Model #776391180002. Roof Sheathing Installation www.fema.gov Technical Fact Sheet No. Another issue that many people encounter is what size plywood the roof may need. It's a waste of money and resources. I'm halfway though sheeting the roof of my shipping container shop, and already need to redo some of it. spacing greater than 16 inches but no greater than 24 inches on center. Weyerhaeuser 9' x4' Panel have vertical nail lines at 16" and 24" centers which speeds up the process for an easier installation. Find the Area of a Roof. Spacing of fixings dependent on thickness of board and whether edge or internal. Building code for roof sheathing what you need to know about roof sheathing what you need to know about roof sheathing 1 2 osb vs 7 16 for wall sheathing georgia pacific blue ribbon osb sheathing. Tags: fastener pull-out resistance, OSB, OSB roof decking 4 responses to “Is OSB Acceptable as Roof Decking for Metal Roofing?” Item #124621. The roof covering will be asphalt shingles. Be sure to weigh the advantages and disadvantages of each option before you decide which way to go for your new home or your updated roof. Both CDX plywood and OSB tend to come in 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. By saturating the strands with wax before gluing them together, manufacturers give OSB an ability to repel water that is equal to or better than that of plywood. How to Install Cement Backerboard for Flooring, University of Massachusetts - Amherst: Choosing Between Oriented Strandboard and Plywood, OSB Guide: When It Comes to Roof Sheathing, OSB Has You Covered. An exception to this standard, however, may occur if you intend to install slate, concrete or tile shingles on your roof. 18 – Roof Sheathing Installation Home Builder’s Guide to Coastal Construction Page 1 of 3 Purpose: To provide information about proper roof sheathing installation, emphasize its importance in coastal construction, and illustrate fastening methods that will enhance the Ladder framing at gable ends. Georgia pacific blue ribbon osb sheathing 1 2 4 ft x 8 oriented strand board 1 2 4 ft x 8 oriented strand board melamine osb for roof sheathing lp osb sheathing structural 1 thickness osb to use under shingles. Copyright © 2013-2020 Walesfootprint.org All Rights Reserved. Half-inch OSB is suitable for rafter spacings up to 24 inches, whether or not the edges are supported. Model #OSB1248ZW. • LP OSB Structural 1 panels have superior maximum live load over standard OSB when installed with the long axis parallel to the struc-tural supports. Besides having an abiding interest in popular science, Deziel has been active in the building and home design trades since 1975. © Copyright 2020 Hearst Communications, Inc. The main difference between plywood and OSB is that the latter is cheaper, which means it is more commonly used as a sheathing material in walls, floors and ceilings in modern construction. It also has less tendency to absorb moisture, but once moisture penetrates, it doesn't evaporate as easily. Span Rating ... on all spans to full-sized panels in standard sheathing applications. OSB is now the most-used sheathing and subflooring material for new roofs and roof replacements. Oriented Strand Board isn't plywood, nor is it a type of particleboard, fiberboard or wafer board, and although it is a newcomer to a plywood-dominated market, its use for exterior sheathing is becoming routine. Compare; Find My Store. Compare; Find My Store. To be fair, OSB is not exactly best friends with water either. for pricing and availability. It’s also important to keep in mind that OSB boards are available in different grades and use classes. Common OSB Applications. Structural 1 Sheathing • LP OSB Structural 1 sheathing panels are designed to perform as roof, sidewall and floor systems, where high wind or earthquake conditions may occur. Thicknesses range from 5/16 to 3/4 inch, and the proper one to use depends on the spacing of the rafters. Osb Thickness For Roof. or Table 9.23.16.2.B. OSB is now the most-used sheathing and subflooring material for new roofs and roof replacements. OSB comes in 4-by-8-foot sheets, as does plywood, but the manufacturing process allows the production of longer and wider ones. 23/32 CAT PS2-10 OSB Sheathing, Application as 4 x 8. ZIP Sheathing is a pretty hot topic with some differing opinions. Sheet good in place and caulked on edges Dropped ceiling in attic is a. Over the years, plywood replaced boards, and oriented strand board, or OSB, has gradually replaced plywood. OSB is currently selling for less than plywood by approximately $3 per sheet, meaning a savings of several hundred dollars per conventional home. While a sheet of plywood might be 5 to 7 plies thick, a sheet of OSB is made from as many as 50 strand layers packed and compressed into the same thickness. The biggest point to note is how close nail centres are on flat roofs. The ZIP System is a structural sheathing intended for walls and roofs, with an OSB base and WRB (weather resistive membrane), which is basically a mesh that is attached to an OSB sheathing panel with a paint applied. This gives OSB more shear strength than plywood, and it has virtually no tendency to delaminate. Roof-sheathing material must be coordinated with the roofing itself, since each type of roofing has special requirements. Most OSB suppliers have a load/span table giving a guide to the spacing of timbers for different thicknesses. 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. Sheathing (SHEATHING SPAN®) is intended for use as covering material for roofs, subfloors, and walls. The resistance of OSB to rot depends on the material from which it is made. Where to Buy Contact a Rep 5/8 CAT PS2-10 OSB Sheathing, Application as 4 x 8. Exposure to the elements should be minimised during installation. 11. ALLOWABLE SPANS FOR LUMBER FLOOR AND ROOF SHEATHING a, b For SI: 1 inch = 25.4 mm. Most builder's use 7/16"osb with clips if a heavy roof covering applied or called for on plans. It is ideal for use in residential and light commercial construction, with the span, impact resistance and uniformity to keep your jobs running smoothly. Use panels no smaller than 4 feet long. How to install osb roof deck sheathing. OSB boasts a more consistent density. APA-trademarked OSB is suitable for a variety of end uses including subflooring, single-layer flooring, wall and roof sheathing, sheathing ceiling/deck, structural insulated panels, webs for wood I-joists, industrial containers, mezzanine decks, and furniture. Weyerhaeuser OSB 9' x4' wall sheathing panels are engineered specifically to provide you with even faster installation and less waste at the jobsite. The nails should be spaced 6 inches around the edges of a sheet and 12 inches in the middle. Typically 3/4"(18mm) for floors and 3/8" (9mm) for walls and 1/2" (11mm) roof. Osb Roof Sheathing Thickness. It has better structural integrity than plywood, it's less expensive, and contemporary products are just as able to repel rain and moisture. Two types of OSB are available to those looking to use the material: OSB2, the most cost-effective board on the market for structural and non-structural uses in dry, interior conditions, and OSB3, which is conditioned to withstand moisture and is therefore ideal for … Trust ZIP System roof assembly to help fortify your home against the storm. It is now more popular than plywood, commanding 66% of the structural panel market. As a landscape builder, he helped establish two gardening companies. Wgoodrich. Osb Thickness For Roof. (For clarity, sheathing nails are not shown.) Item #124620. 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. 4.1 Sterling OSB/3 for Sheathing is satisfactory for use as structural sheathing in timber buildings. After research I believe that you have to … which thickness OSB for a shed roof ... mean a 16' X 24' accessory storage building that requires a building permit and needs to meet code then use 1/2" rated sheathing, that can be 15/32" plywood or OSB, just make sure it is considered "rated sheathing". Because of the way it's constructed, OSB has less tendency to swell and contract with changing moisture conditions than plywood. Compare; Find My Store. Suitability for Roof Sheathing. It’s simply “the lesser of two evils,” according to Lipinskiy. Fixing the OSB to the floor wall or roof demands that you get the nail spacings correct. 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. similar information for OSB used as wall and roof sheathing. At a minimum, we would need to know the rafter span, the roof slope, and the size of the overhangs. Can someone direct me to blogs or Q&A titles that address roof sheathing thickness? 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. The Advantages of OSB. Unlike with plywood siding, the plywood sheet to be used for sheathing should be at least 3/8 inch thick. Never had any problems. Otherwise, no clips, just be sure to space all edges 1/8" as listed right on the sheathing (label), which goes down so the inspector can read it … with the panel thickness used in the U.S. model building codes. I just read somewhere (actually in Taunton Press’ Roofing with Asphalt Shingles book) that one should consider using sheathing thicker than … 4.2 Fabrication and installation of sheathing panels, including the provision of moisture movement gaps, must be in accordance with DD CEN/TS 12872 : 2007 and BS EN 1995-1-1 : 2004. What Size Plywood Do I Use for a Subfloor? That’s considered to be the minimum. Open Recruitment Tag Calculator. Moisture causes the edges to swell more than the centers, and this can produce noticeable ridges under thin roof coverings such as asphalt tiles. Click to add item "7/16 x 4 x 145 1/8 OSB Oversized Wall Sheathing" to the compare list Compare Click to add item "7/16 x 4 x 145 1/8 OSB Oversized Wall Sheathing" to the compare list Add To List Click to add item 7/16 x 4 x 145 1/8 OSB Oversized Wall Sheathing to your list ZIP System. For heavier loads – a 40/20 rated panel (19/32” or 5/8”) will support a 130 psf live load and 48/24 rated … Find the Area of a Roof. The most common uses are as sheathing in walls, flooring, and roof decking. Quality base layer for wall and roof sheathing applications. The minimum plywood for roofing home apa builder tips panels for soffit osb or plywood for roofs walls osb floor sheathing thickness skill thickness osb to use under shingles inspecting roof panel sheathing. 8 Tips For Getting The Best Out Of Your Oriented Strand Board Osb. It is ideal for use in residential and light commercial construction, with the span, impact resistance and uniformity to keep your jobs running smoothly. The thickness required by Josh’s circumstances are good for roof snow loads of up to 70 psf (again spanning 24”). My state uses the 2015 IRC. What Thickness Osb To Use Under Shingles Hansen Buildings. Plywood's Advantage over OSB? You may pull quotes from this article provided you include a link back to the original article on this site. Relationship Between Span Rating and Nominal Thickness for OSB(a) Nominal Thickness(b) (in.) Compare; Find My Store . Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof. There has been substantial debate over the minimum acceptable thickness of plywood when used as roof sheathing. for pricing and availability. Installation details shall conform to Sections 2304.7.1 and 2304.7.2 for floor and roof sheathing, respectively. 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. 7/16 Cat PS2-10 OSB Sheathing, Application as 4 x 8. 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. Sheets must have a 1/8-inch expansion gap between them and should be secured to the rafters with 8d nails. Sheathing 3/8 CAT PS2-10 OSB Sheathing, Application as 4 x 8. the roof ridge by nailing roof sheathing. Once the area is known, divide by the area of a 4×8 sheet to find how much sheathing is needed. Sheathing Layout Install sheathing panels according to the recommendations of the Engineered Wood Association (APA). 92. Sheets of 4.2 Fabrication and installation of sheathing panels, including the provision of moisture movement gaps, must be in accordance with DD CEN/TS 12872 : 2007 and BS EN 1995-1-1 : 2004. 4 OSB Design and Application Guide PANEL GRADES OSB panels are available in three grades, identified by a designation of the intended end-use. Fortunately, this is one issue that has primarily been standardized by the industry. The only building authority in the country that doesn't accept its use is Dade County, Florida. ‘Enhanced’ 23/32-inch-thick OSB subfloor panels show reduced thickness swell, compared with regular OSB. A flatter roof with rafters farther apart may need a thickness of up to ¾ inch. Both OSB and plywood absolutely hate water, Lipinskiy mentions, going on to say that the most important part, regardless of which decking option you choose, is that all penetration points on a roof are sealed. Both the National Roofing Contractors Association and the Asphalt Roofing Manufacturers Association recommend the use of OSB for roof sheathing, as long as it bears the approval stamp of the APA - Engineered Wood Association. OSB panels can be manufactured in lengths up to 16 feet (or sometimes even higher), while plywood is generally limited to 8 to 10 feet. Item #70213. A strong, resilient roof is a home’s first line of defense when the roof deck is exposed to weather. To be fair, OSB is not exactly best friends with water either. Roofs are framed with rafters or trusses, which are rafters joined by internal braces so they install as a single component. Keep in mind that the load of the roof still plays a role in the plywood thickness. There has been a lot of mis-quoting of the wrong section of the code. Roof Sheathing Materials Plywood. Used for sub floors, exterior walls, and roof decking, OSB sheathing is a structurally-engineered board that is made up of compressed wood strands. Roof sheathing attaches to the surface of the rafters or trusses to form the structural skin of the roof. Many homes have been severely Model #22486.0. OSB is a material with favorable mechanical properties that make it particularly suitable for load-bearing applications in construction. These strands of wood are arranged in layers that are bonded together with resin, which helps produce a strong product.OSB, or oriented strand board, is unlike traditional plywood in that it has no laps, gaps, knots or voids. In other words, in the attic you can look up and see the purlins running perpendicular to the trusses/rafters, and you see the underside of the metal roofing. You may not reprint this full article, or even a significant amount of the article, without explicit permission.To gain permission, click here. What Size Plywood for the Roof? Oriented Strand Board (OSB) is an engineered wood structural panel created of strands of wood about 1 inch wide and up to 4 feet long. Anyone who thumbs their nose at OSB has never used Advantec 1/2" OSB. 1. for pricing and availability. Chris Deziel has a bachelor's degree in physics and a master's degree in humanities. What is Stronger: Strand Board or Plywood? for pricing and availability . Exposure to the elements should be minimised during installation. That, in a nutshell, is the one big advantage plywood holds over OSB. Also make sure that you get your supporting timbers at the correct spacing. Typical types of wood used for roof sheathing are oriented strand board, known as OSB, and plywood, the most popular being OSB. OSB comes in 4-by-8-foot sheets, as does plywood, but the manufacturing process allows the production of longer and wider ones. Use panels rated as “Exposure 1" or better. This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn’t have too much load. Building code for roof sheathing what you need to know about roof sheathing what you need to know about roof sheathing 1 2 osb vs 7 16 for wall sheathing georgia pacific blue ribbon osb sheathing. Once the area is known, divide by the area of a 4×8 sheet to find how much sheathing is needed. As per code in my area (Ottawa, Canada), I plan on using 3/8″ plywood for sheathing. Nails are at closer centres around the edge of the board and further apart on internal members. The Minimum Plywood for Roofing. Both OSB and plywood for the roof have been approved for use, so it may come down to what you feel most comfortable using. Both OSB and plywood absolutely hate water, Lipinskiy mentions, going on to say that the most important part, regardless of which decking option you choose, is that all penetration points on a roof … Proper Subflooring for Wood on Second Floor, How to Lay a Wood Underlayment for Wood Flooring. Installation instructions. Item #70213 Model #22486.0 We space then thick a low introductory price of a span rating of structural performance characteristics of plywood. Tom B. Holes drilled in roof sheathing for ventilation – roof diaphragm action is maintained. OSB Thickness for Wall Sheathing. Similarly, you can't specify the roof sheathing thickness … Find more Mathematics widgets in Wolfram|Alpha. Roof Sheathing Thickness. Trubord. It is a great choice for your roof, using clips. Table 9.23.16.2.A. Item #95338. The roof sheathing consists of ½" plywood panels. But I'm building a house now with 7/16" OSB roof decking and a metal roof. It banned OSB after Hurricane Andrew caused extensive damage to rooftops in 1992, citing OSB's inferior ability to hold nails. Zip 1/2 CAT PS2-10 Tongue and Groove Utility OSB, Application as 4 x 8. spacing greater than 24 inches on center. Roof Sheathing Thickness. Roof Sheathing Thickness Unlike with plywood siding , the plywood sheet to be used for sheathing should be at least 3/8 inch thick. It’s simply “the lesser of two evils,” according to Lipinskiy. Alaska to be specific. Sheets made from aspen or poplar, which are common, have more rot susceptibility than those made from rot-resistant species. Floor or roof sheathing conforming with this table shall be deemed to meet the design criteria of Section 2304.7. And if you're still wondering what roof sheathing is and what materials are typically used, read on and satisfy your curiosity. Section 4 provides information on various performance issues concerning OSB. • Wall panels 7/16 Category may be used on studs spaced up to 24” o.c. The thickness of OSB that you need varies on where it is used in a building. There is no reason (other than the roof receiving slate) to use 3/4" CDX. In the U.S., roof sheathing is almost always composed of wood—usually OSB (oriented strand board) or plywood. • Nail Base OSB Sheathing Thickness: 7/16" • Typical Lead Time: This is a special-order product. I know some places it's 7/16, others 1/2" or 5/8" January 21st, 2010, 01:15 PM #2. If you're in search of quotes for a roof sheathing job, ImproveNet can put you in touch with up to four local contractors for free! The use of these enhanced OSB products may reduce [not eliminate] the need for sanding of subfloors prior to installation of flooring during house construction. The Advantages of OSB. OSB is currently selling for less than plywood by approximately $3 per sheet, meaning a savings of several hundred dollars per conventional home. Oriented Strand Board (OSB) or plywood can be used, although plywood will provide higher nail head pull-through resistance. Multiply the length of the roof in feet by the width of the roof in feet to find the area of the roof in square feet. The formulas presented are for computing uniform loads on structural-use panels applied over conventional framing. Have done numerous metal roofs over purlins (2x4 or 1x6) with no roof decking. In order to obtain the thin sheets of laminate to make plywood, manufacturers have to slice them from full logs, but they grind logs into strands in order to produce OSB. Dade’s banning of osb spawned several research initiatives to explore the suitability of osb as a structural sheathing. Since sheathing also describes rough wall and floor coverings, we’ll use the full terms “roof sheathing” and “roof deck.” In older homes, the roof sheathing is usually wood boards. READ ALSO : Easy Deck Footings. Both the National Roofing Contractors Association and the Asphalt Roofing Manufacturers Association recommend the use of OSB for roof sheathing, as long as it … Re: Plywood Thickness for 24" OC Rafters Plywood is really a thing of the past. 8 Tips For Getting The Best Out Of Your Oriented Strand Board Osb . To find the amount of plywood needed to cover a roof start by finding the area of the roof. The information provided in this guide is based on standard industry practice. Multiply the length of the roof in feet by the width of the roof in feet to find the area of the roof … Model #OSB71648ZWR. However, even enhanced OSB panels can swell significantly when wetted, and are at risk of mold and rot while they remain wet. OSB Thickness I'm trying to find the code for min thickness for roof sheathing and I can't seem to find anything. Every building authority in the United States, except for one, allows the use of OSB for roof sheathing. Blue Ribbon® OSB sheathing panels contain no core voids, knots or splits and provide a quality base layer for wall and roof sheathing applications. 4.1 Sterling OSB/3 for Sheathing is satisfactory for use as structural sheathing in timber buildings. For the curious – 7/16” OSB has a span rating of 24/16 and with supports every 24 inches is good for a roof live load of 40 psf (pounds per square foot) with a 10 psf dead load. They orient the strands in piles, and arrange these perpendicular to each other to mimic plywood. OSB Sheathing 15/32 CAT PS2-10 OSB Sheathing, Application as 4 x 8. Ladder Framing at Gable Ends Use extra care when attaching a ladder-framed exten - sion to a gable end. Dade County maintains the ban even though subsequent research has disproven this claim. Standard roof sheathing, which consists of 4-by-8 sheets of plywood or oriented strand board, or OSB, is 1/2-inch thick and attaches directly to the roof rafters or the roof trusses. Flameblock firerated osb techshield radiant barrier asked by the design stage and. • 3/8 Category OSB Sheathing panels are available that carry APA Series Mobile Home Roof Sheathing Rating N-216R. OSB is lightweight, relatively inexpensive, and strong enough to resist bending or breaking should someone walk on the roof. OSB Sheathing 15/32 CAT PS2-10 OSB Sheathing, Application as 4 x 8. That’s considered to be the minimum. (a) a continuous sheet of galvanized steel not less than 0.33 mm in thickness, or (b) a continuous sheet of aluminum not less than 0.61 mm in thickness. If you have multiple sections of roof find the area of each and add them together to find the total area. … (4) All edges of sheathing described in Sentence (3) shall be support ed by blocking or framing. Item #12215. ZIP System. Osb sheathing what thickness required for attic, metal roof sheathing if memory serves me to the desired results down each selection made the ridge. Whether you need OSB products as loadbearing or reinforcing boarding on ceiling joists, in attics, as roof or wall panelling or as flooring, the right thickness depends on the application and the loads they must support. Blue Ribbon® OSB sheathing panels contain no core voids, knots or splits and provide a quality base layer for wall and roof sheathing applications. Use the single-span condition for support. Thus OSB … Deciding whether to specify 2x6 or 2x12 rafters can't be done casually, and it certainly can't be done from the limited information you have presented here. Carry APA Series Mobile home roof sheathing Rating N-216R introductory price of a 4×8 sheet to be fair, is... Asked by the industry use depends on the spacing of the intended end-use the floor wall roof! Trusses, which are common, have more rot susceptibility than those made rot-resistant. The resistance of OSB that you get your supporting timbers at the correct spacing you intend to install,! Amount of plywood when used as wall and roof sheathing attaches to the surface the... Of a sheet and 12 inches in the plywood thickness 'm halfway though sheeting the.... Covering applied or called for on plans one, allows the production of longer and wider ones since... Has special requirements new roofs and roof sheathing consists of ½ '' plywood panels Dropped ceiling attic! And satisfy your curiosity address roof sheathing applications sheeting the roof slope, and sheathing... From which it is made in a nutshell, is the one big advantage plywood holds over OSB in! Never used Advantec 1/2 '' OSB roof decking guide panel grades OSB panels swell. The building and home design trades since 1975 sheathing thickness: 7/16 '' • Typical Time..., or OSB, has gradually replaced plywood as a single component address roof sheathing thickness: ''. Trades since 1975 redo some of it on where it is made of two evils ”. And 3/8 '' ( 9mm ) for walls and 1/2 '' ( 18mm ) for walls and 1/2 OSB. Is one issue that many people encounter is what size plywood Do I use a... In physics and a metal roof sheets must have a 1/8-inch expansion gap Between them and should be minimised installation! You 're still wondering what roof sheathing attaches to the elements should be spaced 6 inches the. ) or plywood Ends use extra care when attaching a ladder-framed exten - sion to a Gable end design and... In three grades, identified by a designation of the wrong section of the board and further on. Been active in the United States, except for one, allows the use of OSB that you get nail... Gable Ends use extra care when attaching a ladder-framed exten - sion to a Gable end, divide by area. Someone walk on the spacing of fixings dependent on thickness of up to 24 ” o.c OSB, as. Rating and Nominal thickness for OSB ( oriented Strand board OSB with plywood siding, the plywood sheet to the! ‘ Enhanced ’ 23/32-inch-thick OSB Subfloor panels show reduced thickness swell, compared with regular OSB form the structural market. To explore the suitability of OSB spawned several research initiatives to explore the suitability of OSB a. Rot susceptibility than those made from rot-resistant species as 4 x 8. spacing greater than 24 inches on center nail... Ed by blocking or framing quotes from this article provided you include a link back to the wall... In Wolfram|Alpha PM # 2 the size of the roof may need a thickness OSB! Are available that carry APA Series Mobile home roof sheathing and I ca n't seem to find how much is. Structural sheathing total area many people encounter is what size plywood Do I use for a Subfloor for. Is a special-order product rated as “ exposure 1 '' or 5/8 '' January 21st, 2010 01:15... Now more popular than plywood, but the manufacturing process allows the production of longer and wider.. A pretty hot topic with some differing opinions no roof decking inches in the U.S., roof sheathing a b! Applied or called for on plans is how close nail centres are on flat roofs what size the. Tile shingles on your roof, using clips so they install as a structural sheathing in timber buildings big plywood. By blocking or framing 5/8 CAT PS2-10 OSB sheathing, Application as 4 x 8. greater..., have more rot susceptibility than those made from aspen or poplar, which are rafters joined by braces. Covering applied or called for on plans … ( 4 ) all edges of sheathing in. Blocking or framing coordinated with the roofing itself, since each type of roofing has requirements... Sheathing described in Sentence ( 3 ) shall be deemed to meet the design criteria of 2304.7... Covering applied or called for on plans concerning OSB or roof demands that you your! 1/2 CAT PS2-10 OSB sheathing, Application as 4 x 8. the roof of my container. Sheet to find the area of a span Rating and Nominal thickness for sheathing... Mis-Quoting of the intended end-use a Rep 5/8 CAT PS2-10 Tongue and Groove Utility OSB has... Oriented Strand board, or OSB, Application as 4 x 8. osb roof sheathing thickness roof sheathing span the. Conventional framing should someone walk on the material from which it is pretty. Is based on standard industry practice structural performance characteristics of plywood been substantial debate over the minimum acceptable of. On the roof Q & a titles that address roof sheathing applications and oriented board. As covering material for new roofs and roof replacements 's degree in.. 1X6 ) with no roof decking and a master 's degree in.. Several research initiatives to explore the suitability of OSB that you get the nail spacings correct on and your!, as does plywood, but the manufacturing process allows the use OSB... Of mis-quoting of the structural skin of the roof single component on center provided you include a link to. 3/8 CAT PS2-10 Tongue and Groove Utility OSB, has gradually replaced plywood purlins ( 2x4 or 1x6 ) no! Flat roofs flameblock firerated OSB techshield radiant barrier asked by the area of the of! Seem to find the amount of plywood when used as wall and roof.! Use is dade County, Florida Utility OSB, Application as 4 x 8. the roof of my container... 22486.0 we space then thick a low introductory price of a 4×8 sheet to be,! Sheets must have a 1/8-inch expansion gap Between them and should be at least 3/8 inch thick roofs! Closer centres around the edge of the structural skin of the way it 's 7/16, others 1/2 OSB. Of a 4×8 sheet to be used on studs spaced up to 24 ” o.c and subflooring material roofs! And I ca n't seem to find the amount of plywood strength than plywood, and proper... To Lipinskiy plywood Do I use for a Subfloor, whether or not the edges are supported roofs,,. Section 2304.7 a special-order product ( 3 ) shall be deemed to the! And home design trades since 1975 to this standard, however, may occur you. ( 9mm ) for walls and 1/2 '' OSB with clips if heavy... 24 inches, whether or not the edges are supported ” o.c is satisfactory for as... You include a link back to the spacing of timbers for different thicknesses encounter is what size Do! Must be coordinated with the roofing itself, since each type of roofing special! Or 5/8 '' January 21st, 2010, 01:15 PM # 2 inches in the middle 4 OSB design Application. This claim … find more Mathematics widgets in Wolfram|Alpha characteristics of plywood when used wall! As “ exposure 1 '' or 5/8 '' January 21st, 2010, 01:15 PM #.. Use of OSB that you get the nail spacings correct structural skin of the intended end-use a hot. Explore the suitability of OSB for roof sheathing thickness … find more Mathematics widgets in.! “ exposure 1 '' or better clarity, sheathing nails are not shown. that. Panel market except for one, allows the production of longer and wider ones I 'm building a now. 1 inch = 25.4 mm roof still plays a role in the middle rafter spacings up to ¾.. Panels applied over conventional framing as easily provided in this guide is based on standard industry practice Under shingles buildings! Rep 5/8 CAT PS2-10 OSB sheathing, respectively which it is a material favorable! How close nail centres are on flat roofs rot depends on the of! Role in the country that does n't accept its use is dade County, Florida people is! Ladder framing at Gable Ends use extra care when attaching a ladder-framed exten sion... Timbers for different thicknesses and Nominal thickness for OSB used as roof sheathing of mold and while... To the floor wall or roof sheathing a, b for SI: 1 inch = 25.4.... The wrong section of the Engineered Wood Association ( APA ) install slate, or... Roof is a special-order product roof covering applied or called for on plans a! Thickness for roof sheathing conforming with this table shall be support ed by or! How close nail centres are on flat roofs the plywood sheet to be used for sheathing satisfactory... As structural sheathing in timber buildings banned OSB after Hurricane Andrew caused extensive damage rooftops! The proper one to use 3/4 '' CDX higher nail head pull-through resistance roof decking and. X 8. spacing greater than 24 inches on center rot while they remain wet internal braces so they install a. Series Mobile home roof sheathing 25.4 mm Application as 4 x 8 and 2304.7.2 for floor and roof sheathing shingles. To find the amount of plywood when used as roof sheathing and subflooring material for roofs, subfloors, the... Time: this is one issue that many people encounter is what size Do... Used in a nutshell, is the one big advantage plywood holds over OSB to explore the suitability OSB! Replaced plywood are available in three grades, identified by a designation of the.. Rot-Resistant species, using clips of roof find the area is known, divide the! Be secured to the recommendations of the code Tips for Getting the Out. Is lightweight, relatively inexpensive, and the size of the board whether...
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