WIXLIB

CERTI-LABEL WESTERN CEDAR PRODUCTS3CERTI-GUARDRPRESSURE-TREATED FIRE-RETARDANT SHAKES & SHINGLESCEDAR SHAKE & SHINGLE BUREAUCERTI-GUARDPressure-Impregnated Treated ProductsCerti-label products can also be treated. Products are available eitherfire-retardant-treated OR preservative-treated. Special care must be taken tofollow the treatment company’s recommended installation instructions.RPRESSURE-TREATED FIRE-RETARDANT SHAKES & SHINGLESCEDAR SHAKE & SHINGLE BUREAUCerti-Guard Fire-Retardant Treated Western Cedar Shinglesand ShakesNumber 1 Grades of Certigrade shingles, and Premium and Number 1Grades of Certi-Split shakes and Certi-Sawn shakes are available pressureimpregnated with fire retardants. Contact the treatment company fortreatment warranty information, accessory product requirements (includingrecommended fastener types) and application details for treated WesternCedar material. Local code jurisdictions may have additional informationregarding applications in specific areas.Certi-Last .40 CCA Preservative-Treated Western Cedar Shinglesand ShakesCERTI-LASTRPRESERVATIVE TREATED CEDAR SHAKES & SHINGLESCEDAR SHAKE & SHINGLE BUREAUNumber 1 Grades of Certigrade shingles, and Premium and Number 1Grades of Certi-Split shakes and Certi-Sawn shakes are availablepreservative-treated by pressure processes. This product is ideal in areas ofhigh humidity. 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 Western Cedar material.Note: Once Western Cedar shingles and shakes are pressure-impregnatedtreated you must contact the treatment company to determine if a finish,such as paint or stain, is allowable.Certi-label Sidewall Application TipsCerti-label Western Cedarshingle and shake size, exposure,width of joints, width of product,kiln versus air-drying process,moisture content and the localenvironment will all affect theexpansion/contraction of Certilabel Western Cedar sidewallproducts. These factors shouldalways be taken intoconsideration when determiningthe installation details andadequate spacing needed foryour specific project. Consultwith your Approved Installer andrefer to page 4 of this manual formore lateral spacing details.Architect: Shope Reno Wharton, Photo: Robert Benson

EXTERIOR NEW WALL CONSTRUCTION4Design and Application DetailsThe instructions given here are not meant tosupercede local code requirements. Checkwith your local building official for theirpreference in your area.Preparation - Be sure that the walls aresmooth, without protuberances. Nail ends orpoints should be removed or pounded flush.Underlayment - The CSSB recommendsType 30 felt underlayment (also known as#30 bituminous impregnated buildingpaper). Check with your local buildingofficial for any questions about alternativeunderlayment materials. Apply ithorizontally, with a staple gun, starting at thebase of the wall, with a 2" horizontal overlapwith each succeeding course, and a 6"overlap vertically when starting a new roll.Wrap the Type 30 felt underlayment 4" eachway around both inside and outside corners.Figure 1: StorypoleNumber 1 Grade Certi-label Western Cedarshingles spaced 1/8" to 1/4" apart (keywaysare 1/8" to 1/4" wide). These joints allow forexpansion and prevent possible “buckling.”For every 4" width of dry Certi-label WesternCedar shingle material, the product will expand1/8". Therefore space keyways accordingly,i.e.12" shingle is expected to have 3/8"expansion. Allow minimum 1/4" keywayspacing for Number 2 Grade Rebutted andRejointed Certi-label Western Cedar shingles.Corner Boards - Install corner boards(Figure 8) at this time.Flashing - Flashings associated with doors,windows, and penetration details should bein accordance with good building practice.Laying Out - Determine the number ofCerti-label courses by measuring the heightof the wall at the lowest part of thefoundation, from a point 1" below the top ofthe foundation, to the top of the wall. Dividethe height into equal parts, correspondingclosely to the weather exposure, but notexceeding the maximum weather exposurerecommended. Transfer this measurementand the number of Certi-label courses to astorypole (Figure 1), to lay out courses on allother walls. Whenever possible butt linesshould align with tops or bottoms ofwindows or other openings, and forappearance the exposure of the final courseat the top should match those below.Certi-label Western Cedar shingle and shakesize, exposure, width of joints, width ofproduct, kiln versus air-drying process,moisture content and the local environmentwill all affect the expansion/contraction ofCerti-label Western Cedar sidewall products.These factors should always be taken intoconsideration when determining theinstallation details and adequate spacingneeded for your specific project. Consultwith your Approved Installer and refer toFigure 2: Spacing Detail.Leave a side lap of at least 1 1/2" betweenjoints in successive courses.Figure 2: Spacing DetailFigures 3a and 3b: To prevent the wicking of water, which may causestaining, keep a 1/2” clearance between the first course of Certi-label productsfrom all surfaces below.Certi-label Western Cedar wall shinglesDouble coursing1/2" clearance tobottom flashingTwo last coursesover flashing1/2" clearance tobottom flashingMetal flashingBelt trim detail at topof footing wallMetal flashingFigure 3a: FlashingFigure 3b: Flashing

SIDEWALL FASTENER GUIDELINES5NailsEach Certi-label Western Cedar shingle or shake should beapplied with two corrosion-resistant fasteners, such asstainless steel (type 304 or 316), hot-dipped zinc coated, oraluminum nails or other fastener as accepted by your localbuilding official. Minimum nail lengths are shown in thefastener chart below. In double course applications, theexposed Certi-label Western Cedar shingle or shake shall beface-nailed with two hot-dipped galvanized or stainless steelcasing nails, driven 2" above the butt line, and 3/4" fromeach edge. Certi-label Western Cedar shingles wider than10" require 2 additional nails and these two nails are drivenapproximately 1" apart near the center of the shingle.NOOverdrivenNOUnderdrivenYESCorrect - flushwith surfaceStaplesStaples should be aluminum or stainless steel (type 304 orFigure 4: Nail Driving Detail 316) 16 gauge or other fastener as accepted by your localCenterline of heart1 1/2"Knot orsimilar defectFigure 5: Course Alignmentbuilding official. Two staples should be driven per Certi-labelWestern Cedar shingle or shake with the staple crowns 7/16"minimum horizontal, maximum 3/4" horizontal, to the Certilabel Western Cedar shingle or shake butt. Staples aredriven in the same location as nails relative to the sides andoverlapping butt line. Certi-label Western Cedar shingleswider than 10" require 2 additional staples and these twostaples are driven approximately 1" apart near the center ofthe shingle.Important Notes:Underdriving or overdriving anyfastener will affect the integrityof the Certi-label WesternCedar sidewall system.Certi-Guard (fire-retardanttreated) or Certi-Last(preservative-treated) WesternCedar shingles and shakes:ALWAYS ask the treatmentcompany which fasteners arerecommended for use with theirpressure-treated Certi-labelWestern Cedar shingles andshakes. Some fasteners are notcompatible with treated material.The information on this page isnot meant for use with sidewallpanel applications. Pleasecontact the manufacturer forspecific panel fastener details.Fasteners should be long enough to penetrate into thesheathing at least 3/4" or all the way through and drivenflush with the surface of the Certi-label Western Cedarshingle or shake. In all applications, staples shall beconcealed by the course above. Fasteners cannot be electrogalvanized as they will cause staining. Nails are preferred,for aesthetic reasons, in sidewall applications usingexposed fasteners.1234Wide Shingle Fastener DetailSingle Course Sidewall FastenersDouble Course Sidewall FastenersProduct TypeProduct TypeNail Type & Minimum LengthCertigrade, R&R andSanded ShinglesType (in)16", 18" and 24" Shingles5d Box 1 3/4or same size casing nailsNail Type & Minimum LengthCertigrade, R&R andSanded ShinglesType (in)16" and 18" Shingles3d Box 1 1/424" Shingles4d Box 1 1/2Certigroove ShinglesType (in)16" and 18" Shingles3d Box 1 1/424" Shingles4d Box 1 1/2Certi-Split & Certi-Sawn ShakesType (in)18" Straight-Split Shakes5d Box 1 3/418" and 24" Handsplit Shakes6d Box 224" Tapersplit Shakes5d Box 1 3/418" and 24" Tapersawn Shakes6d Box 2Certigroove Shingles16", 18" and 24" ShinglesType (in)5d Box 1 3/4Certi-Split & Certi-Sawn Shakes18" Straight-Split ShakesType (in)7d Box 2 1/4or 8d 2 1/27d Box 2 1/4or 8d 2 1/27d Box 2 1/4or 8d 2 1/27d Box 2 1/4or 8d 2 1/218" and 24" Handsplit Shakes24" Tapersplit Shakes18" and 24" Tapersawn Shakes

EXTERIOR NEW WALL CONSTRUCTION6Single CoursingDouble the starting course at the base of thewall (Figure 6). Apply with 1/8" to 1/4"keyway space between Certi-label WesternCedar shingles, giving a pronouncedindividual effect to each course.Offset the side joints in any one course atleast 1 1/2" over joints in adjacent courses(Figure 2).Plywood panelor dimensionallumber sheathingEnlarged toshow detail(Figure 6)Type 30 feltunderlayment*Use a straight edge, nailing it lightly to thewall with the edge at the butt line (to keepcourses straight and level). Check for levelevery 3 or 4 courses.The outer course is applied 1/2" lowerthan the inner course as a drip courseto help shed waterThis wall application features concealednailing (Figure 6), with nails drivenapproximately 1" above the butt line of thesucceeding course. For Certi-label WesternCedar shingles up to 10" wide, place twonails in each shingle 3/4” from each edge.With Certi-label Western Cedar shingleswider than 10", drive two additional nailsapproximately 1" apart near the center.Because Certi-label Western Cedar shinglesvary in width there should be little waste. Atcorners, or at door or window frames, youmay have to trim a selected Certi-labelWestern Cedar shingle slightly.The CSSB recommends installing overplywood panel or dimensional lumbersheathing. If other sheathing materials areapproved for use by your local buildingofficial, the holding power of the fastenersshould also be considered carefully.Plywood panelor dimensionallumber sheathingConcealed nailingType 30 feltunderlayment*The outer course is applied 1/2" lowerthan the inner course as a drip courseto help shed waterUndercoursing grade shingles*The Cedar Bureau recommends Type 30 felt underlayment andwill refer to required underlayment with this description throughoutthis manual. Check with your local building official for any questionsabout alternative underlayment materials.Figure 6: Single CoursingArchitect: Shope Reno Wharton, Photo: Robert Benson

EXTERIOR NEW WALL CONSTRUCTION7Double CoursingTo obtain an attractive wall characterized bywide weather exposures and deep shadowlines, Certi-label Western Cedar shingles andshakes can be applied double coursed. Thismethod offers economy because of the wideexposures of the outer course and the use ofless expensive undercoursing Certi-labelWestern Cedar shingles for the under layer(Figure 7). For double coursing exposuredetails refer to the chart on page 12.In double coursing, the bottom or startercourse is laid triple with two undercourseCerti-label Western Cedar shingles or oneundercourse Certi-label Western Cedarshingle over a wood lath and then the outercourse. This gives the bottom course thesame slant as succeeding courses. All outercourses are applied 1/2" lower than theundercourse (Figure 7). A straight edge canbe used to facilitate placement and nailing ofboth the undercourse and exposed course.Number 3 or undercoursinggrade Certi-labelWestern Cedar shinglesPlywood panelor dimensionallumber sheathingType 30 feltunderlaymentThe outer course is applied 1/2" lowerthan the inner course as a drip courseto help shed waterApply nails instraight line approximately 2"above shingle buttsDouble undercoursingFigure 7: Double CoursingUndercourse Certi-label Western Cedarshingles are fastened at the top with one nailor staple in the center. The exposed Certilabel Western Cedar shingle or shake is facenailed with two casing-type nails, drivenapproximately 2" above the butt line, 3/4"from each edge. With Certi-label WesternCedar shingles wider than 10" drive twoadditional nails approximately 1" apart nearthe center.The CSSB recommends installing overplywood panel or dimensional lumbersheathing. If other sheathing materials areapproved for use by your local buildingofficial, the holding power of the fastenersshould also be considered carefully.Architect: Tanner and VanDine Architects, Photo: Mark Citret

EXTERIOR NEW WALL CONSTRUCTION8CornersNeatly fitting inside or outside corners areeasily made. It is standard practice to laceoutside corners (Figure 8e). On wideexposures this method requires small nailsnear the Certi-label Western Cedar shinglebutts to tighten and hold the lapped corners.For these corners use only nails that arecorrosion resistant. In double courseapplications, the exposed Certi-label WesternCedar shingle or shake shall be face-nailedwith two hot-dipped galvanized or stainlesssteel casing nails, driven 2” above the buttline, and 3/4” from each edge. Certi-labelWestern Cedar shingles wider than 10”require 2 additional nails and these two nailsare driven approximately 1 inch apart nearthe center of the shingle. Corner boards alsocan be used to advantage by nailing a 1 x 4cedar board to a 1 x 3 cedar board, thenattaching the preassembled corner to thebuilding (Figure 8a).It is good practice to use flashing behindCerti-label Western Cedar shingles or shakesat the inside corners. They may be buttedagainst a square wood strip (Figure 8b), orthey may be fitted one course to the other(Figure 8d). When the latter method is used,courses must be completed on each wallprogressively, and can be best applied byworking from the corners while alternatelyfitting one course to the other. (Figure 9)1x41x3bacdea) Certi-label Western Cedar shingles butted against c) Mitered cornercorner boardsd) Laced inside corner with flashing behind insideb) Certi-label Western Cedar shingles butted againststrip on cornersquare wood strip, flashing behinde) Alternated laced outside cornerFigure 8: Corner Option DetailsIt is preferred practice to installinside/outside corner flashing tosafeguard against the crackingor tearing of Type 30 feltunderlayment at these corners.Figure 9: Fitting Laced Corner Courses

EXTERIOR NEW WALL CONSTRUCTION9Design and Application InstructionsStaggered Butt CoursingFor single course application, an attractiveeffect can be made by staggering the butt ofthe Certi-label Western Cedar shingle fromthe horizontal line. Apply the Certi-labelWestern Cedar shingle irregularly at variabledistances below (but not above) thehorizontal line.Staggered butt applications are made byshortening the exposure less than thegreater maximum exposure. No Certi-labelWestern Cedar shingles or shakes shall beapplied greater than the maximum exposureallowed. Check with local building codes forapproval of the staggered butt coursinginstallation method.1" max. for 16" &18"Certi-label WesternCedar shinglesPlywood panelor dimensionallumber sheathing1 1/2" max. for 24"Certi-label WesternCedar shinglesType 30 feltunderlaymentThe outer course is applied 1/2" lowerthan the inner course as a drip courseto help shed waterDouble starter courseFigure 10: Staggered CoursingButt nail all double coursed Certi-label WesternCedar shingles that are exposed more than theirmaximum single course exposure.Architect: Alfredo De Vido Associates, Photo: Paul WarcholRibbon CoursingA double shadow line effect can be obtainedby raising the outer course Certi-labelWestern Cedar shingles approximately 1"above the undercoursing. Use Number 1Grade Certi-label Western Cedar shingles forundercoursing when applying ribboncoursing (Figure 11).Plywood panelor dimensionallumber sheathingType 30 feltunderlaymentFinished courseDouble starter courseThe outer course is applied 1/2" lowerthan the inner course as a drip courseto help shed waterFigure 11: Ribbon Coursing

EXTERIOR OVER-WALL AND RE-WALL CONSTRUCTION10Design and Application InstructionsFurring if requiredRe-wallingOnce the old exterior wall material has beenremoved and the old nails or otherprotrusions cleaned away, the new wall canbe applied. Type 30 felt underlaymentshould be applied since it is newconstruction.Over-wallingApplying Certi-label Western Cedar shinglesor shakes right over an old wall - whetherwood, brick, stucco, or synthetic products - iseasily done. It saves time involved in bothremoving the old exterior and in disposing ofit. However, avoid nailing over vinyl oraluminum as they are not sufficiently strongto provide a proper support.First, nail moulding strips on the face ofexisting window and door casings, flush withthe outer edges. The Certi-label WesternCedar shingles or shakes are then joined tothe mouldings (Figure 12).Over Beveled Siding - Applying a newCerti-label Western Cedar shingle or shakewall over old beveled siding can beaccomplished in either of two ways: 1) Byfilling in the low points of the wall with lowgrade lumber or plywood strips (calledhorse feathers) of appropriate thickness andthereby increasing the potential nailingsurface, or 2) by nailing the Certi-labelWestern Cedar shingles or shakes to the highpoints of the bevels of each course of the oldwall, or of alternate courses (provided itdoes not result in weather exposure greaterthan is recommended (Figure 13).1. Apply new casing to bring Certi-label WesternCedar shingles or shakes flush with surface2. The integrity of the original flashing is to beutilized. Additional trim is considered to bedecorative only. If the original window does nothave good structural integrity, it must beremoved and a new one installed. New casingsare to be installed as part of proper wallconstruction as shown throughout this manual.2Figure 12: Typical Window and Door Casing DetailFigure 13: Over BeveledSiding DetailDouble starter course1 x 3 or 1 x 4 nailingstrips spaced according toexposure of Certi-labelWestern Cedar shingles orshakes, regardless ofsingle or double course.(See pages 6-7 )Figure 14: OverMasonry DetailEnsure that the first course is properlyattached. All Certi-label Western Cedarshingle and shake product installation mustmeet nailing and exposure guidelines asdetailed in this manual. It may be necessaryto add occasional nailing strips.Over Masonry - Masonry walls are easilycovered, by vertically furring the walls andapplying nailing strips (1 x 3 or 1 x 4) spacedaccording to the exposure and single/doublecourse product design. The nailing stripsshould be fastened with special nails, drivenbetween the bricks or blocks, so that theouter shingled wall will be firmly attached(Figure 14).1Double starter courseOver Stucco - Nailing strips should beattached with nails long enough to penetratethe stucco and the underlying sheathing. Donot apply directly to the stucco, which is tooweak to provide a proper support. If the oldstucco is removed, new Type 30 feltunderlayment is then applied to the walls,and the shingling can proceed as in newconstruction (Figure 15).Figure 15: Over Stucco DetailDouble starter course

INTERIOR WALL CONSTRUCTION11Design and Application DetailsCerti-label Western Cedar shingles or shakesare building materials that adapt easily tomany different structural forms. Their use ininteriors is practically unlimited, and a widevariety of imaginative effects can beachieved.Certi-label Western Cedar shingles or shakescan be readily applied over almost anyinterior wall surface, including wood

Red Cedar Shingles CEDAR SHAKE & SHINGLE BUREAU THE RECOGNIZED AUTHORITY SINCE 1915 SUMAS, WASHINGTON (604) 820-7700 The premium grade of shingles for sidewalls and roofs. These top-grade shingles are 100% heartwood, 100% clear and 100% edge grain. Available in 16" or 18" or 24" lengths. Note: Western Cedar's natural color varies.