USES FOR TRUWOOD TRIM Truwood Trim is a non-structural decorative trim product. TruWood Trim may be used for all of the following trim applications: • Fascia • Rake board • Frieze board • Belly band • Window trim (not to be used for window sills) • Corners • Column wrap • Board and Batten • Door trim 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 trim or wall cavity or accumulation of water against the trim other than ambient moisture. • Trim must have 2 in. clearance from masonry, concrete, brick, stone, stucco or mortar, or be separated by metal flashing. • 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 trim is adjacent to flashing, provide a minimum 3/8 in. gap between bottom drip edge of the trim and the flashing. • Install flashing in a manner that creates proper out-sloping (see Fig. 4 and 5). • 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 trim (see Fig. 7). CUTTING • Cut with conventional tools into the face to be exposed. • Make sure to prime and paint all cut edges. • Do not miter sides (edges) of trim. If trim is cut to fit around door and window openings, raw edges of trim must be primed and painted or sealed with approved sealant (see Fig. 6). • 45 degree diagonal cuts are permitted around door and window openings (see Fig. 6). FASTENING • Use corrosion resistant boxhead nails with a minimum head diameter of 1/4 in. (10% variance allowed). • Nail on each edge 12 in. o.c. alternating edges with nails placed a minimum of 1/2 in. from trim edge. • Nails must penetrate wood framing 1-1/2 in. • Fascia and rake boards must be applied over framing members that will allow proper nailing. • Avoid countersinking nails or rupturing the surface of the siding. If countersinking occurs, seal nail prior to painting (see Fig. 1). • Do not nail into trim edges. • Fasten from end to end or center to end to avoid internal stress.
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