2018 irc roof sheathing requirements

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. 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. 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. 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, 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. Slate shingles shall be secured to the roof with two fasteners per slate. Thermoset single-ply roofs 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 D3909 or ASTM D6380 Class M, shall be permitted. 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. 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. Please see IRC Sec- 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. Liquid-applied roofing shall comply with ASTM C 836, C 957, D 1227, D 3468, D 6083, D 6694 or D 6947. Stainless steel fasteners are acceptable for metal roofs. Slate shingles shall be fastened to solidly sheathed roofs. Asphalt shingles shall be used only on roof. 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 1 shows an insulation ratio - the R-value on the top of the roof sheathing compared to the total R-value. 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. Valley flashing shall be not less than 15 inches (381 mm) wide. 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. Mineral-surfaced roll roofing shall be fastened to solidly sheathed roofs. Asphalt shingles shall comply with ASTM D3462. arrow_right. The installation of liquid-applied 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, 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) 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. Roof valley flashing shall be not less than No. It guides the participant through an in-depth review and analysis of the bracing requirements for wood-framed residential structures. Valley flashing shall be not less than 15 inches (381 mm) wide. 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. The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section. 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. Valley linings of the following types shall be permitted: For SI: 1 inch = 25.4 mm, 1 pound = 0.454 kg. Glenn The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section. 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. Asphalt shingles shall comply with ASTM D3462. Asphalt shingles shall be used only on roof. %%EOF 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. 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. 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. Roofing materials must be installed in accordance with Chapter 9 of the 2020 Minnesota Residential Code and the manufacturer's installation Asphalt shingles shall be fastened to solidly sheathed decks. Copper, brass, bronze, copper alloy and 300-series stainless steel fasteners shall be used for copper roofs. 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. 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. Spray-applied polyurethane foam insulation shall comply with ASTM C1029, Type III or IV or ASTM D7425. R803.1 is for lumber sheathing. (R803.1) Spaced lumber sheathing for wood shingle and shake roofing shall conform to the requirements of sections R905.7 and R905.8. over the entire roof and over the 4-inchwide (102 mm) membrane strips and. Valley flashing shall be not less than 15 inches (381 mm) wide. See Table R503.2.1.1 for minimum allowable panel thickness by span and load.) Wood shakes shall comply with the requirements of Table R905.8.5. Modified bitumen roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Flashing and counterflashing shall be made with sheet metal. 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. 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. Interlayment shall comply with ASTM D226, Type I. 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. ASTM B209, 0.024 minimum thickness for roll-formed panels and 0.019-inch minimum thickness for pressformed shingles. Mineral-surfaced roll roofing shall conform to ASTM D 3909 or ASTM D 6380, Class M. Mineral-surfaced roll roofing shall be installed in accordance with this chapter and the manufacturer's instructions. Base and cap flashing shall be installed in accordance with manufacturer's instructions. Thermoset single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. The installation of thermoplastic single-ply roofing shall comply with the provisions of this section. Asphalt shingles shall meet the classification requirements of Table R905.2.4.1 for the appropriate ultimate design wind speed. 2018 IRC. Where exterior plaster or adhered masonry veneer is provided on the vertical sidewall, the base flashing shall be provided in accordance with this section and Section 703.6.3. Section R804 Cold-Formed Steel Roof Framing Section R806 Roof Ventilation Section R807 Attic Access Chapter 9 Roof Assemblies Galvanized fasteners shall be used for steel roofs. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). Above-deck thermal insulation board shall comply with the standards in Table R906.2. Asphalt shingles shall be used only on roof. 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. Spaced lumber decking CoL Refer to the manufacturer's technical bulletin regarding requirements for existing deck boards. Wood shakes shall comply with the requirements of Table 905.8.5. 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 Sprayed polyurethane foam roofs shall have a design. 0 Flashing and counterflashing shall be made with sheet metal. 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. are not required for roofs sheathed with lumber having a nominal width of less than 3 feet Water soaked or deteriorating decking must be replaced. For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s. R905.2.1 Sheathing requirements. 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. Asphalt shingles shall be used only on roof slopes of two units vertical in 12 units horizontal (2:12) or greater. Exception: Detached accessory structures not containing conditioned floor area. 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. The installation of thermoset single-ply roofing shall comply with the provisions of this section. Nominally, 2-by- In areas where there has been a history of ice forming along the eaves causing a backup of water as designated in. For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s. Galvanized fasteners shall be used for steel roofs. 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. The framing assembly incudes horizontal braces, vertical retrofit studs, and compression blocks. 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. Asphalt shingle packaging shall bear a. 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. Brace gable end walls taller than 48. inches in height to resist wind forces by installing a framing assembly at each gable wall stud. The GAF VersaShield Fire-Resistant Roof Deck Protection may be placed under or over the counterbattens. 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 modified bitumen roofing 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. 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. Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.5 mm) zinc coated G90. 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. A base sheet that complies with the requirements of. Thermoplastic single-ply roofs 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. 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. Section R901 General R901.1 Scope The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies. The installation of wood shingles shall comply with the provisions of this section. The installation of asphalt shingles shall comply with the provisions of this section. Mineral-surfaced roll roofing shall not be applied on roof. Slate shingles shall be secured to the roof with two fasteners per slate. Flashing against a vertical front wall, as well as soil. 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. On roofs with slope equal to or greater than eight units vertical in 12 units horizontal (67-percent slope), the ice barrier shall also be applied not less than 36 inches (914 mm) measured along the roof slope from the eave edge of the building. 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. Mineral-surfaced roll roofing shall be fastened to solidly sheathed roofs. The installation of thermoset single-ply roofing shall comply with the provisions of this section. 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. Flashing for asphalt shingles shall comply with this section. 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. Galvanized fasteners shall be used for steel roofs. The installation of wood shakes shall comply with the provisions of this section. Modified bitumen roofing shall comply with the standards in Table R905.11.2. Part III Building Planning and Construction, R907 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 [RE] Solar-Ready ProvisionsDetached One- And Two-Family Dwellings and Townhouses, 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, ASTM D6380 Class M mineral-surfaced roll roofing. 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, 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. 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. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). 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. Built-up roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.5 mm) zinc coated G90. Slate shingles shall comply with ASTM C406. Part III Building Planning and Construction, R907 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 [RE] Solar-Ready ProvisionsDetached One- And Two-Family Dwellings and Townhouses, 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, ASTM D6380 Class M mineral-surfaced roll roofing. The installation of wood shingles shall comply with the provisions of this section. Roof valley flashing shall be not less than No. 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 base sheet that complies with the requirements of. 12 oz/sq ft for preformed metal shingle systems. 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. 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. The installation of wood shakes shall comply with the provisions of this section. Modified bitumen roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Stainless steel fasteners are acceptable for metal roofs. Slate shingles shall comply with ASTM C406. Foamed-in-place roof insulation shall be installed in accordance with this chapter and the manufacturer's instructions. arrow_right. For SI: 1 ounce per square foot = 0.305 kg/m. Self-adhering polymer-modified bitumen. Wood shakes shall comply with the requirements of Table R905.8.5. About this chapter: Chapter 10 contains requirements for the construction, seismic reinforcing and anchorage of masonry chimneys and fireplaces; and establishes standards for the use and installation of factory-built chimneys, fireplaces and masonry heaters. The ratio changes based on climate severity. Self-adhering polymer-modified bitumen. Valley linings of the following types shall be permitted: For SI: 1 inch = 25.4 mm, 1 pound = 0.454 kg. Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. Real wood. Thermoset single-ply membrane roofs shall have a design. the 2018 International Residential Code (IRC) simplified wall bracing requirements. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). 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. Stainless steel fasteners are acceptable for metal roofs. 2 RESIDENTIAL ROOFING GUIDE 2018 IRC. The lecture and activity format allows participants to discuss the changes, reasons for the changes, and answer knowledge review questions. Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. Install a two-layer #30 felt underlayment system. 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. Where the existing roof covering is slate, clay, cement or asbestos-cement tile. 3. The bottom layer shall be 18 inches (457 mm) and the top layer not less than 36 inches (914 mm) wide. 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. Slate shingles shall be installed in accordance with this chapter and the manufacturer's instructions.

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