Exterior and Interior WALL MANUAL R
Credits, front cover: Left column 1. Architect: Shope Reno Wharton, Photo: Robert Benson 2. Architect: Gaylord Grainger, Libby O’Brien-Smith Architects, Photo: Eduardo Calderon 3. Architect: Meyers and D’Aleo, Inc., Photo: Otto Baitz Centre columm 1. Architect: Gary Tabasinske, AIA, Photo: Chris Eden 2. Architect: Alfredo De Vido Associates, Photo: Paul Warchol Right column 1. Architect: Tanner and VanDine Architects, Photo: Mark Citret 2.
INTRODUCTION This manual is intended for use with Western Red Cedar and Alaskan Yellow Cedar shingle and shake applications only. Western Red Cedar products manufactured by CSSB members are labeled with the “Certi” brand name. Alaskan Yellow Cedar products manufactured by CSSB members are labeled with “Yellow Cedar” at the top of their label.
CERTI-LABEL WESTERN CEDAR PRODUCTS 1 CERTIGRADE® WESTERN CEDAR SHINGLES Number 1 Blue Label® CERTIGRADE Red Cedar Shingles - 100% Edge Grain - 100% All Clear - 100% Heartwood - 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. CEDAR SHAKE & SHINGLE BUREAU THE RECOGNIZED AUTHORITY SINCE 1915 SUMAS, WASHINGTON (604) 820-7700 Number 2 Red Label A good grade for many applications.
CERTI-LABEL WESTERN CEDAR PRODUCTS 2 SPECIALTY CERTI-LABEL WESTERN CEDAR SIDEWALL PRODUCTS Certigrade® Rebutted & Rejointed Shingles Also known as R&R products, these materials have the same specifications as Number 1 and Number 2 Certigrade shingles, but they are machine re-trimmed for parallel edges and with smooth butts sawn at right angles where a uniform appearance is desired. They are primarily used for sidewall applications.
CERTI-LABEL WESTERN CEDAR PRODUCTS 3 CERTI-GUARD R PRESSURE-TREATED FIRE-RETARDANT SHAKES & SHINGLES CEDAR SHAKE & SHINGLE BUREAU CERTI-GUARD Pressure-Impregnated Treated Products Certi-label products can also be treated. Products are available either fire-retardant-treated OR preservative-treated. Special care must be taken to follow the treatment company’s recommended installation instructions.
EXTERIOR NEW WALL CONSTRUCTION 4 Design and Application Details The instructions given here are not meant to supercede local code requirements. Check with your local building official for their preference in your area. Preparation - Be sure that the walls are smooth, without protuberances. Nail ends or points should be removed or pounded flush. Underlayment - The CSSB recommends Type 30 felt underlayment (also known as #30 bituminous impregnated building paper).
SIDEWALL FASTENER GUIDELINES 5 Nails Each Certi-label Western Cedar shingle or shake should be applied with two corrosion-resistant fasteners, such as stainless steel (type 304 or 316), hot-dipped zinc coated, or aluminum nails or other fastener as accepted by your local building official. Minimum nail lengths are shown in the fastener chart below.
EXTERIOR NEW WALL CONSTRUCTION 6 Single Coursing Double the starting course at the base of the wall (Figure 6). Apply with 1/8" to 1/4" keyway space between Certi-label Western Cedar shingles, giving a pronounced individual effect to each course. Offset the side joints in any one course at least 1 1/2" over joints in adjacent courses (Figure 2).
EXTERIOR NEW WALL CONSTRUCTION 7 Double Coursing To obtain an attractive wall characterized by wide weather exposures and deep shadow lines, Certi-label Western Cedar shingles and shakes can be applied double coursed. This method offers economy because of the wide exposures of the outer course and the use of less expensive undercoursing Certi-label Western Cedar shingles for the under layer (Figure 7). For double coursing exposure details refer to the chart on page 12.
EXTERIOR NEW WALL CONSTRUCTION 8 Corners Neatly fitting inside or outside corners are easily made. It is standard practice to lace outside corners (Figure 8e). On wide exposures this method requires small nails near the Certi-label Western Cedar shingle butts to tighten and hold the lapped corners. For these corners use only nails that are corrosion resistant.
EXTERIOR NEW WALL CONSTRUCTION 9 Design and Application Instructions Staggered Butt Coursing For single course application, an attractive effect can be made by staggering the butt of the Certi-label Western Cedar shingle from the horizontal line. Apply the Certi-label Western Cedar shingle irregularly at variable distances below (but not above) the horizontal line. Staggered butt applications are made by shortening the exposure less than the greater maximum exposure.
EXTERIOR OVER-WALL AND RE-WALL CONSTRUCTION 10 Design and Application Instructions Furring if required Re-walling Once the old exterior wall material has been removed and the old nails or other protrusions cleaned away, the new wall can be applied. Type 30 felt underlayment should be applied since it is new construction. Over-walling Applying Certi-label Western Cedar shingles or shakes right over an old wall - whether wood, brick, stucco, or synthetic products - is easily done.
INTERIOR WALL CONSTRUCTION 11 Design and Application Details Certi-label Western Cedar shingles or shakes are building materials that adapt easily to many different structural forms. Their use in interiors is practically unlimited, and a wide variety of imaginative effects can be achieved. Certi-label Western Cedar shingles or shakes can be readily applied over almost any interior wall surface, including wood, brick, plaster, or concrete.
SIDEWALL APPLICATION GUIDELINES 12 General Application Notes 1. The contractor shall cover all wall surfaces with Certi-label Western Cedar shingles or shakes bearing the Cedar Shake & Shingle Bureau's official grade marked label. 2. Certi-label Western Cedar shingles/ shakes for outer courses shall be (specify grade and length). 3. Certi-label Western Cedar shingles/ shakes for undercourses shall be (specify grade and length).
SIDEWALL FINISHING 13 Exterior Finishes (also known as Coatings) There are a variety of paints, stains, and preservative treatments available for Certi-label Western Cedar sidewall products. Certi-label sidewall products are available pre-finished, (pre-primed or pre-stained) and natural (unfinished). Please note: A detailed product finishing discussion is beyond the scope of this manual; however, a brief overview is presented below.
SIDEWALLPHOTOS COVERAGE TABLE 14 Certigrade Shingles - Coverage (Number 1 Grades) Approximate coverage, in square feet, of one square (4-bundle roof-pack) of shingles, applied at indicated weather exposures. (Some exposures on this chart are not acceptable for single course application. Consult the maximum exposure table on page 12 for more details).
SIDEWALL COVERAGE TABLE 15 Certi-Split Shakes-Coverage (Number One or Premium Grades) Approximate coverage, in square feet, of one square of shakes applied at indicated weather exposures. (Some exposures on this chart are not acceptable for single course application. Consult the maximum exposure table on page 12 for more details).
HOW TO READ A CERTI-LABEL ©1963,1998 1 16 404 Red Cedar Shingles - 100% Edge Grain - 100% All Clear - 100% Heartwood CEDAR SHAKE & SHINGLE BUREAU THE RECOGNIZED AUTHORITY SINCE 1915 SUMAS, WASHINGTON (604) 820-7700 20 YEAR WARRANTY AVAILABLE FROM A CEDAR BUREAU APPROVED INSTALLER CERTIFICATE NO. Building Code Quality Control Standards Agency Logo Product Testing Mill Quality Numbers Certification Number Label ID Number CERTI-LABEL Litho in Canada ® www.cedarbureau.
R Contact us for more information: TEL: 604-820-7700 FAX: 604-820-0266 www.cedarbureau.org info@cedarbureau.com US Address PO Box 1178 Sumas, WA 98295-1178 Canadian Address #2 – 7101 Horne St. Mission, BC V2V 7A2 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.
