Valley linings shall be installed in accordance with the manufacturer's instructions before applying shingles. Valley linings of the following types shall be permitted: For SI: 1 inch = 25.4 mm, 1 pound = 0.454 kg. Where siding is provided on the vertical sidewall, the vertical leg of the flashing shall be continuous under the siding. SECTION R802 WOOD ROOF FRAMING. Roof valley flashing shall be not less than No. 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. Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.5 mm) zinc coated G90. Interlayment shall comply with ASTM D226, Type I. 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. Flashing and counterflashing shall be made with sheet metal. R905.2.1 Sheathing requirements. The installation of slate shingles shall comply with the provisions of this section. Flashing and counterflashing shall be made with sheet metal. Slate shingles shall be fastened to solidly sheathed roofs. 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. The framing assembly incudes horizontal braces, vertical retrofit studs, and compression blocks. Liquid-applied roofing shall have a design. 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 installation of slate shingles shall comply with the provisions of this section. Self-adhering polymer modified bitumen. 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. For SI: 1 foot = 304.8 mm; 1 mile per hour = 0.447 m/s. 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. over the entire roof and over the 4-inchwide (102 mm) membrane strips and. Sprayed polyurethane foam roofs shall have a design. Valley linings shall be installed in accordance with the manufacturer's instructions before applying shingles. Water soaked or deteriorating decking must be replaced. Modified bitumen roofing shall comply with the standards in Table 905.11.2. Modified bitumen roofs shall be installed in accordance with this chapter and the manufacturer's instructions. 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. arrow_right. 2018 International Residential Code (Irc) | Icc Digital Codes 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. 2018 irc roof sheathing requirements - kazuyasu.net Table R803.1 is for roof sheathing which requires 5/8 plywood with rafters 24" o.c. Chapter 9: Roof Assemblies, 2020 Indiana Residential Code | UpCodes The installation of thermoplastic single-ply roofing shall comply with the provisions of this section. Interlayment shall comply with ASTM D226, Type I. For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s. Chapter 9: Roof Assemblies, Residential Code 2018 of Maryland | UpCodes Valley flashing shall be not less than 15 inches (381 mm) wide. Paint systems in accordance with ASTM A 755 shall be applied over steel products with corrosion-resistant coatings complying with ASTM A 792, ASTM A 875, ASTM A 463, or ASTM A 653. The installation of liquid-applied roofing shall comply with the provisions of this section. Asphalt shingle packaging shall bear a. Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. 12 oz/sq ft for preformed metal shingle systems. Valley linings shall be installed in accordance with the manufacturer's instructions before applying shingles. Interlayment shall comply with ASTM D226, Type I. Copper, brass, bronze, copper alloy and 300-series stainless steel fasteners shall be used for copper roofs. 2 RESIDENTIAL ROOFING GUIDE 2018 IRC. 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. Drip edges shall extend not less than. Slate shingles shall be fastened to solidly sheathed roofs. Liquid-applied roofing shall be installed in accordance with this chapter and the. The installation of liquid-applied 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. For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s. 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. 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. SECTION R803 ROOF SHEATHING. The installation of wood shingles shall comply with the provisions of this section. Valley flashing shall be not less than 15 inches (381 mm) wide. Where required, ice barriers shall comply with Section 905.1.2. Liquid-applied roofing shall have a design. %%EOF arrow_right. Slate shingles shall comply with ASTM C406. Thermoplastic single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Flashing for asphalt shingles shall comply with this section. Foam plastic materials and installation shall comply with. 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. Above-deck thermal insulation board shall comply with the standards in Table R906.2. Built-up roofs shall be installed in accordance with this chapter and the manufacturer's instructions. arrow_right. Spray-applied polyurethane foam insulation shall comply with ASTM C1029, Type III or IV or ASTM D7425. The installation of mineral-surfaced roll roofing shall comply with this section. 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. 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 thermoset single-ply roofing shall comply with the provisions of this section. The installation of wood shakes shall comply with the provisions of this section. hbbd```b``3@$R&5d}"uA$$X ,>,rLYfH 2o2dbO C"=Vbz CHEX/#300 k Sections of flashing shall have an end lap of not less than 4 inches (102 mm). 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 have a design. Asphalt shingles shall be used only on roof. Foamed-in-place roof insulation shall be installed in accordance with this chapter and the manufacturer's instructions. R803.1 is for lumber sheathing. 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. Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. Modified bitumen membrane roofs shall have a design. 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. 2018 International Residential Code (IRC) COPYRIGHT PREFACE EFFECTIVE USE OF THE INTERNATIONAL RESIDENTIAL CODE arrow_right CHAPTER 1 SCOPE AND ADMINISTRATION arrow_right CHAPTER 2 DEFINITIONS arrow_right CHAPTER 3 BUILDING PLANNING arrow_right CHAPTER 4 FOUNDATIONS arrow_right CHAPTER 5 FLOORS arrow_right CHAPTER 6 WALL CONSTRUCTION arrow_right Asphalt shingles shall meet the classification requirements of Table R905.2.4.1 for the appropriate ultimate design wind speed. A base sheet that complies with the requirements of. The installation of thermoset single-ply roofing shall comply with the provisions of this section. Asphalt shingles shall be fastened to solidly sheathed decks. For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s. endstream endobj startxref 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) 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. 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. The installation of wood shakes shall comply with the provisions of this section. Drip edges shall extend not less than. 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. Thermoplastic single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Sprayed polyurethane foam roofs shall have a design. Slate shingles shall comply with ASTM C406. 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. 3. The installation of liquid-applied roofing shall comply with the provisions of this section. The installation of wood shakes shall comply with the provisions of this section. Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.5 mm) zinc coated G90. Sprayed polyurethane foam roofs shall have a design. 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. 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. Valley flashing shall be not less than 15 inches (381 mm) wide. The installation of wood shakes shall comply with the provisions of this section. 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. Spaced lumber decking CoL Refer to the manufacturer's technical bulletin regarding requirements for existing deck boards. Self-adhering polymer-modified bitumen. 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. 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 Section 703.8.2.2. The 4-inch-wide (102 mm) strips of self-adhering polymer-modified-bitumen membrane 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 R803 Roof Sheathing R803.2 Wood Structural Panel Sheathing (Roof Online Note: This subsection covers plywood and OSB sheathing. The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section. 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. ASTM B209, 0.024 minimum thickness for roll-formed panels and 0.019-inch minimum thickness for pressformed shingles. R905.2.2 Slope. 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. Built-up roofs shall be installed in accordance with this chapter and the manufacturer's instructions. The GAF VersaShield Fire-Resistant Roof Deck Protection may be placed under or over the counterbattens. The installation of mineral-surfaced roll roofing shall comply with this section. Class A, B or C roofing shall be installed in, 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. 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. A base sheet that complies with the requirements of. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). Modified bitumen roofing shall comply with the standards in Table R905.11.2. 233 0 obj <>/Filter/FlateDecode/ID[<4D23A6406EEE004484C52F82EDD55E2A>]/Index[201 60]/Info 200 0 R/Length 141/Prev 323429/Root 202 0 R/Size 261/Type/XRef/W[1 3 1]>>stream Foamed-in-place roof insulation shall be installed in accordance with this chapter and the manufacturer's instructions. Lateral Bracing in Gable End Walls | Building America Solution Center Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. 2018 International Residential Code (Irc) | Icc Digital Codes Built-up roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Table R806.5 of the 2018 IRC lists the thermal insulation requirements for each assembly. the 2018 International Residential Code (IRC) simplified wall bracing requirements. The installation of thermoplastic single-ply roofing shall comply with the provisions of this section. Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. 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. . Built-up roofs shall be installed in accordance with this chapter and the manufacturer's instructions. For SI: 1 inch = 25.4 mm, 1 mile per hour = 0.447 m/s. The second R-value applies when more than half of the insulation is on the interior of the mass wall. 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. 2018 irc roof sheathing requirements. Materials and methods of application used for re-covering or replacing an existing, The structural roof components shall be capable of supporting the, Roof replacement shall include the removal of existing layers of, Flashings shall be reconstructed in accordance with. Asphalt shingles shall be fastened to solidly sheathed decks. Wood shingles shall be laid with a side lap not less than 1, Roof flashing shall be not less than No. Slate shingles shall be secured to the roof with two fasteners per slate. Spray-applied polyurethane foam insulation shall comply with ASTM C1029, Type III or IV or ASTM D7425. Liquid-applied roofing shall comply with ASTM C836, C957, D1227, D3468, D6083, D6694 or D6947. Valley linings shall be installed in accordance with the manufacturer's instructions before applying shingles. The installation of built-up roofs 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. Stainless steel fasteners are acceptable for metal roofs. 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. (R803.1) Hold-Downs and Hardware PDF Roof Deck Requirements for Installation of Asphalt Shingles Technical Slate shingles shall be installed in accordance with this chapter and the manufacturer's instructions. . Mineral-surfaced roll roofing shall not be applied on roof. Mineral-surfaced roll roofing shall not be applied on roof. 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. Chapter 9: Roof Assemblies, 2018 South Carolina Residential Code | UpCodes Install drip edges at eaves and rakes. Underlayment for asphalt shingles, clay and concrete tile, metal roof shingles, mineral-surfaced roll roofing, slate and slate-type shingles, wood shingles, wood shakes and metal roof panels shall conform to the applicable standards listed in this chapter. conditions about your roof that may limit your product choices or affect the cost of your roofing job. Self-adhering polymer-modified bitumen. Valley flashing shall be not less than 15 inches (381 mm) wide. 2018 International Residential Code (Irc) | Icc Digital Codes Asphalt Shingles R905.2 - IRC Provisions - PLRB 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. Interlayment shall comply with ASTM D226, Type I. Wood shakes shall comply with the requirements of Table R905.8.5. Section R901 General R901.1 Scope The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies. Foam plastic materials and installation shall comply with Section 316. 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. Galvanized fasteners shall be used for steel roofs. (914 mm). ASTM B209, 0.024 minimum thickness for roll-formed panels and 0.019-inch minimum thickness for pressformed shingles. 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 thermoplastic single-ply roofing shall comply with the provisions of this section. Asphalt shingle packaging shall bear a. DEWALT Building Code Reference: Based on the 2018 International
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