FRAMING • Apply these panel siding products on walls and gables that meet racking requirements. • Follow specific nailing pattern (see Fig. 6). • Framing must not exceed 16 in. on center (o.c.). • Although not recommended, where 24 in. o.c. vertical framing is used, nail to framing 24 in. o.c. with intermediate nailing 12 in. o.c. to sheathing with a 6d galvanized ring shank nail. This effectively creates a 12 in. o.c. nailing schedule. SHEATHING • Sheathing is required for all siding products. Recommended sheathing is a minimum of 7/16 in. OSB or 1/2 in. exterior grade plywood. • Foam sheathing or other composite sheathing may be substituted. Collins Products LLC will not be responsible for problems related to crushing of the foam during or after siding applications, or moisture accumulation in the wall cavity. VAPOR BARRIERS, VENTILATION AND MOISTURE CONTROL • Roofs, gutters, roof to wall transitions, windows, doors, decks and attachments shall be designed, flashed and installed to prevent moisture entry into the siding or wall cavity or accumulation of water against the siding other than ambient moisture. • Siding must have 2 in. clearance from masonry, concrete, brick, stone, stucco or mortar, or be properly flashed (see Fig. 7). • A continuous vapor barrier rated 1 perm or less is required across the interior side of all walls to be sided. • A vapor barrier rated 1 perm or less must be installed between the wood sill, wood framing and the foundation wall. • A vapor barrier ground cover must be used in crawl spaces.
• Crawl spaces, attics and living spaces must be ventilated at least to the minimum specified in HUD standards. FLASHING • In areas where the bottom drip edge of the siding is adjacent to flashing, provide a minimum 3/8 in. gap between bottom drip edge of the siding and the flashing (see Fig. 7). • Install flashing in a manner that creates proper out-sloping (see Fig. 7). • Kick out flashing is required in areas where the roof and gutters are adjacent to the siding. Provide a 1 in. clearance between the gutter end and the siding (see Fig. 8). INSTALLING • Examine the framed structure to determine the positioning of the studs in relation to the exterior corners, windows and openings. Plan for areas that do not allow for installation of full panels. • From your pre-selected starting position, place a panel square on the wall with the bottom edge level. All side edges must be positioned over studs. All horizontal edges must be positioned over framing. When positioning the next panel, do not force the panel into place. If installing a shiplap panel, place overlap edge on top of the underlap edge prior to nailing.
• At corners, use TruWood Trim (see Fig. 3). • Follow fastening schedule (see Fig. 6).
FASTENING • Use corrosion resistant boxhead nails with a minimum head diameter of 1/4 in. (10% variance allowed). • Fastening must not exceed 16 in. o.c. (see Framing section for 24 in. o.c. stud spacing). • All siding joints must be located on studs (see Fig. 2). • Nails must penetrate wood framing 1-1/2 in.
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