Product Control No.: 00-1023.02 SHINGLE SYSTEM APPLICATION Deck Type: 19/32" or greater plywood or wood plank Underlayment: Solid Sheathing: Two plies of ASTM D 226, Type I felt overlapped 19", or a single layer of ASTM D 226 Type II felt overlapped a minimum of 4" on side laps, and 6" on center the end laps. Fastened with corrosion resistant 12 ga. roofing nails through tin caps. Fastened with two staggered rows in the field of the sheet with a maximum fastener spacing of 12" on center., and one row at the laps fastened 6"on center.. Spaced Sheathing: Underlayment shall be installed at a minimum of 36" wide at the eave line, and shall be a minimum of two plies of ASTM D 226, Type I felt overlapped 19", or a single layer of ASTM D 226 Type II felt overlapped a minimum of 4" on side laps, and 6" on the end laps. Fastened with corrosion resistant 12 ga. roofing nails through tin caps. Fastened with two staggered rows in the field of the sheet with a maximum fastener spacing of 12" on center., and one row at the laps fastened 6" on center, at a minimum of 36" from the eave of the roof. Edge Metal: Edge metal shall comply with section 3408 of the SFBC, and Roofing Application Standard PA 111. Valleys: Valleys may be installed open or closed. A 36" wide sheet of minimum ASTM D 226 Type II organic felt shall be installed over the underlayment and centered in the valley, fastened 6" on center. through tin-caps at each edge of the sheet. Minimum end laps shall be 12" and adhered with approved flashing cement. Valley metals shall comply with the section 3408 of the SFBC. Valley metal shall be performed with a minimum 1" high center water diverter, with a minimum formed width of 20". Metal shall be fastened with minimum approved 1¼" annular ring shank nails fastened 12" on center. within one inch of the edge. Metal laps shall be a minimum of 12", and shall be sealed with approved flashing cement. For open valley installations, the wood shingles are to be cut to form a straight edge. The open area of the valley shall be no less than 4" and no more than 8" wide. For closed valley installations, the wood shingles are to be miter cut along the center water diverter at the center of the valley. Wood shingle fasteners shall be kept back at least 8" from the valley centerline. Wider wood shingles and the positioning of the fasteners higher at the valley may be required. Application: Maximum exposure shall comply with table 34-C of the SFBC. An optional interlayment sheet may be installed between wood shingles in solid sheathing applications. Interlayment shall be required in all spaced sheathing applications. Interlayment shall be a minimum of ASTM D 226 Type I felt with a minimum width of 18" and shall be applied between each succeeding course of wood shingles. Interlayment shall be fastened on the upper edge of the sheet. The bottom edge of the interlayment shall be positioned above the butt edge of each course of wood shingles, a distance equal to triple the weather exposure wood shingles. Extended interlayment up vertical surfaces a minimum of 4". No felt shall be exposed. The beginning or starter course of wood shingles at the eave line shall be doubled as a minimum. The wood shingles shall project a minimum ¾" to a maximum of 2" beyond the drip edge at both eaves and rakes. Spacing between shingles (joints or key ways) shall be a minimum of ¼" and a maximum of 3/8". Shingles shall be positioned so that they cover the joints in the preceding course and adjacent courses shall be offset a minimum of 1½". In any three courses (adjacent), no two joints should be directly aligned (see Detail 'A') Fastening: Each shingle shall be fastened with a minimum of two (2) 5d hot-dipped, galvanized box nails. Fastened ¾" to 1" from the edge of the shingle, and 1½'' to 2" above the butt line of the next course. In all cases, fasteners shall be of sufficient length to penetrate through the plywood panel or wood plank decking not less than 3/16", or to penetrate into a 1", or greater, thickness of lumber not less than 1". Nails shall be driven straight and flush. Nails shall not be overdriven. Hips and Ridges: Hip and ridges may be installed from pre-manufactured units or field assemble units from manufacturer's shingles. The exposed juncture of the roof hip and ridge areas shall be covered with a minimum 6" wide strip of ASTM D 226 type II organic felt, prior to installing the hip and ridge units. No felt shall be left exposed. Lay alternate overlapping hip and ridge units, starting with a double starter course. Each side of the hip and ridge units shall be a minimum of 4" wide. Each hip and ridge unit shall be fastened to the roof with two fasteners of the same type as that used for the field shingles. Fasteners shall be of sufficient length to penetrate the plywood panel or wood plank decking not less than 3/16"; or to penetrate into a 1", or greater, thickness of lumber not less than 1 ". Nails shall be driven straight and flush. Nails shall not be overdriven. Flashing: Metal flashing materials shall comply with section 3408 of the SFBC. Metal step flashing shall be used at all vertical side walls. The length of the step flashing units shall be 3" longer than the exposure of the shingles. The step-flashing unit shall be installed just up slope from the exposed area of the wood shingle, in such a manner as to be covered by the next wood shingle, while maintaining a minimum 3" headlap. Step flashing metal shall extend 5" up the vertical surface and 5" horizontally onto the wood shingle. Nail each step-flashing unit near the upper comer. Location of the shingle fasteners must be adjusted to insure that the step flashing is not penetrated. Vertical head walls shall be flashed with apron type metal flashing. Wood shingles shall be installed up to the vertical head wall. The head wall flashing shall then be installed to extend up the vertical surface 5", and out over the top course of wood shingles a minimum of 5". Wall treatment or metal counter flashing shall be brought down over all vertical flanges of the step flashing or head wall flashing a minimum of 3" and shall terminate a minimum of 1" above the surface of the wood shingles. Metal counter flashing shall be installed in compliance with Roofing Application Standard RAS 111. Roof Penetrations: Roof penetrations shall be flashed at all intersecting angles to prevent leakage. Flashing details shall be in compliance with manufacturer's recommendations. Minimum Slope: 3":12" Frank Zuloaga, RRC Roofing Product Control Examiner