Highlight differences between any two building codes. And if you're still wondering what roof sheathing is and what materials are typically used, read on and satisfy your curiosity. Quickly locate sections across your jurisdiction. Install sheathing perpendicular to roof trusses one slope at a time. FS No. The thickness of the deck shall be 7/16 of an inch to 5/8 of an inch thick and fastened using 8d common nails, 10d box or power-driven nails. The Ontario Building Code | Thickness or Rating 9.23.15.7. Typical types of wood used for roof sheathing are oriented strand board, known as OSB, and plywood, the most popular being OSB. The thickness required by Josh’s circumstances are good for roof snow loads of up to 70 psf (again spanning 24”). Typical rafter-spacing codes will specify a minimum spacing of 16 inches, 19.2 inches or 24 inches. Building Codes for roofing reqiure a minimum 1x4, and the spaces between battens should not exceed 3 1/2 inches (Figure 2-46 - wood shingles over spaced sheathing, and Figure 2-47 wood shakes installed over wood sheathing are illustrated below). Welcome to the new and improved Building Code Forum. Chapter 4101:8-9 Roof Assemblies. Span is permitted to be 24 inches on center where, Span is permitted to be 24 inches on center for floors where 1. In some parts of the country, they still use 1X boards for the decking. He says it all has to be torn off and replaced with plywood. Roof sheathing conforming with this table shall be deemed to meet the design criteria of Section 2304.7. The first envelope components (i.e., the roof covering and roof underlayment) are typically . Spacer-type panel edge clips are … Any feedback would be appreciated. The IBC code further states in Section 1609.5.1 Roof deck, that the deck must be designed and installed in accordance with ASCE 7. Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter. 7.3.1 Roof Sheathing. Related State Statutes . [Comment: When a reference is made within this rule to a federal statutory provision, an industry consensus standard, or any other technical publication, the specific date and title of the publication as well as the name and address of the promulgating agency are listed in rule 4101:8-44-01 of the Administrative Code. Ladder framing at gable ends. Building Codes for roofing reqiure a minimum 1x4, and the spaces between battens should not exceed 3 1/2 inches (Figure 2-46 - wood shingles over spaced sheathing, and Figure 2-47 wood shakes installed over wood sheathing are illustrated below). The cap nail shank shall be not less than 0.083 inch for ring shank cap nails and 0.091 inch for smooth shank cap nails. The most common rafter spacing is 24 inches, and 5/8-inch plywood is recommended for that. Unless noted otherwise in this information bulletin, a building permit is not required for renewal of roof coverings on any building permitted by the California Building Code and the California Residential Code, where the existing roof structure, including roof Take the roof's total square footage and divide by 32. For SI: 1 inch = 25.4 mm, 1 pound per square foot = 0.0479 kN/m, 2304.8.1 Wood, Structural Floor Sheathing, 710.4 Fire and Smoke Protection Features, Continuity, Installation details shall conform to Sections. Several factors must be considered when determining appropriate roof sheathing thickness, such as the span of roof joists and snow load for the area. code or matching the existing roof sheathing nailing, whichever is more restrictive. for subfloors. Roof sheathing is the first structural component in the load path between the roof system and the foundation. Floor and roof sheathing conforming with this table shall be deemed to meet the design criteria of Section 2304.7. She specializes in human and animal health issues, gardening and crafts. If it is not 24 inches then it would not meet the presrciptive requirements of the IRC For information on large panelized roof systems, refer to the Commercial Construction application section. Never attach roof sheathing with staples; 8d ring-shank nails should be used instead. edition of the Residential Code of New York State. SPS 321.27(9)(b)2. If asphalt shingles are installed over sheathing with gaps exceeding 1/4-inch, over time, these gaps may telegraph through and become visible. Roof sheathing is the first structural component in the load path between the roof system and the foundation. You should be prepared to have about 15 percent waste, so multiply your figure by 1.15. Also covers wood panel (plywood, OSB) roof sheathing requirements.) Minimum Roof Sheathing Thickness (excerpt) Roof Sheathing Thickness Rafter/Truss Spacing 24 in. Roof Sheathing Materials Plywood. Many homes have been severely Code calculators automatically generate a detailed list of requirements. Don't miss relevant code. There is code to the span of rafter/joist/stud that will dictate minimums. Half-inch is rated for a 32" span in the same application. Also covers wood panel (plywood, OSB) roof sheathing requirements.) TABLE R803.1. Section R801 General. Thickness or Rating (1) The thickness or rating of roof sheathing on a flat roof used as a walking deck shall conform to either Table 9.23.14.5.A. This can be done with a straight piece of lumber (6 feet to … Exception: As an alternative, adhered underlayment complying with ASTM D 1970 shall be permitted. At my expense of course. For SI: 1 inch = 25.4 mm. Jim, I'm not sure of the particulars of your local building codes, but it might be of value for you to look over the APA E30 documents for roofing panels. For SI: 1 inch = 25.4 mm. MINIMUM THICKNESS OF LUMBER ROOF SHEATHING FS No. Roof sheathing conforming to the provisions of Table 2304.7(1) , 2304.7 (2), 2304.7 (3) or 2304.7 (5) shall be deemed to meet the requirements of this section. Tables with important factors can be found in a book called "Structural Design in Wood," written by Judith J. Stalnaker and Earnest C. Harris. Roof Sheathing Panel Spacing Hints: Use a 10d box (0.128-inch-by-3-inch) nail as a spacer to gauge 1/8-inch edge and end spacing between panels. or Table 9.23.14.5.B. (For clarity, sheathing nails are not shown.) Until that time, Reference Standard E-30 is to be utilized for selection of roof and floor plywood sheathing. A strong, resilient roof is a home’s first line of defense when the roof deck is exposed to weather. Roof sheathing shall be structural wood panels (plywood, OSB) with a minimum five-eighths inch thickness, grade stamped for use and span. Sheathing should be a minimum of 19/32-inch thick. The code includes several specific excep - tions to its roof system removal and replace - The typical thickness range for sheathing is 3/8 to 3/4 inch. What H-Clips Do. The typical thickness range for sheathing is 3/8 to 3/4 inch. Code Recognition for Florida Building Code Roofing Underlayment ZIP System Roof Sheathing | ER-424. ing roof coverings; and when the existing roof system is wet or deteriorated to the point it will not be a suitable substrate. Secure roof sheathing panels to the roof framing with 8d common nails, spaced six inches on center at the edges and … Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of Section 2304.7. Roof decks shall be covered with approved roof coverings secured to the building or structure in accor-dance with the provisions of this chapter. By creating an account you agree to the Hunker. Rafters must be strong enough to hold the roof sheathing and the shingles. Generate a code sheet that integrates with your drawing set. Step 4: Cover sheathing with shingle underlayment felt to minimize roof sheathing exposure to weather, unless otherwise recommended by sheathing manufacturer. However, there IS a common reason to upgrade the thickness of the roof sheathing as explained above. Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter. 1 inch (25.4 mm) with a thickness of at least 32-gauge sheet metal. Contains sections covering roof framing, roof sheathing, and roof ventilation. ¾ plywood is a favorite for some as … Re: Minimum sheathing requirements for composition shingles? At minimum I prefer a ½ sheet for 16” OC framing, while others I know will go no less than 5/8 or ¾. Until that time, Reference Standard E-30 is to be utilized for selection of roof and floor plywood sheathing. The requirement became effective on October 1, 2007. Panel thickness will also affect permeability - using the 2 perm variable of 7/16ths OSB sheathing, at 3/4" thickness the permeability drops to 2/3rds of a perm. Recently had hail damage to my asphalt shingles. o.c. Minimum Roof Sheathing Thickness (excerpt) Roof Sheathing Thickness Rafter/Truss Spacing 24 in. Allowable spans for lumber used as roof sheathing shall conform to Table R803.1. Start the sheathing at the eaves and work your way up to 1 inch from the peak. 4101:8-9-01 Roof assemblies. This is largely regional though, so check with your local building code department. Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof. Due to market pressures the 1/2" may actually cost less than the 3/8" and will be stronger. ER-424 provides information on the description, uses and code compliance of ZIP System Roof Sheathing with the Florida Building Code. Minimum 270 Fb, 340,000 E. Minimum 420 Fb, 660,000 E. Minimum 600Fb, 1,150,000 E. R903.1 General. Where the roofsheathingislessthan 3/ 4 inch(19mm)thick,thefasteners non-structural and are discussed in detail in Chapter 8, Roof Covering and Best Practices. non-structural and are discussed in detail in Chapter 8, Roof Covering and Best Practices. Roof sheathing comes in grid-marked 4-by-8-foot sheets, and should be installed perpendicular to the frame. o.c. Code Calculators automatically generates a detailed list of requirements. Always Check for a Level Nailing Surface. When you replace a roof on a home that was built before the implementation of the statewide Florida Building Code on March 1, 2002, the nailing of the roof sheathing (decking) must be brought up to current standards for hurricane resistance as part of the installation of the new roof. Adopted Building Codes . edition of the Residential Code of New York State. Roof Sheathing Thickness. APA E30-01, American Plywood Association, Engineered Wood Construction Guide, E-30 indicates that 7/16" OSB for roof sheathing with supports @ 24" o.c. For rafters spaced 20 or more inches apart, 1/2- or 5/8-inch plywood is recommended. the roof ridge by nailing roof sheathing. He says it is not up to code and he has no choice. ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and resilient structures. It is important to check the local building codes for your area as well. The correction recommended by manufacturers is installation of an additional layer of 3/8-inch minimum exterior-grade plywood or OSB roof sheathing on top of the original wood-board roof sheathing. The cap-nail shank shall be a minimum of 12 gauge (0.105 inches) with a length to penetrate through the roof sheathing or a minimum of3/ 4-inch (19 mm) into the roof sheathing. See Table R503.2.1.1 for minimum allowable panel thickness by span and load.) ROOF SHEATHING FASTENING SCHEDULEa,b,c,d,e 8d Common (0.131 x 2-1/2 inches) or Ring-Shank (0.135 x 2-1/2 inches) (Except Where Noted) for Exposure B, Enclosed Buildings, Roof Framing Spaced 24 inches o.c. ALL OSB with the same span ratings have to meet the same criteria regardless of what brand it is. Structural roof sheathing shall be designed in accordance with the general provisions of this code and the special provisions in this section. If the roof dips here and there because of the thin plywood the 1/8 jump may no be so bad in the mix of it all – Jack Jul 26 '16 at 4:24 Sheets of 7/16-inch thick, with no edge support, can be used in an area where the snow load is 30 pounds per square foot. 4101:8-9-01 Roof assemblies. The correction recommended by manufacturers is installation of an additional layer of 3/8-inch minimum exterior-grade plywood or OSB roof sheathing on top of the original wood-board roof sheathing. Structural floor sheathing shall be designed in accordance with the general provisions of this code and the special provisions in this section. The Ontario Building Code | Thickness, Rating and Material Standards 9.23.16.2. Section R801 General. ZIP System roof assembly combines our revolutionary integrated sheathing and flashing tape or liquid flashing to provide a sealed roof for protection against moisture intrusion during construction or if high winds strip the roof covering away. It spans the rafters to support the roofing and, in the case of panel sheathing such as plywood or OSB, it acts as a diaphragm with the walls to resist horizontal loads. Cap nail shank shall have a length sufficient to penetrate through the roof sheathing or not less than 3/4 inch into the roof sheathing. The National Building Code of Canada 2005, has now clearly – without doubt – defined that a deck area IS considered a ROOF, and that the only acceptable Standard for PVC membranes is CGSB-37.54-95. Leverage the most sophisticated code compliance platform. If your local building authority has a rafter-spacing code, you may not space rafters wider than required by code. SECTION 1503 WEATHER PROTECTION 1503.1 General. Chapter 4101:8-9 Roof Assemblies. Proposed Rules 17. Correct installation of roof sheathing will ensure the best performance and help reduce complaints and callbacks. The IBC code further states in Section 1609.5.1 Roof deck, ... the nails shall penetrate through the sheathing. Common roof sheathing applications and installation recommendations are described in the related publications listed at right. A reliable and up-to-date source of codes. Is 1/2" osb okay for a standing seam roof ( and other roofing materials ) or is 5/8" preferred? When roof system removal is required, the code stipu - lates all layers of existing roof systems need to be removed down to the deck. Roof sheathing comes in grid-marked 4-by-8-foot sheets, and should be installed perpendicular to the frame. Jump to Latest Follow 1 - 9 of 9 Posts ... hmmm, dunno code, but i'd be concerned about snow weight. Building Codes: 2018 International Residential Code: Chapter 9 Roof Assemblies. The cap-nail shank shall be a minimum of 12 gauge (0.105 inches) with a length to penetrate through the roof sheathing or a minimum of3/ 4-inch (19 mm) into the roof sheathing. Roof will be fully vented. Floor sheathing conforming to the provisions of, Roof sheathing conforming to the provisions of, Smoke partitions shall extend from the top of the foundation or. or Less Roof Fastening Zone Wind Main Sheathing-to-Gable- Overhang Velocity Roof End-Wall Framingg (eaves) (3-Second Panel 123 2 3 2 3 longevity of your new roof: Roof Sheathing Preparation (for com-plete tear offs): • The roof sheathing must provide a ... etrate through the total thickness of the roofing and a minimum of 3/4” into ... additional code requirements may apply. Recent Rulings . 7.3.1 Roof Sheathing. Nails, size 8b, should be installed every 6 inches on edges and every 12 inches in the center area. Unless noted otherwise in this information bulletin, a building permit is not required for renewal of roof coverings on any building permitted by the California Building Code and the California Residential Code, where the existing roof structure, including roof Section R803 Roof Sheathing. 18. The most common rafter spacing is 24 inches, and 5/8-inch plywood is recommended for that. On the UpCodes website. Minimum 270 Fb, 340,000 E. Minimum 420 Fb, 660,000 E. Minimum 600Fb, 1,150,000 E. R903.1 General. Be sure to stagger the vertical seams; every other course will start with a 4-by-4-foot sheet of OSB or plywood. be designed and installed in accordance with this code and the ... THICKNESS (INCHES) GAGE WEIGHT (lbs per sq ft) Copper 0.024 1 (16 oz) Aluminum 0.024 Stainless steel 28 ... 4 inch (19 mm) into the roof sheathing. Thickness, Rating and Material Standards (1) Where wall sheathing is required for the purpose of complying with this Section, it shall conform to Table 9.23.16.2.A. Projects provide a dedicated space to collaborate on code research. TABLE 2304.7(1) ALLOWABLE SPANS FOR LUMBER FLOOR AND ROOF SHEATHINGa, b, TABLE 2304.7(2) SHEATHING LUMBER, MINIMUM GRADE REQUIREMENTS: BOARD GRADE, TABLE 2304.7(3) ALLOWABLE SPANS AND LOADS FOR WOOD STRUCTURAL PANEL SHEATHING AND SINGLE-FLOOR GRADES CONTINUOUS OVER TWO OR MORE SPANS WITH STRENGTH AXIS PERPENDICULAR TO SUPPORTSa, b, TABLE 2304.7(4) ALLOWABLE SPAN FOR WOOD STRUCTURAL PANEL COMBINATION SUBFLOOR-UNDERLAYMENT (SINGLE FLOOR)a, b (Panels Continuous Over Two or More Spans and Strength Axis Perpendicular to Supports), TABLE 2304.7(5) ALLOWABLE LOAD (PSF) FOR WOOD STRUCTURAL PANEL ROOF SHEATHING CONTINUOUS OVER TWO OR MORE SPANS AND STRENGTH AXIS PARALLEL TO SUPPORTS (Plywood Structural Panels Are Five-Ply, Five-Layer Unless Otherwise Noted)a, b. Hunker may earn compensation through affiliate links in this story. Section R803 Roof Sheathing. Structural roof sheathing shall be designed in accordance with the general provisions of this code and the special provisions in this section. Minimum thickness of the outside edge of plastic caps shall be 0.035 inch. ICC Digital Codes is the largest provider of model codes, custom codes and standards used worldwide to construct safe, sustainable, affordable and resilient structures. Get everyone on the same page and streamline code research. My cabin trusses will be 24" oc and I will use either 1/2" or 5/8" osb sheathing and a standing seam metal roof. Mostly 1x6's. This will give you the total number of sheets to buy. 2. Sad but true... Nope it is not customary to mix, but in this case it may be a good idea. Exception: As an alternative, adhered underlayment complying with ASTM D … or Table 9.23.16.2.B. Leverage the full code compliance platform. With edge support and the same snow load, 3/8-inch OSB can be used. It spans the rafters to support the roofing and, in the case of panel sheathing such as plywood or OSB, it acts as a diaphragm with the walls to resist horizontal loads. Building Codes: 2018 International Residential Code: Chapter 8 Roof-Ceiling Construction. Plywood's Advantage over OSB? If asphalt shingles are installed over sheathing with gaps exceeding 1/4-inch, over time, these gaps may telegraph through and become visible. wall Sheathing Thickness and Specifications For rafters spaced 20 or more inches apart, 1/2- or 5/8-inch plywood is recommended. This is also one reason why you may wish to consider bumping your sheathing up past code minimums & going with a thicker panel. ... 1/2 inch sheathing on 24" centered trusses is commonly used here where snow load is 30 pounds. MINIMUM THICKNESS OF LUMBER ROOF SHEATHING. The cap nail shank shall be a minimum of 12 gage [ 0.105 inch ( 2.67 mm)] with a length to penetrate through the roof sheathing or a minimum of ¾ inch ( 19.1 mm) into the roof sheathing. Kimberly Hawthorne has been writing since 1980, currently contributing to various websites. Codes & Rules . 1 inch (25.4 mm) with a thickness of at least 32-gauge sheet metal. With over 11 years experience she is an expert in home improvement, remodeling, repairs and the tools used to get the job done right. 2. Unpack the code through illustrations and descriptions. H-clips provide additional stiffness between bearing points for the unsupported edges of wood panel (plywood or OSB) roof sheathing, along with the necessary 1/8” gap for expansion, as shown below illustrated on a bag of Simpson H-clips. Sheathing is installed perpendicular to roof trusses. When you replace a roof on a home that was built before the implementation of the statewide Florida Building Code on March 1, 2002, the nailing of the roof sheathing (decking) must be brought up to current standards for hurricane resistance as part of the installation of the new roof. That, in a nutshell, is the one big advantage plywood holds over OSB. code or matching the existing roof sheathing nailing, whichever is more restrictive. Structural floor sheathing and structural roof sheathing shall comply with Sections 2304.7.1 and 2304.7.2, respectively. 2. Please see IRC Sec-tions R905 and R908, or ask your building department for details. Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof. 18 – Roof Sheathing Installation Home Builder’s Guide to Coastal Construction 08/05 Page 2 of 3 recommended that deformed shank nails be used throughout the entire roof. or Table 9.23.15.7.B. One or more layers of felt, sheathing paper, nonbituminous saturated feltor other approved material over which a steep-slope roof covering is applied. On the UpCodes website. [Comment: When a reference is made within this rule to a federal statutory provision, an industry consensus standard, or any other technical publication, the specific date and title of the publication as well as the name and address of the promulgating agency are listed in rule 4101:8-44-01 of the Administrative Code. R803.2 Wood Structural Panel Sheathing (Roof Online Note: This subsection covers plywood and OSB sheathing. R803.2 Wood Structural Panel Sheathing (Roof Online Note: This subsection covers plywood and OSB sheathing. ) in a roof application underlayment ) are typically 32 square feet covers wood (. 2304.7.2, respectively material Standards 9.23.16.2 for a standing seam roof ( and roofing... Multiply your figure by 1.15 structural component in the load path between the roof 's total square footage divide... Er-424 provides information on large panelized roof systems, refer to the or. Divide by 32 will give you the total number of sheets to buy steep-slope covering! Sections 2304.7.1 and 2304.7.2, respectively, read on and satisfy your curiosity ladder-framed -! Recognition for Florida building code Forum Q & a titles that address roof sheathing comes in grid-marked 4-by-8-foot sheets and! Past code minimums & going with a thicker panel lumber roof sheathing roof sheathing applications and installation are. Minimum thickness of lumber ( 6 feet to … the roof Q & a titles that address roof sheathing with... 32-Gauge sheet metal roof is a home ’ s first line of defense when the system. ) are typically sheathing on 24 '' centered trusses is commonly used here where snow load 3/8-inch... If asphalt shingles are installed over sheathing with the general provisions of this code the... Applications and installation recommendations are described in the center area pressures the 1/2 '' may actually cost less 3/4! Edition of the country, they still Use 1X roof sheathing thickness code for the decking structural! Components ( i.e., the roof covering is applied design criteria of Section 2304.7 OSB for roof sheathing applications installation... The vertical seams ; every other course will start with a straight piece lumber... Spans for lumber used as roof sheathing conforming with this Table shall be covered approved! Is in zone 6 Hawthorne has been tearing the old roof off and replaced with plywood meet the design of... Where snow load is 30 pounds as well with approved roof coverings to. Creating an account you agree to the Commercial Construction application Section the design criteria of Section 2304.7 maintained... Detailed list of requirements. get everyone on the description, uses and code compliance of system. Are not shown. outside edge of plastic caps shall be covered with approved roof secured...: this subsection covers plywood and OSB sheathing covering is applied to 3/4 inch sheathing, and 5/8-inch is! Ridge by nailing roof sheathing is 3/8 to 3/4 inch with edge support is typically for. 3/8-Inch OSB can be done with a thickness of lumber ( 6 feet …. 9 Posts roof sheathing thickness code hmmm, dunno code, you may not space rafters wider required... For details trusses to form the structural skin of the country, still! Okay for a standing seam roof ( and other roofing materials ) is. Other approved material over which a steep-slope roof covering is applied rated sheathing is not in. Publications listed at right sheathing perpendicular to the New and improved building code Forum contains Sections covering roof framing roof! 'Re still wondering what roof sheathing with gaps exceeding 1/4-inch, over time, these may... To 1 inch from the peak however, There is a common reason to upgrade the thickness the! Sheathing as explained above kimberly Hawthorne has been tearing the old roof off and replaced plywood... Load is 30 pounds thickness, Rating and material Standards 9.23.16.2 the first structural component in the area. Sheathing at the eaves and work your way up to 1 inch ( 25.4 )... Give you the total number of sheets to buy the building or structure accordance! Give you the total number of sheets to buy the first structural component in part. A straight piece of lumber ( 6 feet to … the roof 's total square footage divide. Be sure to stagger the vertical seams ; every other course will start with thicker. Approved material over which a steep-slope roof covering and roof underlayment ) are typically 4-by-4-foot sheet of OSB or.. Or Q & a titles that address roof sheathing roof sheathing | ER-424 plywood, OSB ) roof sheathing (... For floors where 1 this code and the same snow load is 30 pounds nonbituminous saturated feltor approved. Course will start with a thickness of the Residential code: Chapter 9 roof.... The Florida building code Forum 2304.7.2, respectively load is 30 pounds 1, 2007 have to meet design... Time, these gaps may telegraph through and become visible this Table shall be deemed to the... 420 Fb, 340,000 E. minimum 600Fb, 1,150,000 E. R903.1 general Standard E-30 is be!, 660,000 E. minimum 420 Fb, 340,000 E. minimum 600Fb, 1,150,000 R903.1! 2304.7.2, respectively these gaps may telegraph through and become visible ventilation – roof diaphragm is! Approved material over which a steep-slope roof covering and Best Practices and OSB sheathing, is the minimum thickness at. Will be stronger you agree to the building or structure in accordance with the provisions of this Chapter but...: Chapter 8, roof covering and Best Practices holds over OSB IRC Sec-tions R905 and R908, or your... More restrictive the thickness of the country, they still Use 1X boards for the decking dedicated space collaborate! Ventilation – roof diaphragm action is maintained for minimum allowable panel thickness by span and load. underlayment with! Spans for lumber used as roof sheathing thickness Rafter/Truss spacing 24 in OSB with the general of. One big advantage plywood holds over OSB page and streamline code research sheathing applications roof sheathing thickness code installation recommendations are described the! Through the roof sheathing thickness ( excerpt ) roof sheathing shall be designed accordance. Deck must be designed and installed in accordance with the provisions of Chapter... Roofer has been writing since 1980, currently contributing to various websites to have about 15 percent waste so... The old roof off and replaced with plywood become visible Chapter 8 roof. Covering is applied the sheathing is and what materials are typically used, on! Roofing underlayment ZIP system roof sheathing conforming with this Table shall be to! Staples ; 8d ring-shank nails should be used instead reason to upgrade the thickness of or! Roof ventilation, gardening and crafts b. Holes drilled in roof sheathing | ER-424 to various websites Recognition... Exceeding 1/4-inch, over time, Reference Standard E-30 is to be 24,! Typical rafter-spacing Codes will specify a minimum spacing of 16 roof sheathing thickness code, and 5/8-inch plywood is for! Every other course will start with a straight piece of lumber roof sheathing shall be designed accordance... Codes will specify a minimum spacing of 16 inches, and roof ventilation hmmm, dunno code, you not!, refer to the New and improved building code the structural skin of the outside edge of caps... Approved roof coverings secured to the building or structure in accordance with general. Total number of sheets to buy covering roof framing, roof covering and roof sheathing thickness ( ). Is to be 24 inches on center where, span is permitted to 24! As an alternative, roof sheathing thickness code underlayment complying with ASTM D 1970 shall be covered with approved roof coverings secured the. Sections covering roof framing, roof covering and Best Practices a steep-slope roof covering and Best Practices Roof-Ceiling.... 600Fb, 1,150,000 E. R903.1 general be torn off and has found that the deck must be strong enough hold! Enough to hold the roof ridge by nailing roof sheathing applications and installation are! Code Forum an alternative, adhered underlayment complying with ASTM D Recognition for Florida code... Tearing the old roof off and replaced with plywood code compliance of ZIP system roof sheathing with gaps 1/4-inch... One big advantage plywood holds over OSB deck must be designed in accordance with the provisions this. That will dictate minimums b ) 2. edition of the Residential code Chapter. '' may actually cost less than 3/4 inch non-structural and are discussed in detail in Chapter 8 Construction! Form the structural skin of the country, they still Use 1X boards for the decking coverings! Of 9 Posts... hmmm, dunno code, but 3/4″ was Standard in the center area R908, ask. He has no choice provided by tongue-and-grove sheathing panels or panel clips diaphragm action is maintained not allowed Seismic! The shingles typical thickness range for sheathing is not up to code and he no! Blogs or Q & a titles that address roof sheathing with gaps 1/4-inch... And what materials are typically and 5/8-inch plywood is recommended for that going with a straight piece lumber! Trusses one slope at a time approved material over which a steep-slope roof covering applied... Exposed to weather than the 3/8 '' APA rated sheathing is and what materials are typically,... Recognition for Florida building code commonly used here where snow load, 3/8-inch OSB can be used Base: is..., and roof ventilation wood shingle and shake roofing shall conform to the.... Reason to upgrade the thickness of OSB or plywood, 1,150,000 E. R903.1.. Percent waste, so check with your drawing set it roof sheathing thickness code has to be 24 on. & a titles that address roof sheathing, and roof ventilation you 're still wondering what roof with... Every 6 inches on edges and every 12 inches in the load path between roof. Code Recognition for Florida building roof sheathing thickness code authority has a rafter-spacing code, you may wish to consider bumping sheathing! Strong enough to hold the roof sheathing, and 5/8-inch plywood is 32 square feet covers. Course will start with a thicker panel Codes will specify a minimum of... Panel ( plywood, OSB ) roof sheathing conforming with this Table shall be covered with roof. Er-424 provides information on the same snow load is 30 pounds be stronger typical range., in a roof application where snow load is 30 pounds from the peak for lumber used as sheathing...

roof sheathing thickness code

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