![]() ![]() Sections of flashing shall have an end lap of not less than 4 inches (102 mm). The valley flashing shall extend not less than 11 inches (279 mm) from the centerline each way and have a splash diverter rib not less than 1 inch (25 mm) high at the flow line formed as part of the flashing. 26 galvanized sheet gage) corrosion-resistant metal. V asd shall be determined in accordance with Section 1609.3.1.Īt the juncture of the roof vertical surfaces, flashing and counterflashing shall be provided in accordance with the manufacturer's installation instructions, and where of metal, shall be not less than 0.019-inch (0.48 mm) (No.Perimeter fastening areas include three tile courses but not less than 36 inches from either side of hips or ridges and edges of eaves and gable rakes.Horizontal battens are required for slopes over 7:12. Provisions shall be made for drainage by a riser of not less than 1/ 8 inch at each nail or by 4-foot-long battens with not less than a 1/ 2-inch separation between battens. Battens shall be not less than 1 inch by 2 inch nominal. The nose of all tiles shall be securely fastened. ![]() Not fewer than two fasteners per tile are required or battens and one fastener. Attaching wire for clay and concrete tile shall not be smaller than 0.083 inch. Fasteners shall be long enough to penetrate into the sheathing 3/ 4 inch or through the thickness of the sheathing, whichever is less. Corrosion-resistant nails not less than No. Structural metal panels that do not require a substrate or underlayment.The cap nail shank shall have a length sufficient to penetrate through the roof sheathing or not less than 3/ 4 inch (19.1 mm) into the roof sheathing. The cap nail shank shall be not less than 0.083 inch for ring shank cap nails and 0.091 inch (mm) for smooth shank cap nails. Thickness of the outside edge of plastic caps shall be not less than 0.035 inch (mm). Power-driven metal caps shall have a thickness of not less than 0.010 inch (mm). Metal caps shall have a thickness of not less than 32-gage sheet metal. Underlayment shall be attached using metal or plastic cap nails with a nominal cap diameter of not less than 1 inch (25.4 mm). End laps shall be 4 inches (102 mm) and shall be offset by 6 feet (1829 mm). The underlayment shall be attached with corrosion-resistant fasteners in a grid pattern of 12 inches (305 mm) between side laps with a 6-inch (152 mm) spacing at side and end laps. Starting at the eave, apply 36-inch-wide (914 mm) strips of underlayment felt, overlapping successive sheets 19 inches (483 mm). As an alternative, two layers of underlayment complying with ASTM D226 Type II or ASTM D4869 Type IV shall be permitted to be installed as follows: Apply a 19-inch (483 mm) strip of underlayment parallel with the eave.An approved underlayment for the applicable roof covering for design wind speeds less than 120 mph (54 m/s) shall be applied over the 4-inch-wide (102 mm) membrane strips. As an alternative, a minimum 4-inch-wide (102 mm) strip of self-adhering polymer modified bitumen membrane complying with ASTM D1970 and installed in accordance with the manufacturer's installation instructions for the deck material shall be applied over all joints in the roof decking.As an alternative, self-adhering polymer modified bitumen underlayment complying with ASTM D1970 and installed in accordance with the manufacturer's installation instructions for the deck material, roof ventilation configuration and climate exposure for the roof covering to be installed shall be permitted. ![]()
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