Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.5 mm) zinc coated G90. over the entire roof and over the 4-inchwide (102 mm) membrane strips and. Where the existing roof has two or more applications of any type of roof . Flashing against a vertical front wall, as well as soil. Asphalt shingle packaging shall bear a. The 2018 IRC specifies the ratios based on climate zone. For SI: 1 foot = 304.8 mm; 1 mile per hour = 0.447 m/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. The installation of wood shakes 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. Adjacent segments of drip edge shall be overlapped not less than 2 inches (51 mm). 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. Minimum headlap for slate shingles shall be in accordance with Table R905.6.5. Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.5 mm) zinc coated G90. Flashing and counterflashing shall be made with sheet metal. The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section. Liquid-applied roofing shall comply with ASTM C836, C957, D1227, D3468, D6083, D6694 or D6947. CONTINUE WITH CODE REQ'S 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. Interlayment shall comply with ASTM D226, Type I. A base sheet that complies with the requirements of Section 1507.11.2 of the. 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. Self-adhering polymer modified bitumen. Asphalt shingles shall be tested in accordance with ASTM D7158. The installation of wood shingles shall comply with the provisions of this section. Minimum headlap for slate shingles shall be in accordance with Table R905.6.5. Mineral-surfaced roll roofing shall not be applied on roof. Real wood. The installation of asphalt shingles shall comply with the provisions of this section. Slate shingles shall be secured to the roof with two fasteners per slate. 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. Thermoplastic single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. The bottom layer shall be 18 inches (457 mm) and the top layer not less than 36 inches (914 mm) wide. The installation of thermoplastic single-ply roofing shall comply with the provisions of this section. A new Footnote j R905.2.4.1 Wind Resistance of Asphalt Shingles, R905.14 Sprayed Polyurethane Foam Roofing, Section R907 Rooftop-Mounted Photovoltaic Systems, R907.1 Rooftop-Mounted Photovoltaic Systems, Section R909 Rooftop-Mounted Photovoltaic Panel Systems, Building-integrated photovoltaic products. Liquid-applied roofing shall be installed in accordance with this chapter and the manufacturer's instructions. Copper, brass, bronze, copper alloy and 300-series stainless steel fasteners shall be used for copper roofs. Spray-applied polyurethane foam insulation shall comply with ASTM C1029, Type III or IV or ASTM D7425. 1. Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.5 mm) zinc coated G90. Asphalt shingles shall comply with ASTM D3462. For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s. The installation of wood shingles shall comply with the provisions of this section. Galvanized fasteners shall be used for steel roofs. or less, R905.2.4.1 Wind Resistance of Asphalt Shingles, R905.14 Sprayed Polyurethane Foam Roofing, R905.17 Building-Integrated Photovoltaic (BIPV) Roof Panels Applied Directly to the Roof Deck, Section R907 Rooftop-Mounted Photovoltaic Panel Systems, R907.1 Rooftop-Mounted Photovoltaic Panel Systems, Building-integrated photovoltaic products. Modified bitumen membrane roofs shall have a design. 2018, 2021 IECC: Mass walls shall be in accordance with Section R402.2.5 (N1102.2.5 in 2018 IRC). For open valleys, valley lining of two plies of mineral-surfaced roll roofing, complying with ASTM D3909 or ASTM D6380 Class M, shall be permitted. Where siding is provided on the vertical sidewall, the vertical leg of the flashing shall be continuous under the siding. Slate shingles 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. 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. Roof valley flashing shall be not less than No. 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. 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. Interlayment shall comply with ASTM D226, Type I. Spray-applied polyurethane foam insulation shall comply with ASTM C1029, Type III or IV or ASTM D7425. The installation of slate shingles shall comply with the provisions of this section. Valley linings shall be installed in accordance with the manufacturer's instructions before applying shingles. Slate shingles shall be fastened to solidly sheathed roofs. %PDF-1.6 % In areas where there has been a history of ice forming along the eaves causing a backup of water as designated in. Install flashing at roof penetrations and wall intersections. or less. 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. R803.1 is for lumber sheathing. Each bundle of shakes shall be identified by a. Same as Maximum Ultimate Design Wind Speed, 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. 2018 irc roof sheathing requirements. Asphalt shingles shall be tested in accordance with ASTM D7158. Cap nail shank shall have a length sufficient to penetrate through the roof sheathing or not less than, The standard calculations contained in ASTM D7158 assume Exposure Category B or C and a. 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. satisfy the requirements of 2021 IBC Section 1512, 2018 and 2015 IBC Section 1511, 2012, 2009 and 2006 IBC Section 1510, 2018 and 2021, 2018 and 2015 IRC Section R908 or 2012, 2009 or 2006 IRC Section R907. Wood shakes shall comply with the requirements of Table R905.8.5. . Galvanized fasteners shall be used for steel roofs. 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. Modified bitumen roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Liquid-applied roofing shall have a design. 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. 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. Section R804 Cold-Formed Steel Roof Framing Section R806 Roof Ventilation Section R807 Attic Access Chapter 9 Roof Assemblies Above-deck thermal insulation board shall comply with the standards in Table R906.2. Valley linings of the following types shall be permitted: For SI: 1 inch = 25.4 mm, 1 pound = 0.454 kg. For SI: 1 foot = 304.8 mm; 1 mile per hour = 0.447 m/s. (R803.1) Spaced lumber sheathing is not allowed in Seismic Design Category D 2. Foamed-in-place roof insulation shall be installed in accordance with this chapter and the manufacturer's instructions. Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. 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. Foam plastic materials and installation shall comply with. Same as Maximum Ultimate Design Wind Speed, Apply in accordance with the manufacturer's, Asphalt-saturated and asphalt-coated organic felt base sheet, Asphalt-saturated organic felt (perforated), Coal-tar primer used in roofing, dampproofing and waterproofing, ASTM B 370 minimum 16 oz/sq ft and 12 oz/sq ft high-yield copper for metal-sheet, ASTM B 209, 0.024 minimum thickness for roll-formed panels and 0.019-inch minimum, 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-, As an alternative, self-adhering polymer-modified bitumen, The standard calculations contained in ASTM D 7158 assume Exposure Category B or C and. endstream endobj 202 0 obj <. Table R806.5 of the 2018 IRC lists the thermal insulation requirements for each assembly. ASTM B209, 0.024 minimum thickness for roll-formed panels and 0.019-inch minimum thickness for pressformed shingles. Valley flashing shall be not less than 15 inches (381 mm) wide. Sprayed polyurethane foam roofs shall have a design. Adjacent segments of drip edge shall be overlapped not less than 2 inches (51 mm). 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. 0 For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s. Drip edges shall extend not less than. 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 thermoplastic single-ply roofing shall comply with the provisions of this section. Materials and methods of application used for recovering or replacing an existing, The structural roof components shall be capable of supporting the, Flashings shall be reconstructed in accordance with, Chapter 9 addresses the design and construction of, The 24 inch measurement shall be along the, Building-integrated photovoltaic products. Slate shingles shall be secured to the roof with two fasteners per slate. Cap nail shank shall have a length sufficient to penetrate through the roof sheathing or not less than, The standard calculations contained in ASTM D7158 assume Exposure Category B or C and a. Table R803.1 is for roof sheathing which requires 5/8 plywood with rafters 24" o.c. 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. Galvanized fasteners shall be used for steel roofs. The bottom layer shall be 18 inches (457 mm) and the top layer not less than 36 inches (914 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, Asphalt shingles shall have the minimum number of fasteners required by the manufacturer's. The installation of wood shingles 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. The installation of wood shingles shall comply with the provisions of this section. Slate shingles shall comply with ASTM C406. Slate shingles shall be installed in accordance with this chapter and the manufacturer's instructions. Modified bitumen roofs shall be installed in accordance with this chapter and the manufacturer's instructions. R905.2.1 Sheathing requirements. IRC Section Table 301.5 Minimum Uniformly Distributed Live Loads: Slate shingles shall comply with ASTM C406. 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. Stainless steel fasteners are acceptable for metal roofs. 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. Mineral-surfaced roll roofing shall not be applied on roof. The lecture and activity format allows participants to discuss the changes, reasons for the changes, and answer knowledge review questions. Modified bitumen roofing shall comply with the standards in Table R905.11.2. Asphalt shingles shall be fastened to solidly sheathed decks. 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. 201 0 obj <> endobj Slate shingles shall be installed in accordance with this chapter and the manufacturer's instructions.
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