2018 irc roof sheathing requirements

Self-adhering polymer-modified bitumen. Asphalt shingle packaging shall bear a. Fasteners for asphalt shingles shall be galvanized steel, stainless steel, aluminum or copper roofing nails, minimum 12-gage [0.105 inch (3 mm)] shank with a minimum, Asphalt shingles shall have the minimum number of fasteners required by the manufacturer's, Where required, ice barriers shall comply with, Flashing for asphalt shingles shall comply with this section and the asphalt shingle manufacturer's, Base and cap flashing shall be installed in accordance with manufacturer's instructions. Interlayment shall comply with ASTM D226, Type I. The installation of wood shingles shall comply with the provisions of this section. Valley linings shall be installed in accordance with the manufacturer's instructions before applying shingles. Reroofing shall not be required to meet the minimum design, For roofs that provide positive drainage, recovering or replacing an existing, Complete and separate roofing systems, such as standing-seam metal roof systems, that are designed to transmit the roof loads directly to the building's structural system and do not rely on existing roofs and, Where the existing roof has two or more applications of any type of. CONTINUE WITH CODE REQ'S The installation of thermoplastic single-ply roofing shall comply with the provisions of this section. In areas where the average daily temperature in January is 25F (-4C) or less, Wood shingles shall be installed in accordance with this chapter and the manufacturer's instructions. Asphalt shingles shall comply with ASTM D3462. Base flashing shall be of either corrosion-resistant metal of minimum nominal 0.019-inch (0.5 mm) thickness or mineral-surfaced roll roofing weighing not less than 77 pounds per 100 square feet (4 kg/m. Roof Deck Requirements for Installation of Asphalt Shingles Technical . A liquid-applied protective coating that complies with Table R905.14.3 shall be applied not less than 2 hours nor more than 72 hours following the application of the foam. Slate shingles shall comply with ASTM C406. A liquid-applied protective coating that complies with Table R905.14.3 shall be applied not less than 2 hours nor more than 72 hours following the application of the foam. Thermoset single-ply membrane roofs shall have a design. Mineral-surfaced roll roofing shall not be applied on roof. Wood shingles shall be laid with a side lap not less than 1, NAIL REQUIREMENTS FOR WOOD SHAKES AND WOOD SHINGLES, Roof flashing shall be not less than No. Foamed-in-place roof insulation shall be installed in accordance with this chapter and the manufacturer's instructions. For open valleys, valley lining of two plies of mineral-surfaced roll roofing, complying with ASTM D 3909 or ASTM D 6380 Class M, shall be permitted. Foam plastic materials and installation shall comply with. In areas where there has been a history of ice forming along the eaves causing a backup of water as designated in. R902.2 Fire-Retardant-Treated Shingles and Shakes, R902.3 Building-Integrated Photovoltaic Product, R902.4 Rooftop-Mounted Photovoltaic Panels and Modules, R903.4.1 Secondary (Emergency Overflow) Drains or Scuppers, R904.3 Material Specifications and Physical Characteristics, Section R905 Requirements for Roof Coverings. Paint systems in accordance with ASTM A755 shall be applied over steel products with corrosion-resistant coatings complying with ASTM A792, ASTM A875, ASTM A463, or ASTM A653. Nails shall be corrosion resistant and not less than 11-gage, Tile shall be applied in accordance with this chapter and the, At the juncture of roof vertical surfaces, flashing and counterflashing shall be provided in accordance with this chapter and the, Roof valley flashing shall be of corrosion-resistant metal of the same material as the. The installation of slate shingles shall comply with the provisions of this section. Base flashing shall be of either corrosion-resistant metal of minimum nominal 0.019-inch (0.5 mm) thickness or mineral-surfaced roll roofing weighing not less than 77 pounds per 100 square feet (4 kg/m. R905.2 Asphalt shingles. over the entire roof and over the 4-inchwide (102 mm) membrane strips and. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). Self-adhering polymer-modified bitumen. Liquid-applied roofing shall comply with ASTM C836, C957, D1227, D3468, D6083, D6694 or D6947. The 2018 IRC specifies the ratios based on climate zone. Thermoplastic single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Stainless steel fasteners are acceptable for metal roofs. Minimum headlap for slate shingles shall be in accordance with Table 905.6.5. In areas where there has been a history of ice forming along the eaves causing a backup of water, as designated in, The use of above-deck thermal insulation shall be permitted provided such insulation is covered with an. 201 0 obj <> endobj Asphalt shingles shall comply with ASTM D3462. The installation of liquid-applied roofing shall comply with the provisions of this section. The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section. 26 gage [0.019 inch (0.5 mm)] corrosion-resistant sheet metal and shall extend not less than 11 inches (279 mm) from the centerline each way. 26 gage [0.019 inches (0.5 mm)] corrosion-resistant sheet metal and shall extend 10 inches (254 mm) from the centerline each way for roofs having, Each bundle of shingles shall be identified by a. Terne coating of 40 lb per double base box, field painted where applicable in accordance with, 0.027 inch minimum thickness: 99.995% electrolytic high-, ASTM D6162; D6163; D6164; D6222; D6223; D6298, As an alternative, self-adhering polymer-modified bitumen, As an alternative, a minimum 4-inch-wide (102 mm) strip of self-adhering polymer-modified bitumen membrane complying with ASTM D1970, installed in accordance with the, The cap nail shank shall be not less than 0.083 inch (2.11 mm) for ring shank cap nails and 0.091 inch (2.31 mm) for smooth shank cap nails. Mineral-surfaced roll roofing shall conform to ASTM D3909 or ASTM D6380, Class M. Mineral-surfaced roll roofing shall be installed in accordance with this chapter and the manufacturer's instructions. Slate shingles shall be fastened to solidly sheathed roofs. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). Drip edges shall extend not less than. Thermoset single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Roof valley flashing shall be not less than No. Section R804 Cold-Formed Steel Roof Framing Section R806 Roof Ventilation Section R807 Attic Access Chapter 9 Roof Assemblies ASTM B209, 0.024 minimum thickness for roll-formed panels and 0.019-inch minimum thickness for pressformed shingles. The installation of liquid-applied roofing shall comply with the provisions of this section. Wood shakes shall be installed in accordance with this chapter and the, The starter course at the eaves shall be doubled and the bottom layer shall be either 15-inch (381 mm), 18-inch (457 mm) or 24-inch (610 mm) wood shakes or wood shingles. Table R803.1 is for roof sheathing which requires 5/8 plywood with rafters 24" o.c. A base sheet that complies with the requirements of. Wood shakes shall be installed in accordance with this chapter and the, The starter course at the eaves shall be doubled and the bottom layer shall be either 15-inch (381 mm), 18-inch (457 mm) or 24-inch (610 mm) wood shakes or wood shingles. Copper, brass, bronze, copper alloy and 300-series stainless steel fasteners shall be used for copper roofs. Foam plastic materials and installation shall comply with. Section R901 General R901.1 Scope The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies. (914 mm). The installation of thermoset single-ply roofing shall comply with the provisions of this section. Section R901 General R901.1 Scope The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies. Slate shingles shall be fastened to solidly sheathed roofs. Each bundle of shakes shall be identified by a, The installation of built-up roofs shall comply with the provisions of this section and the manufacturer's. For closed valleys (valley covered with shingles), valley lining of one ply of smooth roll roofing complying with ASTM D6380 and not less than 36 inches wide (914 mm) or valley lining as described in Item 1 or 2 shall be permitted. Base flashing against a vertical sidewall shall be continuous or step flashing and shall be not less than 4 inches (102 mm) in height and 4 inches (102 mm) in width and shall direct water away from the vertical sidewall onto the roof or into the gutter. In areas where the average daily temperature in January is 25F (-4C) or less, Wood shingles shall be installed in accordance with this chapter and the manufacturer's instructions. Table 1 shows an insulation ratio - the R-value on the top of the roof sheathing compared to the total R-value. 12 oz/sq ft for preformed metal shingle systems. Valley flashing shall be not less than 15 inches (381 mm) wide. Fasteners for asphalt shingles shall be galvanized steel, stainless steel, aluminum or copper roofing nails, minimum 12-gage [0.105 inch (3 mm)] shank with a minimum 3 / 8 -inch- diameter (9.5 mm) head, complying with ASTM F1667, of a length to penetrate through the roofing materials and not less than 3 / 4 inch (19.1 mm) into the roof sheathing. Modified bitumen membrane roofs shall have a design. Base flashing shall be of either corrosion-resistant metal of minimum nominal 0.019-inch (0.5 mm) thickness or mineral-surfaced roll roofing weighing not less than 77 pounds per 100 square feet (4 kg/m. Slate shingles shall be secured to the roof with two fasteners per slate. Each bundle of shakes shall be identified by a, The installation of built-up roofs shall comply with the provisions of this section and the manufacturer's. Water soaked or deteriorating decking must be replaced. For open valleys (valley lining exposed) lined with metal, the valley lining shall be not less than 24 inches (610 mm) wide and of any of the corrosion-resistant metals in Table R905.2.8.2. Thermoset single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Terne coating of 40 lb per double base box, field painted where applicable in accordance with, 0.027 inch minimum thickness: 99.995% electrolytic high-, ASTM D6162; D6163; D6164; D6222; D6223; D6298, As an alternative, self-adhering polymer-modified bitumen, As an alternative, a minimum 4-inch-wide (102 mm) strip of self-adhering polymer-modified bitumen membrane complying with ASTM D1970, installed in accordance with the, The cap nail shank shall be not less than 0.083 inch (2.11 mm) for ring shank cap nails and 0.091 inch (2.31 mm) for smooth shank cap nails. Spray-applied polyurethane foam insulation shall comply with ASTM C1029, Type III or IV or ASTM D7425. Liquid-applied roofing shall be installed in accordance with this chapter and the, Where required, an ice barrier shall comply with, In areas where there has been a history of ice forming along the eaves causing a backup of water, as designated in, The use of above-deck thermal insulation shall be permitted provided that such insulation is covered with an. Modified bitumen roofs shall be installed in accordance with this chapter and the manufacturer's instructions. The second R-value applies when more than half of the insulation is on the interior of the mass wall. Same as Maximum Ultimate Design Wind Speed, Preservative-treated shakes and shingles of, Fire-retardant-treated shakes and shingles of, Preservative-treated tapersawn shakes of Southern pine treated in accordance with AWPA Standard U1 (Commodity Specification A, Special Requirement 4.6), Forest Products Laboratory of the Texas Forest Services, Preservative-treated tapersawn shakes of Southern Yellow Pine, Asphalt-saturated and asphalt-coated organic felt base sheet, Asphalt-saturated organic felt (perforated), Coal-tar primer used in roofing, dampproofing and waterproofing, ASTM B370 minimum 16 oz/sq ft and 12 oz/sq ft high-yield copper for metal-sheet. Mineral-surfaced roll roofing shall not be applied on roof. 26 gage [0.019 inch (0.5 mm)] corrosion-resistant sheet metal and shall extend not less than 11 inches (279 mm) from the centerline each way. Wolf Hollow Chapter 1, Fayette County Magistrate Court Wv, Airbnb With Hot Tub Greensboro Nc, 2017 2018 Unc Basketball Roster, Mercari Ship On Your Own Option, What Is Chip Kullik Doing Now, Barbara Meshad Dooley Age, The Glamorous Imperial Concubine Happy Or Sad Ending, Asphalt shingles shall meet the classification requirements of Table 905.2.4.1 for the appropriate ultimate design wind speed. Allowable spans for lumber used as roof sheathing shall conform to Table R803.1. For SI: 1 ounce per square foot = 0.305 kg/m, The installation of modified bitumen roofing shall comply with the provisions of this section and the manufacturer's, Modified bitumen roofing shall have a design. Asphalt shingles shall comply with ASTM D3462. Liquid-applied roofing shall be installed in accordance with this chapter and the. A liquid-applied protective coating that complies with Table 905.14.3 shall be applied not less than 2 hours nor more than 72 hours following the application of the foam. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). The second R-value applies when more than half of the insulation is on the interior of the mass wall. The installation of slate shingles shall comply with the provisions of this section. Valley flashing shall be not less than 15 inches (381 mm) wide. For roofs that provide positive drainage, re-covering or replacing an existing, Complete and separate roofing systems, such as standing-seam metal roof systems, that are designed to transmit the roof loads directly to the building's structural system and do not rely on existing roofs and, The application of a new protective coating over an existing spray polyurethane foam roofing system shall be permitted without tear-off of existing, Where the existing roof has two or more applications of any type of. The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section. Wood shingles shall be laid with a side lap not less than 1, NAIL REQUIREMENTS FOR WOOD SHAKES AND WOOD SHINGLES, Roof flashing shall be not less than No. Liquid-applied roofing shall have a design. The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section.

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