Installation Manual - CertainTeed

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CertainTeed WeatherBoards Fiber Cement Siding Installation Manual Section 6: Cutting Installing fiber cement siding requires carpentry skills and knowledge that are unique to this material. There are two key techniques to the way the material is cut and fastened. Also, good wall preparation is extremely important to a quality job, so much so that we have devoted a full section to it starting on page 27. Personal Protective Equipment When fiber cement is cut or drilled, it will create dust. This dust may contain crystalline silica, which can pose a health risk. Using the recommended cutting tools and blades can greatly reduce the amount of dust generated when cutting fiber cement. To minimize dust, use cutting tools equipped with a dust collector, and never use water when cutting. Ensure adequate ventilation by working outdoors or by using mechanical ventilation to reduce potential exposure below applicable exposure limits. If ventilation is not adequate to limit exposure, wear a NIOSH-approved disposable respirator (N95) or air purifying cartridge respirator fitted with N (non-oil), P, or R series filters. Finally, always wear safety goggles and dust protection equipment when operating cutting tools. Cutting Tools and Blades 18 Good Better Best Recommended Tools and Blades Power miter saw with polycrystalline diamond-tipped blade XXCreates more dust than a circular saw with a polycrystalline diamondtipped blade Circular saw with carbide-tipped blade XXBecomes dull faster and creates more dust than polycrystalline diamondtipped blade Circular saw with polycrystalline diamondtipped blade X X Creates less dust than miter saws and carbide-tipped blades Requirements XXCut fiber cement board face down when using a circular saw or mechanical shears. Cover the saw table with a piece of carpet or soft cover to avoid scratching the face of the siding. Proper Cutting Setup Use good support and position the siding face down when using a circular saw or mechanical shears. XXCut fiber cement board face up when using a chop/ miter saw. XXWhen cutting fiber cement, support the board along its length and near the cut. XXTo avoid breakage, use extra care when you cut near the edge. Leave Protective Film on Cedar Lap Siding with CertainTeed ColorMax ® Finishing System until board is installed.
CertainTeed WeatherBoards Fiber Cement Siding Installation Manual XXHandle narrow and notched pieces carefully to avoid breakage. XXWhen cutting beaded siding profile, start the cut against the bead. XXWhen cutting CertainTeed WeatherBoards Fiber Cement Cedar Lap Siding with CertainTeed ColorMax ® finish, leave the protective film in place until the siding is nailed to the substrate; then remove it before applying the next course. NOTE: Always re-seal all field-cut edges with 100% acrylic latex paint or primer before installing fiber cement. Section 7. Fastening Fiber Cement should be fastened to studs or solid framing a maximum of 24" on center (o.c.). In some instances, there may not be a stud or framing member available to fasten into—such as along a rake, inside or outside corners, or at a window or door opening. In these areas, the fiber cement must be fastened to a structuralrated sheathing. Refer to the “Basic Fastening Schedule” for applications in wind zones up to 110 mph (≤30 ft. high, Exposure B). Building codes and regulations vary throughout the country. In some specific situations, fastening into other structural materials may be acceptable. Refer to local building codes and/or ICC-ES Report ESR-1668 found on www.certainteed.com for alternative applications or wind conditions. All fasteners must be corrosion-resistant, double hotdipped galvanized or stainless steel. Do not use electrogalvanized nails because they corrode faster, especially in coastal areas. NOTE: Basic fastening schedule appears on page 26. Nails XXCertainTeed recommends non-corrosive, double hotdipped, galvanized or stainless steel siding nails. Do not use electro-galvanized nails. XXOther non-corrosive nails may be acceptable; refer to local building codes. XXColor-matched, double hot-dipped, galvanized nails for face nailing siding and trim with CertainTeed ColorMax ® finish are available from Maze Nails (www.mazenails.com). Screws XXMust be non-corrosive and designed for use with fiber cement. XXScrew type is determined by application and/ or wall design XXScrew head diameter should be equal to or greater than 0.375". The following suppliers manufacture screws specifically designed for use with fiber cement siding: XXGrabber ® : www.grabberman.com XXITW Buildex: www.itwbuildex.com XXPrime Source ® : www.pro-twist.com XXSimpson-Strong-Tie Quik Drive ® : www.strongtie.com NOTE: For ICC reports, refer to www.certainteed.com 19
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Installation Manual - CertainTeed

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