2018 irc roof sheathing requirements

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 0.447 m/s. Modified bitumen roofing shall comply with the standards in Table 905.11.2. Asphalt shingles shall be fastened to solidly sheathed decks. 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. The installation of asphalt shingles shall comply with the provisions of this section. IRC Section Table 301.5 Minimum Uniformly Distributed Live Loads: Roofing materials must be installed in accordance with Chapter 9 of the 2020 Minnesota Residential Code and the manufacturer's installation 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. 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. Flashing for asphalt shingles shall comply with this section. Section R803 Roof Sheathing R803.2 Wood Structural Panel Sheathing (Roof Online Note: This subsection covers plywood and OSB sheathing. Above-deck thermal insulation board shall comply with the standards in Table R906.2. over the entire roof and over the 4-inchwide (102 mm) membrane strips and. Drip edges shall extend not less than. Where required, an ice barrier shall comply with Section 905.1.2. Foam plastic materials and installation shall comply with. Spray-applied polyurethane foam insulation shall comply with ASTM C1029, Type III or IV or ASTM D7425. 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 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. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). Asphalt shingles shall be tested in accordance with ASTM D7158. R905.2.1 Sheathing requirements. The installation of liquid-applied roofing shall comply with the provisions of this section. SECTION R803 ROOF SHEATHING. The installation of wood shingles shall comply with the provisions of this section. Galvanized fasteners shall be used for steel roofs. Slate shingles shall be secured to the roof with two fasteners per slate. Sprayed polyurethane foam roofs shall have a design. Asphalt shingles shall be used only on roof slopes of two units vertical in 12 units horizontal (2:12) or greater. The installation of liquid-applied 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. 12 oz/sq ft for preformed metal shingle systems. The lecture and activity format allows participants to discuss the changes, reasons for the changes, and answer knowledge review questions. For the most common roof sheathing in our area, which is 1/2" nominal (7/16" actual) sheathing over trusses or rafters at 24" on center . The bottom layer shall be 18 inches (457 mm) and the top layer not less than 36 inches (914 mm) wide. 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. Asphalt shingles shall be fastened to solidly sheathed decks. Minimum headlap for slate shingles shall be in accordance with Table R905.6.5. Self-adhering polymer-modified bitumen. Thermoset single-ply membrane roofs shall have a design. Interpretation #: CEB-2018-10-2005-IRC-R905.2.1 Building or Fire Safety Law Interpreted 675 IAC 14-4.3, the 2005 Indiana Residential Code. Built-up roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Asphalt shingles shall be used only on roof. Thermoplastic single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Minimum headlap for slate shingles shall be in accordance with Table 905.6.5. Adjacent segments of drip edge shall be overlapped not less than 2 inches (51 mm). The installation of wood shakes 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 shingle packaging shall bear a. Asphalt shingles shall be tested in accordance with ASTM D7158. Liquid-applied roofing shall have a design. Liquid-applied roofing shall have a design. General Re-Roof Requirements . Asphalt shingle packaging shall bear a. The installation of thermoset single-ply roofing shall comply with the provisions of this section. 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. For SI: 1 foot = 304.8 mm; 1 mile per hour = 0.447 m/s. Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.5 mm) zinc coated G90. 201 0 obj <> endobj Asphalt shingle packaging shall bear a. Thermoplastic single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. Slate shingles 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. Interlayment shall comply with ASTM D226, Type I. The 2020 Minnesota Residential Code adopts the 2018 International Residential Code (IRC). Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch (0.5 mm) zinc coated G90. 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. Please see IRC Sec- Fifteen-inch (381 mm) or 18-inch (457 mm) wood shakes shall be permitted to be used for the final course at the. 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. Thermoplastic single-ply roofs shall be installed in accordance with this chapter and the manufacturer's instructions. 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. Liquid-applied roofing shall comply with ASTM C836, C957, D1227, D3468, D6083, D6694 or D6947. 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. Asphalt shingles shall be used only on roof. 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. Self-adhering polymer-modified bitumen. 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. Stainless steel fasteners are acceptable for metal roofs. Slate shingles shall be installed in accordance with this chapter and the manufacturer's instructions. 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. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). Water soaked or deteriorating decking must be replaced. Section R901 General R901.1 Scope The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies. 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. Slate shingles shall be secured to the roof with two fasteners per slate. Liquid-applied 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. Asphalt shingle packaging shall bear a. Valley flashing shall be not less than 15 inches (381 mm) wide. 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. 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. 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. References are to the 2018 International Residential Code (sections are designated as R). The installation of thermoplastic single-ply roofing shall comply with the provisions of this section. Slate shingles shall be installed in accordance with this chapter and the manufacturer's instructions. 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. Flashing and counterflashing shall be made with sheet metal.

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