steep slope roofs,the correct ridge ventilation products can actually facilitate the ease of installation of Certi-label®ridge units. Always follow the manufacturer's installation instructions.The predominant ridge material manufactured today is for a low slope roof. However,by using a ridge ventilation product that is malleable and at least 8 1/2"wide,the material can be installed across the minimum 3"of air space at the ridge to create a shallowing of the slope at the ridge.Care must be taken to caulk the ridge ventilation material to the Certi-label shakes or shingles.Proper nailing of the ridge units will create a serviceable application. Severe Climate Areas In all wind driven snow areas,the proper ridge Y, ventilation product should have a screening effect to prevent snow infiltration(not louvered 17..'- *' j- : ''" or baffled). -- — .1,'"',, IL `F a �, ISI Architect:Gaylord Granger,Libby 0'Brien-Smith Architects,Photo:Eduardo Calderon SPECIALTY ROOF DECK DETAILS 15 Wood Deck Certi-label shakes or shingles Wood decks form an ideal base over which to ;' (applied per specification) Boards apply Certi-label®shakes or shingles,since Rigid insulation they can be attached in the conventional manner. Wooden deck Rigid insulation raises the issue of how to ,', Joist fasten Certi-label®shakes or shingles.Theuse of abnormally long nails driven throughthe Certigrade®shingles,the insulation and into the deck below is generally unsatisfactory.Horizontal strapping will be required toovercome the fastening difficulties(Figure 17).When strapping is used,fewer nails penetratethrough the insulation to the deck,and greater thermal efficiency is achieved by reducing the number of conductors.Inaddition,the lengths of the nails may be chosen to prevent the points from protruding through the deck where they may mar the inside face. If ice-damming is a potential problem or if reverse condensation is likely to occur,such Figure 17:Specialty Roof Deck-Strapping Over Insulation as may be encountered in an ice arena,a cold roof system should be used in conjunction with horizontal strapping,and ventilation must Certi-label shakes or shingles be provided at the eaves and at the peak.In (applied as per specification) buildings such as ski cabins that may be subjected to heavy snow loads,it is usually _ Vertical lumber member necessary to fasten wood members(typically Rigid insulation 2 x 4 on edge)from ridge to eave on the roof4'' Wooden deck deck and place the rigid insulation between. Strapping is then applied across the top of F 1OF P Joist these members,giving a ventilated air spaceang re 18).Fong om ditto onal of ails o tiro � (Figure 18).For additional details on cold roof systems please see page 17. The need for strapping can often be completely eliminated by the use of a false plywood deck,immediately over theinsulation,to which the Certi-label shakes or shingles are directly fastened(Figure 19).Exterior-grade sheathing panels are ideal for this purpose,since they provide a strong, Air space smooth surface.However,under certain conditions of slope and loading,there may be a tendency for the entire roof above the decking to creep downwards,bending the nail fastenings and compressing the insulation, Figure 18:Specialty Roof Deck-Vented Roof thereby reducing its efficiency.In such cases,it is often desirable to install the vertical Nails members as previously described. If the Certi-label®shakes or shingles are Product movement may cause a reduction in nailed directly through rigid insulation,a insulation efficiency.For this reason,the use number of problems may be encountered. of strapping or a false plywood deck is again For instance,the longer nails have thicker recommended. shanks which tend to split the Certi-label shakes or shingles. 16 SPECIALTY ROOF DECK DETAILS Rigid Insulation Numerous types of rigid insulation are now in use,and may be made from expanded polystyrene beads,rigid urethane laminate, low density fiberboard,or from fast-setting liquids poured on-site.They vary in thickness up to more than 2",as well as in length and Certi-label®shakes or shingles / (applied per specification) width depending upon the manufacturer.All Exterior panels these types are efficient insulators and are Rigid insulation usually of sufficient density to hold the weight of a normal roofing material without the need tb Wooden deck for lumber bridging.If you live in an area �II`//���tI Joist where snowfall is prevalent,please consult your local building official for snow load /40 requirements. /) �/ �} If shingles are applied over insulation and „• ` ventilation is required,nailing strips maybe applied under shingles(see Figure 23b on page19). For areas of high humidity Certi-Last' preservative treated product is recommended. / Figure 19:Specialty Roof Deck-Panels Over Insulation �: ,-'1:,-* yf 't-o X44,..,,+ For more technical • > information please contact i = f'' • - -J the CSSB office at -�.> a " ' Ilii rj4 1711 11/. ,n �,,. '•�'b iifl `.5 Tel: (604) 820-7700 ..-- Fax: (604) 820-0266 = nilMI 1$11 .i7--- i - 1t1Ii F. i/// 1. �..... III info@cedarbureau.com `, t S` www.cedarbureau.org III . , ,,- 4. rif ,it -, 4 — ',,,....___: , I. r r! A ', l 6i ; __ Brindisi and Yaroscak Custom Builders,Inc.Architect.George Dumitru COLD ROOF SYSTEM DETAILS 17 Certi-label®shakes and shingles are an excellent roofing material for cold weather areas that experience heavy snowfall and severe temperature extremes.Certi-label ., Ridge vent Certi-label shakes or shingles shakes and shingles offer the advantages of (applied per specification) ��A durability,superior wind resistance and good �0i� thermal and acoustical properties.As with �1'�' '.,- any other roofing material,however,their —`a `k�`��`'" best performance depends upon proper ,,��� �e�\\;\\��� / design,sound construction practice and ����Pv -\\‘‘,P\\ /� correct installation. `` In cold weather areas and particularly in `��1,\ mountain regions that experience very heavy I I _-• • __,_ snowfall,the cold roof-or vented roof Spaced vented space / % - Trim system-is recommended(Figures 20&21). sheathing / The principle of this system is to allow a Rafter___/' V constant flow of cold air above the insulation Insulation___; 1 but below the roofing material.With other roofing systems,ice buildup along the eaves Figure 20:Gable Roof can be a problem.Heat escapes from the insulation and melts snow,which runs down the roof to the cold overhangs where it freezes,causing water to back up and sometimes penetrate the roof systems.A properly installed,vented cold roof eliminates this problem.Venting space should be sufficient to allow a free flow of air from eave to ridge. �� There are a number of important % Cap considerations that influence roof Certi-label shakes or shingles , f performance in areas of heavy snowfall, (applied per specification) �fr�?� screen c� particularly mountain regions. /', e� Design,of course,is very important.The �� ��`0 -1\1,� steeper the roof the better the performance. Dcouble rse starter �� �a` ",''. Chimneys should be located at the ridge or /l� ,- �'s�� gable ends away from possible snow 7- c`a� 0���1 pressure on the slopes.Plumbing pipes //�, �\�' ,y should be located on inside walls and should be extended between the rafters and vented ` Decking at the ridge.If this is not practical then Screen_" Rigid insulation plumbing vent pipes should be galvanized iron,well anchored inside the roof.(Plastic vent pipes extending through the roof may Figure 21:Shed Roof be dislodged by sliding snow.) g Figures 20&21:Cold Roof Systems 18 COLD ROOF SYSTEM DETAILS Wide overhangs at the eaves should be avoided as they provide large cold areas for snow and visa; ice build-up.A strip of metal along the eaves /G ' \ helps shed ice quickly.Sliding ice and snow are constant hazards and should be given primary ce lding Outsideconsideration in the total doo s should not be located design. the �we�`e a�\\ \\\\j \A \ Screen bottom of a roof slope.Entrances and all ��\ pedestrian traffic areas are better situated Insulation / s P beneath the gable ends of the roof. A Interior_/ Certi-label®shakes or shingles Care must be taken in applying the sheathing , (applied per specification) boards to facilitate proper nailing.Shake or finish I shingle side lap should be increased to 2".The ��_ _ entire roof must be laid with the same precautions as those taken for any other type of � /f/ �� wood shake or shingle roof,with eaver"-----<•/1/4//, protection and an interla felt between shakes. ' ��� ' /��, a `may P Y �ll�i �lil Care in cold roof design and installation will % \/ � �\ result in a sound roof system giving many years r //h/4 of service during severe extremes of winter .INV' temperatures and snowfall. (- 1 t 1 Screen Figure 22:Half Monitor Roof ..,, j'.." 40_ ,..p •Ali; '••*--,...rj,.::., 74, 11 F _ . 1s„.,...!.,..., �. — 7.5.'::7-42- -'b.,.;4,--- . s 000 \ .., , ,, A. " _ r , . ,47,„,,,, , 1' _ �'Prigx f k may - �.:� -i lia,' Courtesy Goat Lake Forest Products Ltd. Photo:Kristy McKamey SOLID DECK APPLICATION/HIGH HUMIDITY AREA DETAILS 19 The bottom edge of the felt should be positioned In areas of high humidity where above the butt of the shake at a distance equal to Two nails(only)for each twice the weather exposure.Never inteday shingles solid sheathing is required: shake approximately 3/4'from with felt. edge and approximately 1 112" 1 above exposure line.- Following are 4 different suggested methods Space shakes 3/8' of application to increase longevity: to 5/8'apart__ -'111111N—. ...:, .//0- 1. Apply Certilast®pressure::: ii1P4$. treated shakes or shingles dilsheathin . ure 23aFig ( g ) -,!Adjactcourse r rake 2. Apply vertical strips over the Adjacent course joints `\`\ Eave protection alignment with the rafters below,then should be offset r,�;is (extend to rake edge) place horizontal furring strips on top of 1 1/2'minimum 4',�s � Starter course Gutter the vertical boards.(See Figure 23b). Rafter header Rafter Fascia 3. Apply horizontal furring strips to the Figure 23a: Certi-Last% shake application deck,spaced at the exposure of the product. (Option 1 depicted) 4. A continuous ventilation product may be used beneath the Certi-label®roofing 18"felt interlay-__ __4°overlap of felt 2 x 4 spacers material(See Figure 23c).Continuous 2 nails per shake____ —i / Ventilation Products come in a variety of _� __1x4 or 1 x 6 * 24"Certi"label shakes_ ter` designs/formats,consult your supplier. - nailing strips at 10"exposure �� �- 2 Note:Good ventilation is essential. ` ilio - `'*— Ridge and soffit vents are recommended. j *Consult with the Continuous Ventilation ° d_ ' Product Manufacturer for application and \`�\ ��!, ` installation instructions specific to its product. Shake \- \ Solid sheathing starter course__.' 36"felt underlay-- 4 t► Solid sheathing at eave (extend to rake edge) Figure 23b:Vertical Strips Over Solid Sheathing Application (Option 2 Depicted) 18"felt interlay _4"overlap of felt _Continuous ventilation 2 nails per shake_____\ a product `� 74 24"Certi-label shakes__._ % � at 10"exposure rp' e..;.';--:'---:'-',,, ,,', VY-*ze,--= ..-1, Figures 23a-23c High Humidity Area Details ///����� r' a Solid shea!hing Shake starter course_..' IN Note: The above figures are 36'felt underlay depicting a shake (extend to rake edge) application - Do not Figure 23c: Continuous Ventilation Product interlay shingles with felt. (Option 4 Depicted) 20 COVERAGE AND EXPOSURE TABLES Shingle Coverage Table 1 LENGTH AND Approximate coverage of one square(4 bundles)of shingles based on following weather exposures THICKNESS 3 1/2" 4" 41/2" 5" 51/2" 6" 61/2" 7" 71/2" 16"x 5/2" 70 80 90 100* 18"x 5/21/4" 72 1/2 81 1/2 90 1/2 100* 24"x 4/2" 731/2 80 861/2 93 100* NOTE:*Maximum exposure recommended for roofs. Shingle Exposure Table 2 Maximum exposure recommended for roofs LENGTH SLOPE Number 1 Blue Label Number 2 Red Label Number 3 Black Label 16" 18" 24" 16" 18" 24" 16" 18" 24" 3:12 to 4:12 3 3/4" 4 1/4" 5 3/4" 3 1/2" 4" 5 1/2" 3" 3 1/2" 5" 4:12 and steeper 5" 5 1/2" 7 1/2" 4" 4 1/2" 6 1/2" 3 1/2" 4" 5 1/2" Shake Coverage Table 3 see footnote(f)below Approximate coverage(in sq.ft.)of one square,when shakes are applied SHAKE TYPE,LENGTH AND THICKNESS with an average 1/2"spacing,at following weather exposures,in inches(d): 5 51/2 7 12 81/2 1 10___-_ 18"x 1/2"Handsplit-and-Resawn Mediums(a)* — 75(b,f) 100(f,c) — — 18"x 3/4"Handsplit-and-Resawn Heavies(a)* — 75(b,f) 100(f,c) j — — 18"x 5/8"Tapersawn* — Approx.75(b) 100(f,c) — — 24"x 3/8"Handsplit — — 75(e) — — 24"x 1/2"Handsplit-and-Resawn Mediums — — 75(b) 85 100(c) 24"x 3/4"Handsplit-and-Resawn Heavies — — 75(b) 85 100(c) 24"x 5/8"Tapersawn — — 75(b) 85 100(c) 24"x 1/2"Tapersplit — — 75(b) 85 100(c) 18"x 3/8"Straight-Split — 65(b) 90(c) — — 24"x 3/8"Straight-Split — — 75(b) 85 100(c) 15"Starter-Finish course Use supplementary with shakes applied not over 10"weather exposure. (a)5 bundles will cover 100 sq.ft,roof area when used as starter-finish course at 10"weather (f)Note:While most shakes are packed in exposure;7 bundles will cover 100 sq.ft.roof area at 7 1/2"weather exposure;see footnote(d). bundles of t2 courses each side(12/12)they may he packed 9/9.This will alter the number (b)Maximum recommended weather exposure for 3-ply roof construction. of bundles required to cover 1 square. (c)Maximum recommended weather exposure for 2-ply roof construction. Far example:18"shake bundles 12/12 should 9/9 (d)All coverage based on an average 1/2"spacing between shakes. packs 1 oo square vee r5%covt 7 rag°ofa exposure.qua e. pack should give 75%coverage of a square. (e)Maximum recommended weather exposure. Check with your supplier to confirm specific *100 sq.ft.coverage is based on 12/12 pack,5 bundle square,at 7 1/2"exposure. packaging(bundle size)used for your order. Shake Exposure Table 4 Formula for calculating material at reduced exposures: Maximum exposure recommended for roofs Square footage divided by reduced coverage=total SLOPE LENGTH material required e.g.you are estimating a roof that 18" 24" measures 3200 square feet(32 squares).You have decided to put 16"Certigrade®shingles(No.1 Blue Label 4:12 and steeper 71/2" 10"(a) or No.2 Red Label)at 4"exposure. (a)24"x 3/8"handsplit shakes limited to 7 1/2"maximum weather The above coverage table(Table 1)tells you that a exposure per UBC and IBC. 4-bundle square at 4"exposure covers 80 square feet. 3200 divided by 80=40 squares of material CEDAR CARE AND MAINTENANCE OVERVIEW 21 Please Note:ONLY experienced • Overhanging branches should be kept A Word About Topical Treatments professionals who follow proper safety trimmed away from the roof.This will For Installed Roofs and workmanship practices should prevent leaves,small branches and other implement the information contained debris from building up and keeping the There are hundreds of companies offering herein. roof wet. topical roof spraying and cleaning services. The Cedar Bureau has conducted an in- • Gutters and downspouts need to be depth study of care and maintenance Certi-label Cedar Is Naturally Long-Lasting cleaned regularly,usually in the spring systems,and provides the following and fall.Downspouts(leaders)should run summary: Cedar shakes and shingles have been used directly to the ground or to another gutter for hundreds of years.They have proven below.Never let a downspout drain • Avoid the fly-by-night operation that has their longevity in actual weather conditions, directly onto a lower roof surface. no permanent office,no workmanship in all types of climates.Cedar shakes and guarantee,and no local references.Fly-by- shingles contain oils that make them • Cedar needs to breathe,and therefore night operations often gouge consumers naturally decay resistant.Their insulative needs to be kept clean.Do not allow for thousands of dollars beyond the value qualities,aesthetic appeal,and wind& leaves,branches or other debris to build of their service,leaving them with impact resistance make Certi-label cedar up on the roof.Both surface areas and damaged roofs covered with unsuitable shakes and shingles the natural choice for keyways(spaces between shakes and and sometimes dangerous treatment your roofing and siding material. shingles)need to be kept clear. products. Longevity Starts With A Quality • Ensure ventilation is available,year round. If you elect to have a topical treatment Areas with louvers,ridge vents,roof vents, applied to your cedar roof,the Cedar Manufacturer and soffit vents need to be kept clear and Bureau recommends the following: Not all cedar products are alike.Purchasing never blocked off.Adequate ventilation cedar products with the"Certi"brand name ensures heat and moisture do not build 1.Check references(consumer,Better on the bundle label guarantees you that the up in the attic area.Adequate ventilation Business Bureau,Chamber of Commerce). mill undergoes inspections by an also prevents water from accumulating at independent third party inspection agency. the bottom of the roof and then freezing 2.Ask about the treatment product that is Only Cedar Shake&Shingle Bureau-A member (ice damming). being used(more details follow). mills are allowed to label their products with 3.Ask to see the company's workmanship the Certi-label.Each member mill's bundles Certi-label Cedar Is Also Available guarantee,license and workers' will have the distinctive Certi-label tucked With Pressure-Impregnated compensation coverage. under the bundle strap.Locating Certi-label Treatment Process products is as close as your nearest computer or telephone.Contact the Cedar For even longer life span,where climate is a - Bureau for more information. factor,Cedar Bureau members offer - Certi-Last preservative-treated shakes and Longevity Continues With A shingles.These products are ideal for areas -}:: Quality Installation of high humidity. Certi-Last products are cedar shakes and - . ,� Roof construction plays a major role in shingles that are factory pressure-treated by :'' determining the lifespan of cedar roofs. quality treaters who are members of the Proper design is absolutely critical to ensure Cedar Bureau.Contact the treatment ) 1 i'i HI - long-term roof integrity.Proper installation company for warranty details. `rt X11 it# will help maximize the life of cedar products. Pressure-treated Certi-Guard R or Certi-LastR Experienced care and maintenance products should not receive after-market } 11j 3 professionals can make recommendations roof treatments without written permission � s based on: from the manufacturer of such products. :• i`: , `'- • Zinc or copper strips nailed at the ridge cap can be effective to control moss. ' Reaction between rain and the zinc or copper forms a mild solution that is -C: - carried down sections of the roof.The optional use of these strips can be Brindisi and Yaroscak Custom Builders,inc. eliminated if you are using Certi-Last® Architect.George Dumitru products. u CEDAR CARE AND MAINTENANCE OVERVIEW Topical Treatment Products Powerwashing It is not within the Cedar Bureau's mandate to This is the most controversial issue in the care recommend brand names of topical roof and maintenance industry.It is a fact that high treatment products.Consult with your local pressure washing by inexperienced people professionals for product information will cause significant damage to any material. regarding cleaning and preserving cedar in Some debris can easily be removed with your area.The Cedar Bureau does,however, garden hose pressure.Some contractors recommend the following: powerwash to clean roofs,while others do not.If powerwashing is used,the roof should DO use a topical treatment receive a topical treatment to restore the roof. product that: The Cedar Bureau recommends having a professional assess each job on an individual • Offers a MSDS(Material Safety Data Sheet basis to determine if powerwashing is that lists product ingredients and safety appropriate or not.Care and maintenance precautions) professionals know the proper procedures, • Is labeled as a cedar roof treatment product which include factoring in: or has a letter from the manufacturer • Age,condition and environment of roof stating that treating cedar roofs is an appropriate use for this product • Gallons sprayed per minute • Is a water repellent,UV inhibitor,and/or • Fan tip size EPA registered wood preservative • Distance spray nozzle is held from roof • Has a manufacturer's performance guarantee • Pressure per square inch and others... DO NOT use a topical treatment The Beauty Of Cedar product that: Another good thing about cedar is that it is • Makes outrageous claims(such as a 10-year possible to replace and repair parts of the effectiveness) roof,without worrying that your replacement shakes or shingles are significantly different in • Makes fire-retardant claims composition from your original shakes or shingles.Over the hundreds of years that • Is a sealant,waterproofer or plasticizer cedar has been used,the product has remained unchanged...it's still cedar.As • Contains unfortified linseed oil,diesel fuel cedar advances to its mature stage,it is or crank case oil natural to expect some pieces to require replacement.Individual repairs are possible, The Cedar Bureau is aware of numerous and with prompt attention,proactive repairs bleaching and cleaning agents.Consumers are can extend the life of your wise Certi-label® advised to heed the preceding topical cedar investment treatment precautions before allowing such products to be applied to a cedar roof. f k _ l d s R l.r Architect:Arnold Scribner&Associates,Photo:Erven Jourdan SPECIFICATION GUIDELINES 23 This information has been designed to aid 8. All solid sheathing shall be lumber or 14. Premium and Number 1 Grade architects,consultants and builders in structural panels applied according to Certi-label shakes/shingles shall be applied specifying Certi-label®shakes and shingles.It specifications of the American Plywood with the weather exposures consistent with suggests a standardized terminology and style Association.Please note:the only solid the following tables: for ordering in the hope of improving sheet sheathing tested with shakes and Maximum weather exposure accuracy.It incorporates a general outline of shingles is plywood.Check with your local the latest application information.Please note, building official for plywood thickness/ Shingle 3:12 to 4:12 4:12 and however,that this is a specification guide only. dimensions. length roof slope steeper The information in this manual is not 16" 3 3/4" 5" intended to supercede local building codes. Roofing Felt Interlay 18" 4 1/4" 5 1/2" Refer to local building codes for more (for shakes only) 24" 4 information. 5 3/ '' 7 1/2" 9. Contractor shall apply a 36"wide strip of Shake length and exposure General Specification Data No.30 ASTM D226 Type II or No.30 ASTM D4869 Type IV roofing felt at the eave line. 18" 7 1/2" 1. The contractor shall cover all roof surfaces An 18"wide strip of No.30 ASTM D226 24" 10" with(specify one type of the following Type II or No.30 ASTM D4869 Type IV product)Certi-Split®shakes/Certi-Sawn® roofing felt shall be applied over the top Note exception for resawn shakes: shakes/Certigrade®shingles bearing the portion of the Certi-label shakes and 24"x 3/8"shake=7 1/2" Cedar Shake&Shingle Bureau®'s official extend onto the sheathing.Bottom edge of grade marked label. felt shall be positioned at a distance above 15. Chimney flashing shall extend up the 2. Shakes/shingles for roofs shall be(specify the butt equal to twice the weather chimney to a height not less than 3",up grade and length). exposure. the roof slope to a point equal in height to 3. Shakes/shingles for outer courses shall be Note:felt interlay between courses is not the flashing on the chimney but never less (specify grade and length). necessary when straight-split,or taper-split than 1 1/2 times the Certi-label 4. Shakes/shingles for undercourses shall be shakes are applied in snow-free areas at shake/shingle exposure.(All metal weather exposuresof less than one-third flashings should be painted.) (specify grade and length). Manufactured step-flashing: the total shake length(3-ply roof).Contact 5. Roof shakes/shingles shall be laid with a 5"x 7" shingle=2 1/2"wall,2 1/2"roof weather exposure of(specify in inches). the CSSB for more information or visit 8"x 12" shakes=4"wall,4"roof www.cedarbureau.org 16. Apron counter flashing shall extend to Roof Application-Sheathing Boards Roofing General Application Data within 1"of the surface of the finished 6. Certi-Split shakes/Certi-Sawn shakes shall roof. be applied over solid sheathing.A solid 10. Certi-label shakes/shingles shall be at least deck is recommended in seismic activity, doubled at all eaves. hurricane and tornado regions and in 11. Butts of the Certi-label shakes/shingles in areas where wind-driven snow is the first course on roofs shall project 1 1/2" encountered and under pressure from the edge of roof eaves to insure impregnated treated shakes and shingles. proper spill into gutters and approximately Please note that the only solid sheet 1"at gable and rake edge. sheathing tested with Certi-label®shakes 12. Certigrade shingles shall be spaced apart &shingles is plywood.Check with your not less than 1/4",not more than 3/8". local building official for plywood 13. Certi-Split or Certi-Sawn shakes shall be -- , thickness/dimensions. spaced apart not less than 3/8",not more 11 Certi-Split shakes/Certi-Sawn than 5/8". _ - shakes/Certigrade shingles may also bet applied over spaced sheathing. 7. All open sheathing shall be 1 x 4 or 1 x 6 boards(minimum 1 x 4 for both shakes and shingles). 1 i X41 - E I --r itlih . Architect:Bill Latoza,Photo:Bill Latoza za SPECIFICATION GUIDELINES 17. Where saddles or crickets are formed in Valleys 31. Each Certi-label roof shake/shingle shall back of chimneys,curves or similar be secured with two full-driven,corrosion- vertical surfaces,they shall be carried not 23.Certi-label shakes/shingles extending into resistant fasteners.(Specify size and type.) less than 10"under the Certi-label® the valley shall be sawed to the proper shakes/shingles. miter. 32. Ensure that fasteners used are accepted by your local Building Official. 18. Step flashing shall be used where vertical 24.Do not lay shakes or shingles with grain surfaces occur in connection with slopes. parallel with the centerline of valleys. Shingles: They shall be formed of separate pieces. 25.All valleys shall be installed with 33.Use 3d"box"nails for new roofs with 16" Flashing shall extend horizontally not less Certi-label shakes/shingles lapping the and 18"shingles. than 3"and up the vertical wall so that valley flashing not less than 7"on each they shall be lapped by the counter side. 34.Use 4d"box"nails for new roofs with flashing not less than 4".It shall be 24"shingles. 26.On Certi-label shingle roofs of less than installed in step fashion and each piece 6:12 slope,flashing should extend at least 35.Use 5d"box"nails for over-roofing with shall lap not less than 3"(one flashing 11"on each side. 16"and 18"shingles,and for hips installed on each course concealed under and ridges. the covering course).If other than 27. For Certi-label shakes,metal valley sheets masonry is used the flashing shall extend shall be center-crimped;of 20"minimum Shakes: up the wall not less than 3"behind the width;underlayed with a strip of No.30 sheathing paper. ASTM D226 Type II or No.30 ASTM D4869 36.Use 5d"box"nails for new roofs with Type IV roofing felt over the sheathing, 18"straight-split shakes. 19. Dormer flashings shall run 3"up under and coated with a metal paint. 37.Use 6d"box 2"nails for new roofs with the sheathing paper and not less than 3" 18"and 24"handsplit-and-resawn shakes. horizontally. 28.Valley metals that have proved reliable in 20.Window caps and all other projections at a particular geographic region should be 38.Use 5d"box"nails for new roofs with points where rain water accumulates selected.Copper flashing:check with local 24"tapersplit. must be provided with flashings,such authorities on the durability of copper 39.Use 6d"box 2"nails for new roofs with flashings must extend a distance of at valleys in your area. 18"and 24"tapersawn. least 3"up the wall behind the sheathing Fasteners 40.6d nails are usually adequate for paper. Certi-label shakes,but longer nails shall be 21. Soil pipes:Metal shall extend no less than 29. For projects within 15 miles of salt used as Certi-label shake or shingle 6"in all directions and shall be installed water-Certi-label roof shakes and thickness or weather exposure dictates. to lap and shed water to the Certi-label shingles shall be secured with two(2) stainless steel Type 316 nails. shakes or shingles below. For locations outside the 15 mile range Hips and Ridges of salt water-Certi-label roof shakes and shingles shall be secured with two(2) 22.All Certi-label shake/shingle hips and fasteners:stainless steel Type 304, ridges shall be of alternate overlap type Type 316,or hot-dipped galvanized with a applied at the same exposure as field of coating weight of ASTM A153 Class D roof and with nails long enough to (1.0oz/ft2). penetrate into sheathing at least 3/4", For Pressure Impregnated Products- position fasteners approximately 2" Fasteners used with fire-retardant-treated above exposure line.Install a strip of felt, (Certi-Guard®)or preservative-treated eave protection material or metal over (Certi-Last®)shakes or shingles must be hip or ridge under the ridge or hip cap.If stainless steel Type 316.For specifics on longer or shorter ridge cap is used,adjust installation,accessory building materials exposure accordingly. (flashing,etc.),finishes and maintenance please contact the treatment company directly. Fasteners shall be long enough to penetrate into the solid wood sheathing at least 3/4"or all the way through. 30.Nails shall be driven flush but not so that the nail head crushes the wood.They shall be placed approximately 3/4"to 1" from the side edges of the shakes/shingles and approximately 1 1/2"above the butt line of the following course. HOW TO READ A CERTI-LABEL® 25 ©2017 004 �---- O o - CERTI-SPLIT ©-- NUMBER © GRADE Handsplit Red Cedar Shakes © _ CEDAR SHAKE & SHINGLE BUREAU THE RECOGNIZED AUTHORITY SINCE 1915 SUMAS WASHINGTON (604)820 7700 LIFETIME LIMIMD WOW AVAILABLE FROM CSSB MEMBER MAMIFACTURERBELOW YEN APPLED BY A CSSB MEMBER COMIRACTORANSMILM O— --� Quality Control Building Code (11) Agency Logo Standards Mill Quality Cedar Shake& Product Testin Shingle Bureau g _-- (ID lCertification Number Numbers Label ID Number] Litho in Canada www.cedarbureau.org Country of Manufacture Mill Name • -- ` Mill Location Mill Phone Number 7 20454 00004 2 ePAh PACKING o HEAVY Y xR_/ESAWS COVERAGE q ft.(9.30 m2) © 10.0 19.0 m BUNDLES EXPOSURE (610.0 mm X 19.0 mm) 5 10'(254 mm) 1. The"Certi"Brand Name-Your Quality Assurance 8. Product Dimensions 2. Product Grade 9. Cedar Bureau Label Number 3. Product Type 10. Building Code Compliance Numbers 4. Independent,3rd Party,Quality Control Agency 11. Product Performance Tests Passed 5. This Number Shows Compliance with Total Quality 12. Label Identification Number Manufacturing System 13. UPC Code 6. Mill Name,Location and Phone Number 14. Coverage Chart and Recommended Exposure 7. Industry Product Description 15. Application Instructions on Reverse Side r 4, ' a �kk X:t '''''&; C ... " Cedar Shake& Shingle Bureau Contact us for more information: US Address Canadian Address PO Box 1178 #2—7101 Home St. Sumas,WA Mission,BC 98295-1178 V2V 7A2 TEL:604-820-7700 www.cedarbureau.org FAX:604-820-0266 info@cedarbureau.com This manual shows Cedar Shake&Shingle Bureau®recommended procedures as of the manual's print date.It is advisable to contact the Cedar Shake&Shingle Bureau®to ensure that you are using the latest available information. The CSSB logo®("C"with shingles/shakes),Blue Label®,Certi-label® Certigrade®,Certigroove®,Certi-Cut®,Certi-Guard®,Certi-Last®, Certi-Ridge®,Certi-Sawn®,Certi-Split®,Certi-Wood®and Envirosmart® are registered trademarks of the Cedar Shake&Shingle Bureau®. Other marks appearing in this manual are trademarks of the March 2017 Cedar Shake&Shingle Bureau®. Printed in Canada