2018 IRC. Sprayed polyurethane foam roofs shall have a design. 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. 12 oz/sq ft for preformed metal shingle systems. 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. A minimum 4-inch-wide (102 mm) strip of selfadhering polymer-modified bitumen membrane complying with ASTM D 1970, installed in accordance with the manufacturer's instructions for the deck material, shall be applied over all joints in the roof decking. Real wood. For SI: 1 foot = 304.8 mm; 1 mile per hour = 0.447 m/s. The installation of asphalt shingles shall comply with the provisions of this section. 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. Thermoset single-ply membrane roofs shall have a design. Slate shingles shall be fastened to solidly sheathed roofs. 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. 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. Wood shakes shall comply with the requirements of Table 905.8.5. conditions about your roof that may limit your product choices or affect the cost of your roofing job. 12 oz/sq ft for preformed metal shingle systems. The second R-value applies when more than half of the insulation is on the interior of the mass wall. %%EOF 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. 2018 International Residential Code (Irc) | Icc Digital Codes The installation of asphalt shingles shall comply with the provisions of this section. 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. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). 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. Each bundle of shakes shall be identified by a. 2018 IRC Residential Building Guides for Homeowners Re-Roof - Coweta Spray-applied polyurethane foam insulation shall comply with ASTM C1029, Type III or IV or ASTM D7425. Slate shingles shall be secured to the roof with two fasteners per slate. Install a two-layer #30 felt underlayment system. The installation of wood shingles shall comply with the provisions of this section. The installation of liquid-applied roofing shall comply with the provisions of this section. Asphalt shingles shall be fastened to solidly sheathed decks. 201 0 obj <> endobj 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. Where required, ice barriers shall comply with Section 905.1.2. 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 905.2.8.2. Liquid-applied roofing shall comply with ASTM C836, C957, D1227, D3468, D6083, D6694 or D6947. 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. For SI: 1 foot = 304.8 mm; 1 mile per hour = 0.447 m/s. 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. The installation of built-up roofs shall comply with the provisions of this section. 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. are not required for roofs sheathed with lumber having a nominal width of less than 3 feet The installation of asphalt shingles shall comply with the provisions of this section. Where siding is provided on the vertical sidewall, the vertical leg of the flashing shall be continuous under the siding. The installation of mineral-surfaced roll roofing shall comply with this section. Asphalt shingles shall be tested in accordance with ASTM D7158. The bottom layer shall be 18 inches (457 mm) and the top layer not less than 36 inches (914 mm) wide. 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. 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. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). 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. The bottom layer shall be 18 inches (457 mm) and the top layer not less than 36 inches (914 mm) wide. Allowable spans for lumber sheathing shall conform to IRC Table R803.1. The lecture and activity format allows participants to discuss the changes, reasons for the changes, and answer knowledge review questions. Mineral-surfaced roll roofing shall not be applied on roof. Rooftop-mounted photovoltaic systems shall be installed in accordance with the manufacturer's instructions. %PDF-1.6 % 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. 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. Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. PDF 2018 International Residential Code Changes Related to Wood Construction The installation of asphalt shingles shall comply with the provisions of this section. 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. Asphalt shingles shall meet the classification requirements of Table R905.2.4.1 for the appropriate ultimate design wind speed. 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. 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. 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. Roof Sheathing Thickness | The Building Code Forum Roof penetrations shall be flashed and sealed in accordance with this chapter. A base sheet that complies with the requirements of. 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. Asphalt shingles shall be fastened to solidly sheathed decks. 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. It guides the participant through an in-depth review and analysis of the bracing requirements for wood-framed residential structures. 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. The installation of thermoset single-ply roofing shall comply with the provisions of this section. Mineral-surfaced roll roofing shall not be applied on roof. Slate shingles shall comply with ASTM C406. Self-adhering polymer-modified bitumen. 2018 irc roof sheathing requirements - kazuyasu.net Wood shakes shall comply with the requirements of Table R905.8.5. Flashing against a vertical front wall, as well as soil. The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section. Table R803.1 is for roof sheathing which requires 5/8 plywood with rafters 24" o.c. Valley flashing shall be not less than 15 inches (381 mm) wide. (R803.1) Spaced lumber sheathing is not allowed in Seismic Design Category D 2. Thermoplastic single-ply membrane roofs shall have a design. Slate shingles shall be installed in accordance with this chapter and the manufacturer's instructions. Valley linings of the following types shall be permitted: For SI: 1 inch = 25.4 mm, 1 pound = 0.454 kg. 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 -inch-diameter (9.5 mm) head, complying with ASTM F1667, of a length to penetrate through the roofing materials and not less than inch (19.1 mm) into the roof sheathing. Galvanized fasteners shall be used for steel roofs. The installation of thermoplastic single-ply roofing shall comply with the provisions of this section. Valley linings shall be installed in accordance with the manufacturer's instructions before applying shingles. 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, R902.2 Fire-Retardant-Treated Shingles and Shakes, R902.3 Building-Integrated Photovoltaic Product, R902.4 Rooftop-Mounted Photovoltaic Panel Systems, R903.4.1 Secondary (Emergency Overflow) Drains or Scuppers, R904.3 Material Specifications and Physical Characteristics, Section R905 Requirements for Roof Coverings, In areas where the average daily temperature in January is 25F (-4C) Mineral-surfaced roll roofing shall be fastened to solidly sheathed roofs. 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. Galvanized fasteners shall be used for steel roofs. Valley linings of the following types shall be permitted: For SI: 1 inch = 25.4 mm, 1 pound = 0.454 kg. The installation of wood shingles shall comply with the provisions of this section. Drip edges shall extend not less than. The installation of mineral-surfaced roll roofing shall comply with this section. Chapter 9: Roof Assemblies, Residential Code 2018 of Nevada | UpCodes Foam plastic materials and installation shall comply with. 2018 International Residential Code (Irc) | Icc Digital Codes Mineral-surfaced roll roofing shall not be applied on roof. Roof Sheathing Ring Shank nails have been added to Table R602.3(1) Fastening Schedule with the designation RSRS-01 (2-3/8" x 0.113") as an option for roof sheathing attachment. R803.1 Lumber sheathing. Asphalt shingles shall be tested in accordance with ASTM D7158. Where siding is provided on the vertical sidewall, the vertical leg of the flashing shall be continuous under the siding. 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. Roof valley 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. The installation of mineral-surfaced roll roofing shall comply with this section. Thermoplastic single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. The ratio changes based on climate severity. Where anchored masonry veneer is provided on the vertical sidewall, the base flashing shall be provided in accordance with this section and counterflashing shall be provided in accordance with, Flashing against a vertical front wall, as well as soil, A drip edge shall be provided at eaves and rake edges of shingle roofs. Asphalt shingles shall be used only on roof. Mineral-surfaced roll roofing shall be fastened to solidly sheathed roofs. Asphalt shingle packaging shall bear a. Thermoplastic single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Install flashing at roof penetrations and wall intersections. 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. 2015 IRC portion of the 2018 CT State Building Code, Part III Building Planning and Construction, R907 Rooftop-Mounted Photovoltaic Systems, R909 Rooftop-Mounted Photovoltaic Panel Systems, Chapter 13 General Mechanical System Requirements, Chapter 14 Heating and Cooling Equipment and Appliances, Chapter 19 Special Appliances, Equipment and Systems, Chapter 22 Special Piping and Storage Systems, Chapter 37 Branch Circuit and Feeder Requirements, Chapter 39 Power and Lighting Distribution, Chapter 43 Class 2 Remote-Control, Signaling and Power-Limited Circuits, Appendix A Sizing and Capacities of Gas Piping, Appendix B Sizing of Venting Systems Serving Appliances Equipped With Draft Hoods, Category I Appliances, and Appliances Listed for Use With Type B Vents, Appendix C Exit Terminals of Mechanical Draft and Direct-Vent Venting Systems, Appendix D Recommended Procedure for Safety Inspection of an Existing Appliance Installation, Appendix E Manufactured Housing Used as Dwellings, Appendix G Piping Standards for Various Applications, Appendix J Existing Buildings and Structures, Appendix T Recommended Procedure for Worst-Case Testing of Atmospheric Venting Systems Under N1102.4 or N1105 Conditions 5ACH, Appendix U Solar-Ready ProvisionsDetached One- And Two-Family Dwellings, Multiple Single-Family Dwellings (Townhouses), Appendix V Wind Speeds, Seismic Design Categories and Ground Snow Loads, The provisions of this chapter shall govern the design, materials, construction and quality of, Roofs shall be covered with materials as set forth in Sections, Flashings shall be installed in a manner that prevents moisture from entering the wall and roof through joints in copings, through moisture permeable materials and at intersections with parapet, Flashings shall be installed at wall and roof intersections, wherever there is a change in roof, A cricket or saddle shall be installed on the ridge side of any, The requirements set forth in this section shall apply to the application of, For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, In areas where there has been a history of ice forming along the eaves causing a backup of water as designated in. 2. Sprayed polyurethane foam roofs shall have a design. Mineral-surfaced roll roofing shall be fastened to solidly sheathed roofs. The installation of liquid-applied roofing shall comply with the provisions of this section. R905.2.1 Sheathing requirements. For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s. Copper, brass, bronze, copper alloy and 300-series stainless steel fasteners shall be used for copper roofs. Thermoset single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Spray-applied polyurethane foam insulation shall comply with ASTM C1029, Type III or IV or ASTM D7425. 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. Flashing and counterflashing shall be made with sheet metal. 2018 irc roof sheathing requirements. 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. Stainless steel fasteners are acceptable for metal roofs. 2018 International Building Code (Ibc) | Icc Digital Codes Copper, brass, bronze, copper alloy and 300-series stainless steel fasteners shall be used for copper roofs. Asphalt shingles shall meet the classification requirements of Table R905.2.4.1 for the appropriate ultimate design wind speed. 2018 International Residential Code (Irc) | Icc Digital Codes Self-adhering polymer-modified bitumen. The installation of mineral-surfaced roll roofing shall comply with 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. SECTION R801 GENERAL. 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. 12 oz/sq ft for preformed metal shingle systems. 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. Where anchored masonry veneer is provided on the vertical sidewall, the base flashing shall be provided in accordance with this section and counterflashing shall be provided in accordance with, Flashing against a vertical front wall, as well as soil, A drip edge shall be provided at eaves and rake edges of. 2018 International Building Code (IBC) BASIC Upgrade to Premium CHAPTER 15 ROOF ASSEMBLIES AND ROOFTOP STRUCTURES First Version: Aug 2017 All Codes I-Codes Legend Information Code Sections My Notes 2018 International Building Code (IBC) PREFACE arrow_right arrow_right arrow_right arrow_right arrow_right arrow_right arrow_right arrow_right 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. Where anchored masonry veneer is provided on the vertical sidewall, the base flashing shall be provided in accordance with this section and counterflashing shall be provided in accordance with, Flashing against a vertical front wall, as well as soil, A drip edge shall be provided at eaves and rake edges of shingle roofs. 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. The installation of wood shingles shall comply with the provisions of this section. The installation of modified bitumen roofing shall comply with the provisions of this section. Interlayment shall comply with ASTM D226, Type I. Plywood is a wood structural panel covered in R803.2.2 which points you to R503.2.1.1 There is a lot of cross over between chapters 5, 6, and 8, so don't just go with the chapter titles of floor, wall, roof. Asphalt shingles shall be used only on roof. Copper, brass, bronze, copper alloy and 300-series stainless steel fasteners shall be used for copper roofs. Sheathing Requirements R905.2.1 Asphalt shingles shall be fastened to solidly sheathed decks. Flashing and counterflashing shall be made with sheet metal. 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. Chapter 9 also provides requirements for roof drainage, flashing, above-deck thermal insulation, rooftop-mounted photovoltaic systems and recovering or replacing an existing roof covering. 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. 3. 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, but not less than four fasteners per strip shingle or two fasteners per individual shingle. 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. 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. For SI: 1 foot = 304.8 mm; 1 mile per hour = 0.447 m/s. Foam plastic materials and installation shall comply with. 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. DEWALT Building Code Reference: Based on the 2018 International