Interlayment shall comply with ASTM D226, Type I. 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 bottom layer shall be 18 inches (457 mm) and the top layer not less than 36 inches (914 mm) wide. Copper, brass, bronze, copper alloy and 300-series stainless steel fasteners shall be used for copper roofs. 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. Terne coating of 40 lb per double base box, field painted where applicable in accordance with, 0.027 inch minimum thickness: 99.995% electrolytic high-, ASTM D6162; D6163; D6164; D6222; D6223; D6298, As an alternative, self-adhering polymer-modified bitumen, As an alternative, a minimum 4-inch-wide (102 mm) strip of self-adhering polymer-modified bitumen membrane complying with ASTM D1970, installed in accordance with the, The cap nail shank shall be not less than 0.083 inch (2.11 mm) for ring shank cap nails and 0.091 inch (2.31 mm) for smooth shank cap nails. Mineral-surfaced roll roofing shall be fastened to solidly sheathed roofs. Slate shingles shall comply with ASTM C406. Install flashing at roof penetrations and wall intersections. 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 The installation of mineral-surfaced roll roofing shall comply with 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. 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. Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. Wood shingles shall be laid with a side lap not less than 1, Roof flashing shall be not less than No. Flashing and counterflashing shall be made with sheet metal. The installation of thermoset single-ply roofing 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. 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 siding is provided on the vertical sidewall, the vertical leg of the flashing shall be continuous under the siding. endstream endobj 202 0 obj <. Thermoplastic single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Where the existing roof or roof covering is water-soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing. Asphalt shingles shall be tested in accordance with ASTM D7158. 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. A new Footnote j 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. PDF 2018 IRC UPDATE Handout 9-1-18 - ICC the 2018 International Residential Code (IRC) simplified wall bracing requirements. arrow_right. For SI: 1 foot = 304.8 mm; 1 mile per hour = 0.447 m/s. Valley linings shall be installed in accordance with the manufacturer's instructions before applying shingles. Stainless steel fasteners are acceptable for metal roofs. 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. Install 7/16 in.-structural sheathing (OSB or plywood) on the vertical face of the gable end wall. Base and cap flashing shall be installed in accordance with manufacturer's instructions. 12 oz/sq ft for preformed metal shingle systems. 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 Liquid-applied roofing 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. Asphalt shingles shall comply with ASTM D3462. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). Asphalt shingles shall be used only on roof. Slate shingles shall comply with ASTM C406. Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. The installation of mineral-surfaced roll roofing shall comply with this section. Spray-applied polyurethane foam insulation shall comply with ASTM C1029, Type III or IV or ASTM D7425. (R803.1) Spaced lumber sheathing for wood shingle and shake roofing shall conform to the requirements of sections R905.7 and R905.8. R905.2.1 Sheathing requirements. Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.5 mm) zinc coated G90. Modified bitumen roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Foamed-in-place roof insulation shall be installed in accordance with this chapter and the manufacturer's instructions. 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. Wood shakes shall comply with the requirements of Table R905.8.5. 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. Asphalt shingles shall be fastened to solidly sheathed decks. Glenn Galvanized fasteners shall be used for steel roofs. Each bundle of shakes shall be identified by a, The installation of built-up roofs shall comply with the provisions of this section and the manufacturer's. Where siding is provided on the vertical sidewall, the vertical leg of the flashing shall be continuous under the siding. hbbd```b``3@$R&5d}"uA$$X ,>,rLYfH 2o2dbO C"=Vbz CHEX/#300 k Wood shakes shall comply with the requirements of Table R905.8.5. 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 bottom layer shall be 18 inches (457 mm) and the top layer not less than 36 inches (914 mm) wide. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). 2018 IRC. Interlayment shall comply with ASTM D226, Type I. Slate shingles shall comply with ASTM C406. 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. 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. 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. Galvanized fasteners shall be used for steel roofs. 2018 International Residential Code (Irc) | Icc Digital Codes 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 Section R901 General R901.1 Scope The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies. 2018 International Residential Code (Irc) | Icc Digital Codes Mineral-surfaced roll roofing shall be fastened to solidly sheathed roofs. 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. Galvanized fasteners shall be used for steel roofs. PDF 2021 Significant Code Changes for the IRC - National Association of The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section. The installation of liquid-applied roofing shall comply with the provisions of 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. Asphalt shingles shall be fastened to solidly sheathed decks. The bottom layer shall be 18 inches (457 mm) and the top layer not less than 36 inches (914 mm) wide. or less. 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. For roofs that provide positive drainage, re-covering or replacing an existing, Complete and separate roofing systems, such as standing-seam metal roof systems, that are designed to transmit the roof loads directly to the building's structural system and do not rely on existing roofs and, The application of a new protective coating over an existing spray polyurethane foam roofing system shall be permitted without tear-off of existing, Where the existing roof has two or more applications of any type of. 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. Self-adhering polymer modified bitumen. Asphalt shingles shall be tested in accordance with ASTM D7158. Drip edges shall extend not less than. Part III Building Planning and Construction, 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 904 and 905. Liquid-applied roofing shall have a design. The installation of wood shakes shall comply with the provisions of 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. Copper, brass, bronze, copper alloy and 300-series stainless steel fasteners shall be used for copper roofs. Asphalt shingles shall be used only on roof slopes of two units vertical in 12 units horizontal (2:12) or greater.