2-hour fire walls may terminate at the underside of roof sheathing, decks, or slabs, provided the lower roof assembly is constructed of 1-hour fire-resistive construction within 4 feet of the fire wall and the supporting elements for the roof assembly are protected for the full length with an equal fire-resistive rating. IBC = International Building Code. I was not aware that there might be a condensation problem until the roof was half finished. OSB sheathing success relies on proper installation and there are a number of strategies to follow to minimize call backs and to ensure that your build enjoys longevity and aesthetic appeal. 5 A roofing system shall not be applied over an existing roof or over an existing roof deck where the roof sheathing has not been fastened in compliance with this code or where the roof sheathing will not permit effective fastening or where sheathing is water soaked or deteriorated so that effective attachment is not possible. as required by Florida Building Code (FBC) Section 2322. Where the roof sheathing is less than 0. for roof sheathing, show roof covering and sheathing FBC R301, R602, R802, R803 and R905. 1 Roof deck, that the deck must be designed and installed in accordance with ASCE 7. Holes drilled in roof sheathing for ventilation - roof diaphragm action is maintained. Residential Code (effective date January 24, 2015) as per Bloomington City Code Section 15. Improved Roof Sheathing Attachment Better attachment of the plywood or OSB roof sheathing to the roof structure through appropriate fasteners and closer fastener spacing helps prevent sections of the roof deck from being lifted off by the wind. Windstorm Roofing Requirements- 2006 IRC 1 Windstorm Roofing Requirements 2006 IRC Coastal Building Inspections and Engineering (CBI) is an engineering and inspection company located in Alvin, Texas. square footage or two roof squares (whichever is smaller), then the repair needs a permit. rafters or trusses? I am asking because I was told by a person who claims to teach a class on code enforcement that 7/16 inch OSB is not allowed as roof sheathing in Indiana. Back to Top Roofing. Reroofing Requirements in the 2015 International Codes BACKGROUND. But the Canadian stuff is the best. 1: sub floor, roof and interior wall sheathing to framing and particleboard wall sheathing to framing (a) 31. Roof Slope The code requires a roof slope (rise divided by run) of 2:12 or greater for asphalt shingles. 2-hour fire walls may terminate at the underside of roof sheathing, decks, or slabs, provided the lower roof assembly is constructed of 1-hour fire-resistive construction within 4 feet of the fire wall and the supporting elements for the roof assembly are protected for the full length with an equal fire-resistive rating. 2 Metal panel roof systems. I have seen two thoughts: leave a slight gap as if the sheathing was cut a little short and, install the sheathing to a matching edge (no gap). Sheathing: Solid sheathing is required for all roof covering materials except for wood shingle and shake. 1 mm) into the roof sheathing. Wood structural panel sheathing used for exterior walls shall conform to the requirements of Table R602. All requirements for roofing in these codes will be enforced. Designer Responsibility. R-Panel meets the International Building Code requirements for a foamed plastic roof insulation. R-Panel is manufactured with a closed-cell polyisocyanurate foam core bonded to fiberglass-reinforced facers and designed for use over metal, nailable and non-nailable roof decks with a variety of membrane systems. Florida Building Code Existing Building 2010, Section 606. International Fire Code ®, 2015 Edition (IFC®, 2015). The roof deck attachment fastening for site built single family residential structures shall be fastened in accordance with Florida Building Code (FBC) 2017 6. Does anyone know the minimum for 16 inch O. Any feedback would be appreciated. Hate to hear that cracking sound. k) Continuous load path from roof to foundation all connectors. CHAPTER 9 ROOF ASSEMBLIES SECTION R901 be designed and installed in accordance with this code and the R905. With its Exposure 1 classification, LP FlameBlock sheathing in roof deck applications is able to withstand exposure to moisture during normal construction delays. For a long time, the mobile home industry (or parts of it), got the big OK for 3/8" 3 ply CDX for roof sheathing at 2'' o. Roofing Code-Effective July 1, 2015 Building construction in Baltimore County shall comply with the 2015 editions of the International Building Code, the International Residential Code, the International Mechanical Code and the International Energy Code as well as local amendments, all as set forth in County Council Bill Number 40-15. Although it generally is understood roofing contractors are not responsible for the attachment of structural panel sheathing to underlying wood framing, proper nailing is an important consider-ation in the overall performance of steep-slope roof assemblies, particularly in high-wind regions. 001 - Final 009 - Time of Installation 010 - Tile Placing. Roof repairs to existing roofs and roof coverings shall comply with the provisions of this code. Panel edge clips (or some other type of edge suppoprt like blocking) are only required for structural ratings with thinner panels and larger support spacing … like 3/8" sheathing on roof trusses 24" o. This reduces progressive failures and wind and water from penetrating the building envelope. (Roof Repair Seattle) As a result, the next several years Cliff hand selected dedicated staff/partners which brought decades of knowledge and talents to Sharp Roofing. • The roof framing is structurally adequate to sustain the weight of an additional roof covering. The installation of built-up roofs shall comply with the provisions of this section. These requirements cover the design and construction of roof-ceiling systems, including roof framing, roof drainage, roof sheathing, ceiling finishes, roof ventilation and attic access. 5 mm) head, complying with ASTM F1667, of a length to penetrate through the roofing materials and not less than 3 /4 inch ( 19. I was not aware that there might be a condensation problem until the roof was half finished. 8 for the area covered by the roofing permit referenced above and further state that the re-nailing of the sheathing meets the requirements of the current edition of the Florida Building Code sections 2322. They withstand high winds best. CBI has been performing TDI windstorm inspections in the windstorm areas since 1991. He says it is not up to code and he has no choice. With foam sheathing (of the appropriate thickness - R-value based on condensation control as noted above) the type of cavity insulation becomes irrelevant. The roof has vents on the side on the north side of the house and has standard ridge vents. 844 and the Hurricane Mitigation Retrofit Manual. (Roof Repair Seattle) As a result, the next several years Cliff hand selected dedicated staff/partners which brought decades of knowledge and talents to Sharp Roofing. Dade County Roofing Products Approval: Dade and Broward Counties are in what is classified as High-Velocity- Hurricane-Zones (HVHZ). Reconsider using 5/8 - BCX or CDX for the roof. ZIP System roof sheathing is approved for use under asphalt-fiberglass. The installation of built-up roofs shall comply with the provisions of this section. Re: Roof Sheathing- 2nd layer of plywood? Not sure but I think this may be a code violation, like putting on a third layer of roofing. Depending on your roofing design, allow time for membranes to be installed, or at the very least get a tarp on it before it sees any rain. 5 A roofing system shall not be applied over an existing roof or over an existing roof deck where the roof sheathing has not been fastened in compliance with this code or where the roof sheathing will not permit effective fastening or where sheathing is water soaked or deteriorated so that effective attachment is not possible. All decking must be in good condition or you must replace it as nec-essary. (II) Attic spaces shall be vented with vent openings so placed as to circulate air in all parts of the attic. ZIP System ® sheathing and tape provides a water-resistant, durable underlayment for many finished roof coverings including metal, tile and asphalt, fiberglass or cedar shingles. 4 mm) below the roof sheathing and extend up the roof deck a minimum of 2 inches (51 mm). Hate to hear that cracking sound. Roof Requirements For Minneapolis MN City Of Minneapolis Minnesota Roof Requirements The information here is intended for use as a reference when performing roofing work using asphalt-based organic or fiberglass shingles on one-family and two-family residential structures with sloped roofs. The Sheather Plus, or the smart. I have read and understood the above CT State Building code requirements for the Roofing project at:. Residential Code (effective date January 24, 2015) as per Bloomington City Code Section 15. 1 Lumber sheathing. Section 706. The rim board header detail that was. What H-Clips Do. When the roof was removed the sheathing was not rotted at all but was about 50 years old. With foam sheathing (of the appropriate thickness - R-value based on condensation control as noted above) the type of cavity insulation becomes irrelevant. The Sheather Plus, or the smart. If it is not 24 inches then it would not meet the presrciptive requirements of the IRC. Underlayment shall be installed over the drip edge along eaves and under the. In the 2015 IRC, load-bearing studs were limited to 10 feet in length. Most homes in cold climates will need between 1 and 2 inches of insulating sheathing on the outside to control this condensation risk. 67 mm)] with a length to penetrate through the roof sheathing or a minimum of ¾ inch ( 19. Adjacent pieces of drip edge shall be overlapped a minimum of 2 inches (51 mm). The decking must consist of solid plywood or OSB sheathing or 1" nominal wood boards. Reroofing where the roof is part of the thermal envelope and where neither the roof sheathing nor the roof insulation is exposed. a minimum of 3/4 inch into the roof sheathing. Remove existing roofing and non-adhered underlayment to expose roof sheathing. R-Panel is manufactured with a closed-cell polyisocyanurate foam core bonded to fiberglass-reinforced facers and designed for use over metal, nailable and non-nailable roof decks with a variety of membrane systems. 7 Attachment. If you have multiple sections of roof find the area of each and add them together to find the total area. State Building Code VOLUME I-B RESIDENTIAL (1and 2 Family Dwellings) Adopted by the North Carolina Building Code Council in accordance with Act of the General Assembly of 1957, Chapter 1138 (G. The cap-nail shank shall be a minimum of 12 gauge (0. 67 mm)] with a length to penetrate through the roof sheathing or a minimum of ¾ inch ( 19. Building codes, the Engineered Wood Association, architects and most builders rate plywood and oriented strand board (OBS sheathing) equal in strength and durability. But the Canadian stuff is the best. Asphalt shingles shall have the minimum number of fasteners required by the manufacturer and 780 CMR 1504. Overlay of existing shingles is no longer allowed by the code. 2 Roof diaphragm (Roof Sheathing): Where roofing materials are removed from more than 50 percent of the roof diaphragm of a building or section of a building,…. Florida Building Code Existing Building 2010, Section 606. Other code-approved fasteners may be used. Repeat this process for each slope of the roof. Highlights of the Ontario Building Code. Build homes with hip- or steep-pitched roofs when possible. Subchapter II — Design Criteria SPS 321. Continuous insulation products can also serve as the water resistant barrier and air barrier for a structure, providing a 3-in-1 building envelope solution. International Building Code ®, 2015 Edition (IBC®, 2015) September 17, 2018. The cap nail shank shall be a minimum of 12 gage [ 0. 1(1) ALLOWABLE SPANS AND LOADS FOR WOOD STRUCTURAL PANELS FOR ROOF AND SUBFLOOR SHEATHING AND COMBINATION SUBFLOOR UNDERLAYMENTa, b, c c. Re: Roof Sheathing TABLE R503. Roof Sheathing Installation FS No. Adjacent pieces of drip edge shall be overlapped a minimum of 2 inches (51 mm). Roof sheathing comes in grid-marked 4-by-8-foot sheets, and should be installed perpendicular to the frame. for roof sheathing, show roof covering and sheathing FBC R301, R602, R802, R803 and R905. 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. Building codes provide specific guidance for reroofing projects by Mark S. Is the roof going to be a problem. mineral-surfaced rolled roofing or built-up roofing. Using inspection codes to schedule an inspection. 1: sub floor, roof and interior wall sheathing to framing and particleboard wall sheathing to framing (a) 31. We plan to replace the roofing on our 100-year-old house with architectural asphalt shingles that can stand up to the occasional hurricane we get around here. OSB sheathing success relies on proper installation and there are a number of strategies to follow to minimize call backs and to ensure that your build enjoys longevity and aesthetic appeal. Residential Roof Sheathing & Shear Walls or Braced Wall Panels July 2016 This Inspection Checklist reflects code requirements of the 2015 International Residential Code (IRC) and the 2015 International Building Code (IBC). The Sheather Plus, or the smart. j) Roofing material underlayment shall comply with section FBC R905. Florida roofing codes are some of the strictest building and roofing codes in the country. ROOFING MAINTENANCE. The skeleton of a roof is formed with rafters or trusses, generally spaced 16 inches or 24 inches apart from the center of one rafter to the center of the next. 67 mm)] with a length to penetrate through the roof sheathing or a minimum of ¾ inch ( 19. Building Code, Residential for new construction shall be provided. Hate to hear that cracking sound. State Building Code VOLUME I-B RESIDENTIAL (1and 2 Family Dwellings) Adopted by the North Carolina Building Code Council in accordance with Act of the General Assembly of 1957, Chapter 1138 (G. over 1" use 8d ring-shank or 10d common nails. Zip system roof sheathing material is a single-panel with multiple control layers built in. How should the sheathing meet at the roof peak when there will be no ridge vent? This is a simple pitched roof line with ridge beam and rafters (attached with slope hangers). sheathing/decking replaced does not exceed twenty-five percent (25%) of the entire roof surface area. But because a large number of reroofing and re-cover projects are undertaken without. OSB Design and Application Guide 5 SPAN RATINGs Span rating numbers for SHEATHING SPAN and FLOOR SPAN indicate the maximum spacing of supports over which the panels should be placed. 1 Lumber sheathing. Has the roof sheathing been fastened to code? ____ Yes/ ____No What type of fastener? Has the embedment of the diaphragm fasteners been verified? ____ Yes/ ____No. Windstorm Roofing Requirements- 2006 IRC 1 Windstorm Roofing Requirements 2006 IRC Coastal Building Inspections and Engineering (CBI) is an engineering and inspection company located in Alvin, Texas. LP FlameBlock Fire-Rated OSB Sheathing helps you meet fire codes while reducing dead load and wall thickness versus common alternatives. Building officials and builders need to check each roof to be sure these minimum code standards are followed before finished roofing is installed. ) or less is one fastener every 6 inches o. minimum of 0. OSB is now used for about 70 percent of all floor, wall and roof sheathing in North America. Where the existing roof covering is wood shake, slate, clay, cement or asbestos-cement tile. 735 Chapter SPS 321 CONSTRUCTION STANDARDS Subchapter I — Scope SPS 321. Nails used for roofing shall be corrosion-resistant roofing or shingle nails conforming to ASTM F1667-13 "Driven Fasteners: Nails, Spikes and Staples" REVISED2015-05-11; Nails shall have sufficient length to penetrate through the asphalt shingle roofing and roof sheathing or have a minimum penetration of 25 mm (1") into the roof decking. "Excessive deflection" is a personal judgement call, an opinion, my opinion. Related Articles & Links: First Look - Upcoming codes & changes coming in 2015 (Energy Code, ENERGY STAR, Water Heater) First Look: The 2015 IRC. Guertin's hard-line approach is unusual, but easily justified. Windstorm Roofing Requirements- 2006 IRC 1 Windstorm Roofing Requirements 2006 IRC Coastal Building Inspections and Engineering (CBI) is an engineering and inspection company located in Alvin, Texas. 5″ (maximum) space between each board directly over the roof rafters (or in a cold roof system, over the plywood deck). Fasteners shall comply with ASTM F 1667. a minimum of 3/4 inch into the roof sheathing. Local code will tell you min to use for nails. 4 mm) below the roof sheathing and extend up the roof deck a minimum of 2 inches (51 mm). But because a large number of reroofing and re-cover projects are undertaken without. Re: Minimum sheathing requirements for composition shingles? Just how much more do the composition shingles weight? Never really thought about that before. Roof Sheathing Specifications for both lumber and structural panel sheathing. Rich, I assume you are speeking of a roof deck using 3/8" plywood sheathing. building permits: electrical permits: pool permits: information all permits: 000: buried cables: 201: steel, bond & pipe: 501: complete rough: 100: under slab: 202. The typical thickness range for sheathing is 3/8 to 3/4 inch. Boards require a minimum of two nails per truss, while sheathing requires six nails due to face width and nail spacing. Build homes with hip- or steep-pitched roofs when possible. 1 Lumber sheathing. The City and County of Broomfield has adopted the 2015. One hr rated assembly. and the 2015. Florida roofing codes are some of the strictest building and roofing codes in the country. Click Here for modifications to the code adopted by reference. That is why there is no "general rule" or "one size fits all" type of layup for metal roof underlayment. ZIP System ® sheathing is a code recognized wood structural sheathing panel with built-in weather protection, providing unmatched strength and protection. While its allowed by code, we strongly advise against using OSB for sheathing. Example: Replacement of the existing roof cost is $10,000. With a combination of nar-rowly focused codes and more comprehen-sive codes, the International Codes provide state and local jurisdictions with a. In order to use the Interactive Voice Response System (IVRS) phone system to schedule an inspection, you must have: your permit number; the inspection code (found below) a certified recorded copy of the Notice of Commencement (NOC) returned to permitting. Many of the Florida building and roofing codes were developed to protect building owners from excessive roof damage in the event of hurricanes. Back to Top Roofing. The skeleton of a roof is formed with rafters or trusses, generally spaced 16 inches or 24 inches apart from the center of one rafter to the center of the next. The International Code Council (ICC) promulgates a family of model codes that address a wide variety of construction requirements. Built-up roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope) for drainage, except for coal-tar built-up roofs that shall have a design slope of a minimum one-eighth unit vertical in 12. Built-up roofs. CHAPTER 9 ROOF ASSEMBLIES SECTION R901 be designed and installed in accordance with this code and the R905. 2 2010 FLORIDA BUILDING CODE — BUILDING ROOF ASSEMBLIES AND ROOFTOP STRUCTURES. square footage or two roof squares (whichever is smaller), then the repair needs a permit. Sheathing: Solid sheathing is required for all roof covering materials except for wood shingle and shake. square footage or two roof squares (whichever is. 1 Roof deck, that the deck must be designed and installed in accordance with ASCE 7. Table 2304. rafters or trusses? I am asking because I was told by a person who claims to teach a class on code enforcement that 7/16 inch OSB is not allowed as roof sheathing in Indiana. Steel Roof Framing Detailed provisions for the complete design and construction of steel roofs on buildings no bigger than 60 feet long perpendicular to the joists and no wider than 36 feet. the occupancy of buildings, structures, or premises. Although it generally is understood roofing contractors are not responsible for the attachment of structural panel sheathing to underlying wood framing, proper nailing is an important consider-ation in the overall performance of steep-slope roof assemblies, particularly in high-wind regions. Each of these factors plays a role in determining how many nails you'll need to use per board during roof sheathing application. Where the roof sheathing is less than 0. roofing tricks: Hello everyone, I come across many roofs like this , with space sheathing, People that don't know about roof specs, think you need to install solid plywood over the space sheathing. the plywood under the shingles) does require a permit. Abbreviations. Chris solicited the advice and help of Cliff Hurn to establish a separate residential and commercial roofing division. Remove existing roofing and non-adhered underlayment to expose roof sheathing. With foam sheathing (of the appropriate thickness - R-value based on condensation control as noted above) the type of cavity insulation becomes irrelevant. Then, you will need to do expensive repairs, and will actually waste hundreds of dollars in the end. This is only a general list and is not intended to address all possible conditions. Section 706. Construction where the existing roof, wall, or floor cavity is not exposed. Plywood used for roof decking is typically called sheathing and carries a grade stamp indicating its load and span ratings and other performance factors. All fifty states and the District of Columbia have adopted the I-Codes® at the state or jurisdictional level. With its Exposure 1 classification, LP FlameBlock sheathing in roof deck applications is able to withstand exposure to moisture during normal construction delays. The roofer has been tearing the old roof off and has found that the sheathing is dimensional lumber. The decking must consist of solid plywood or OSB sheathing or 1" nominal wood boards. Roof-ceiling construction requirements are listed in California Residential Code Chapter 8. Building Code, Residential for new construction shall be provided. Many of the Florida building and roofing codes were developed to protect building owners from excessive roof damage in the event of hurricanes. See ESR-1473 for code compliance as a roof underlayment. 1 Sheathing requirements. Windstorm Roofing Requirements- 2006 IRC 1 Windstorm Roofing Requirements 2006 IRC Coastal Building Inspections and Engineering (CBI) is an engineering and inspection company located in Alvin, Texas. Where the existing roof has two or more applications of any type of roof covering. The previous roof was shake shingles which had 1x4 strips every 6 inches. A new high-capacity nail, the RSRS (Roof Sheathing Ring Shank) nail was added as an option for fastening roof sheathing. Does anyone know the minimum for 16 inch O. Building officials and builders need to check each roof to be sure these minimum code standards are followed before finished roofing is installed. 1) NAILS - Nails used for roofing shall be corrosion-resistant roofing or shingle nails conforming to CSA B111, "Wire Nails, Spikes and Staples". Applies to panels 24 inches or wider. Is the roof going to be a problem. "I used to do this, but not any more," says Mike Guertin, a remodeling contractor based in East Greenwich, R. All valleys, regardless of type, should be lined with a minimum 36-inch-wide peel-and-stick membrane. Everything from requirements on synthetic felt underlayment, precise spacing for fasteners, disallowing staples, taping over all joints in sheathing and retrofitting whenever possible. If you are replacing decking. An engineering analysis of the roof supporting structure is required if the total weight of all roof coverings. Nails shall have sufficient length to penetrate through or 12 mm into roof sheathing. This is also one reason why you may wish to consider bumping your sheathing up past code minimums & going with a thicker panel. For roof slopes greater than 5 units vertical in 12 units horizontal, special inspection of the roof sheathing will be required by a Clark County approved special inspector working with a listed quality assurance. 2 and its subsequent. Reroofing where the roof is not part of the thermal envelope. Phenol formaldehyde is used as an adhesive in (PF) the manufacturing process. Roof sheathing comes in grid-marked 4-by-8-foot sheets, and should be installed perpendicular to the frame. Boards require a minimum of two nails per truss, while sheathing requires six nails due to face width and nail spacing. Sheathing should be a minimum of 19/32-inch thick. Looks like I''ll be doing my part to help stimulate the economy. A structure's roof truss spacing can vary from every 12 to 24 inches. Most houses contain a weak link in the connection of the roof sheathing to the rafters or roof trusses, making them vulnerable to loss of roof sheathing in severe winds, but solutions to this. Span ratings and panel thickness highlighted in the table shall not. Roof sheathing shall be attached in compliance with the Florida Building Code, Florida Statue 553. Install Insulating sheathing above the roof deck on existing homes. BUILDING CODE FOR WINDSTORM 205 Roofing and Re-roofing 34 Minimum Length of Shearwall Required for 48 ft Roof Span 85 Sheathing Length Adjustments 86. Fasteners for asphalt shingles shall be galvanized steel, stainless steel, aluminum or copper roofing nails, minimum 12-gage [ 0. Fasteners shall comply with ASTM F 1667. Recently had hail damage to my asphalt shingles. REROOFING, OVERLAYS, & PARTIAL ROOFING Any sheathing that is replaced must be installed and fastened according to the code. 75 inch (19. They withstand high winds best. All other types of roof coverings shall be removed down to the roof deck. Building codes provide specific guidance for reroofing projects by Mark S. Roof Sheathing Specifications for both lumber and structural panel sheathing. Updated on the first day of each month. The roof underlayment is the waterproofing layer of the roof. He says it is not up to code and he has no choice. 4 mm) below the roof sheathing and extend up the roof deck a minimum of 2 inches (51 mm). Code still allows 3/8' for roof sheathing Sad but true Nope it is not customary to mix, but in this case it may be a good idea. The Ontario Building Code | Thickness or Rating 9. with fasteners as specified in Section R905. 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. Plywood and OSB are ideal materials for roof sheathing systems ranging from simple single-family residences to large commercial buildings. Replace-ment sheathing must conform to the requirements of the Building Code. International Building Code ®, 2015 Edition (IBC®, 2015) September 17, 2018. Most homes in cold climates will need between 1 and 2 inches of insulating sheathing on the outside to control this condensation risk. All requirements for roofing in these codes will be enforced. International Existing Building Code®, 2015 Edition (IEBC®, 2015) September 15, 2017. minimum of 0. At minimum I prefer a ½ sheet for 16" OC framing, while others I know will go no less than 5/8 or ¾. Building codes provide specific guidance for reroofing projects by Mark S. Final section specifies roof tie downs for uplift resistance. Then, you will need to do expensive repairs, and will actually waste hundreds of dollars in the end. or equivalent. They include plywood, oriented stand board (OSB), and composite panels made up of a combination of wood veneers and reconstructed wood layers. GENERAL INFORMATION: • This checklist is intended for use to prepare for an inspection. But because a large number of reroofing and re-cover projects are undertaken without. This is also one reason why you may wish to consider bumping your sheathing up past code minimums & going with a thicker panel. The trusses and beams of the roof give the roof its initial pitch and structure and then the sheathing is applied so the actual underlayment and roof covering can be applied. Ladder Framing at Gable Ends Use extra care when attaching a ladder-framed exten - sion to a gable end. The skeleton of a roof is formed with rafters or trusses, generally spaced 16 inches or 24 inches apart from the center of one rafter to the center of the next. How should the sheathing meet at the roof peak when there will be no ridge vent? This is a simple pitched roof line with ridge beam and rafters (attached with slope hangers). sheathing/decking replaced does not exceed twenty-five percent (25%) of the entire roof surface area. Engineered for a Variety of Roofing Materials. ¾ plywood is a favorite for some as it has been tested to stop a 2×4 being shot at it @ 120 mph. Roof Requirements For Minneapolis MN City Of Minneapolis Minnesota Roof Requirements The information here is intended for use as a reference when performing roofing work using asphalt-based organic or fiberglass shingles on one-family and two-family residential structures with sloped roofs. • The roof framing is structurally adequate to sustain the weight of an additional roof covering. Properties of FRT Plywood & inspection tips: This document summarizes the history of the development and use of fire-resistant plywood roof sheathing in the U. Recently had hail damage to my asphalt shingles. OSB has its advantages. 10 -- provides charging language for two simplified bracing approaches (isolated panel and continuously sheathed), an engineered approach, the IRC 2012 provisions and APA SR-102. Florida's Dade county is the only building code district in the country that prohibits the use of osb as a roof deck. 1: sub floor, roof and interior wall sheathing to framing and particleboard wall sheathing to framing (a) 31. , and author of Roofing With Asphalt Shingles (The Taunton Press). Has the roof sheathing been fastened to code? ____ Yes/ ____No What type of fastener? Has the embedment of the diaphragm fasteners been verified? ____ Yes/ ____No. Is the roof going to be a problem. 10 Code and Commentary for 2012 NC Residential Code - final 03/06/13 Commentary italicized and printed in red 1. In no case shall any roof sheathing be less than 32/16 span index, 19/32-in. The flow diagram below shows the major elements of plywood sheathing production. LP FlameBlock Fire-Rated OSB Sheathing helps you meet fire codes while reducing dead load and wall thickness versus common alternatives. Wood structural panel sheathing used for exterior walls shall conform to the requirements of Table R602. ROOF SHEATHING. Wall Sheathing. Guertin's hard-line approach is unusual, but easily justified. Plywood and OSB are ideal materials for roof sheathing systems ranging from simple single-family residences to large commercial buildings. Boards require a minimum of two nails per truss, while sheathing requires six nails due to face width and nail spacing. Roof repairs to existing roofs and roof coverings shall comply with the provisions of this code. The International Codes (I-Codes) are the widely accepted, comprehensive set of model codes used in the US and abroad to help ensure the engineering of safe, sustainable, affordable and resilient structures. The IBC code further states in Section 1609. The trusses and beams of the roof give the roof its initial pitch and structure and then the sheathing is applied so the actual underlayment and roof covering can be applied. "Clark County will continue to do roof sheathing inspections on the roof for slopes 5 units vertical in 12 units horizontal, or less. with fasteners as specified in Section R905. Reroofing where the roof is not part of the thermal envelope. • The National Building Code of Canada by meeting comparable requirements in CSA O325, which is also accepted by the Canada Mortgage and Housing Corporation (CMHC). All water soaked, rotten or damaged sheathing shall be removed and replaced with new. View Brochure. Here's the rub: although replacing roof coverings doesn't require a permit, replacement of roof sheathing (i. the occupancy of buildings, structures, or premises. LP ® FlameBlock ® Fire-Rated OSB Sheathing is ICC-certified to meet code and provides additional value—strength, savings and greater design flexibility. Roof Sheathing Specifications for both lumber and structural panel sheathing. Therefore roof sheathing has a different requirement than wall sheathing. Solid or spaced sheathing to which the roofing or waterproofing system is applied. Sheathing nailing size and spacing shall be in accordance with the requirements of the governing code or matching the existing roof sheathing nailing, whichever is more restrictive. Built-up roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope) for drainage, except for coal-tar built-up roofs that shall have a design slope of a minimum one-eighth unit vertical in 12. regulated by this code, or to cause any such work to be done, shall first make application to the building official and obtain the required permit. BUILDING CODE FOR WINDSTORM 205 Roofing and Re-roofing 34 Minimum Length of Shearwall Required for 48 ft Roof Span 85 Sheathing Length Adjustments 86. This zone is rated as 150 mph plus winds and is the highest rating in Florida. Roof Sheathing Specifications for both lumber and structural panel sheathing. Damage to roofs during hurricane Andrew were originally blamed on osb's poor nail-holding power. may only be used where the roof. 4 mm) below the roof sheathing and extend up the roof deck a minimum of 2 inches (51 mm). roofing over it (roof recover), you do not have to re-nail the existing roof deck or install a separate secondary water barrier. over 1" use 8d ring-shank or 10d common nails. Table R803. ROOF SHEATHING. Do I Need H-Clips? When used on a roof, ZIP System® sheathing is a combination wood structural panel and roofing underlayment. 1(1) ALLOWABLE SPANS AND LOADS FOR WOOD STRUCTURAL PANELS FOR ROOF AND SUBFLOOR SHEATHING AND COMBINATION SUBFLOOR UNDERLAYMENTa, b, c c. Improved Roof Sheathing Attachment Better attachment of the plywood or OSB roof sheathing to the roof structure through appropriate fasteners and closer fastener spacing helps prevent sections of the roof deck from being lifted off by the wind. This video is about how to pass your roof sheathing inspection, sometimes installing the roofing materials is the easiest thing in the roofing process, it took me 1 1/2 days to get fully ready to. My understanding is that one of the bases for roofing restrictions is that firemen be able to quickly and (relatively) easily chop thru to ventilate a roof in case of fire. 1) NAILS - Nails used for roofing shall be corrosion-resistant roofing or shingle nails conforming to CSA B111, "Wire Nails, Spikes and Staples". ) if memory serves me well. Asphalt shingles shall have the minimum number of fasteners required by the manufacturer and 780 CMR 1504. ROOFING MAINTENANCE. The decking must consist of solid plywood or OSB sheathing or 1" nominal wood boards.