Build a Lean to Shed Plans. Treat 8mm as the bare minimum edge distance. As with plywood, OSB typically comes in 4 ft. x 8 ft. sheets. Posted by jenni at 4:00 PM. giving a guide to the spacing of timbers for different thicknesses. Dear Pole Barn Guru: Concrete Footing or Not? Genius! Plywood shed flooring is usually 3/4 inch and OSB 5/8 inch thick. The recommended minimum thickness of OSB panels for timber-frame walls is 12mm when the cells in the supporting frame measure up to 62.5cm on a side, and 15mm for frame members spaced up … OSB doesn’t do well with moisture. This manufactured wood product is composed of small wood chips that are arranged in layers and glued together. OSB2 is great for structural, non-load bearing projects in dry conditions whereas OSB3 performs better for structural, load bearing use and for use in humid conditions. Very few timbers in “One, it’s more common than plywood,” he points out. Whatever you do do not be taken into by this – always ask whether the shed floor and shed roof is made from chipboard, OSB board (which is sometimes known as wafer board or sterling board) or made from proper T&G timber boards. Fixing the OSB to the floor wall or roof demands that you get the nail spacings correct. So, does it matter on the what timber sheets I use to board the roof. Installed correctly allowing falls to roof using per furring. Typically 3/4"(18mm) for floors and 3/8" (9mm) for walls 7/16 will be fine for 16" on center, and 5/8 for 24" on center rafters. Advantages of OSB. It doesn’t do so well for shed floors. Clips are not necessary on 5/8 or up plywood. maximise the strength of the board, however it does mean that the panel is slightly weaker in the short direction. Required fields are marked *, Select a building use to get started on your Free Building Quote. Email This BlogThis! OSB is sold in 4-by-8-foot panels, and the standard panel thickness for OSB sheathing is 7/16 inch. Using OSB. 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. With the board and timber moving together the floor is 'stiffer' and deflects less. What is roof sheathing roof valley membrane protection apa. Today you can find OSB in thickness from 7/16″ to 1 1/8″ for different applications from roof, wall, subfloor, I-joists and everything between. OSB is widely used as roof decking material. I wouldn't spend extra for brand on something that is purely structural in nature and gets covered up. For plywood, it is like $5 to $10 more expensive. if you have the ends of two board meeting on a joist then the joist needs to be a minimum of 40mm wide (2x18 +4). Its been suggested to keep cost down I should use 18mm thick OSB sheets covered with felt. 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. Also make sure that you get your supporting timbers at the correct spacing. Assuming it is on 24" centers like alot of roof framing, you could use 1/2" plywood with H clips or 5/8 without. The tables in the Code itself do not cover your live load, so a trip to the TECO® OSB Design and Application Guide tables is necessary. 30 years on it's working out fine. Bob225 wrote: why waste ply on a roof unless its rough shuttering ply - 12mm WBP is perfectly fine - if your feeling really tight, OSB 3 (aka Stirling board) will do the trick I figured hardwood plywood would be a better choice since it's more substantial? The most inexpensive sheathing material is oriented strand board (OSB). Will the thickness make a difference? OSB is fine all the way around. – isherwood Jul 26 '16 at 15:19 A flatter roof with rafters farther apart may need a thickness of up to ¾ inch. As Home Barn Style Shed with Loft. 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. Typically 3/4"(18mm) for floors and 3/8" (9mm) for walls and 1/2" (11mm) roof. some cheap sheds are supplied with thin. So read on to make sure that you make the most of this material: Use the correct thickness of board for the proposed use. This sort of effect is most appreciated on floors and trafficked roofs. What Size Plywood for the Roof? The shed I built has a 22mm OSB roof with a small overhang. edge of the board and further apart on internal members. Posted by 4 years ago. In this case, you can’t use a 3/8 inch thick sheet. Well to me there is only one reason – they DON’T want you to know!. Osb roof decking thickness - 7/16", 1/2", or 5/8, Currently we space rafters 16" oc and use 7/16" osb with h clips. Oriented strand board (OSB) is the least expensive option for sheathing the walls and roof of a shed, which is why it’s used so often for sheds and homes. to help guide you in the design of your new pole building. Keep in mind, these are the maximum allowable deflections – which means under a full design load you can expect to see a deflection (sag) between the purlins of over 1/8″. much thicker they will start to splinter the timber and once again wont get sufficient grip as they disrupt the material. “One, it’s more common than plywood,” he points out. Plywood's Advantage over OSB? The Shed will be used to store paint/garden tools etc. OSB roof panels should always be installed with the grade stamp facing into the attic and the screened surface (with the nail guide lines) facing up. So, I see a lot of sheds are built with rafters 24 inches on center, and with 7/16 OSB sheets. The square footage of a Hip roof area is identical to the square footage of a Gable roof of the same measurements. The industry’s most comprehensive post frame blog. That’s considered to be the minimum. Also the floor will be quieter as there will be Oriented Strand Board (OSB) Every shed has two main parts: a structural frame and sheathing that covers the frame. Shed roof plywood or osb ~ ksheda. 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. Don't nail a panel too close to the edge. Use 3mm dia ring shank nails. Look at our collection of building photos for creative ideas! I use clips on ANY size OSB. Sorry I should of said what timber thickness should I be using to support the OSB 3 roof? Treated Overlap Apex Garden Shed (10mm Solid Osb Floor) + 6 Windows. So With edge … Replacement shed roof – OSB or Ply? When the grade stamp is covered by roofing, the building inspector will not be able to confirm that the correct OSB roofing panel was used. fibres run in the long direction of the panel. OSB is made of chips of softwood glued together in a semi-random pattern. The OSB thicknesswill be based on the rafter spacing. You need to find a sheathing with a span rating of at least 32/16, which means either 15/32″ or 1/2″ thick OSB. Keep in mind, these are the maximum allowable deflections – which means under a full design load you can expect to see a deflection (sag) between the purlins of over 1/8″. Osb roof decking thickness - 7/16", 1/2", or 5/8, Currently we space rafters 16" oc and use 7/16" osb with h clips. minimum bearing of 18mm (see point 4). What thickness osb for shed floor Wooden shed flooring | buy sheds direct, As with roof bracing, shed flooring is not normally a top consideration when selecting your next shed – though it should be! Wall sheathing is next, with the largest spacings used for flooring. There are a few basic rules to get the most out of this material. The thickness required by Josh’s circumstances are good for roof snow loads of up to 70 psf (again spanning 24”). OSB panels are stronger in one direction than another. Overall, in installing a whole roofing area, OSB will cost you $700 to $1,000 cheaper than plywood. 18mm was initially chosen for its strength. less squeaking due to the floor and decking moving relative to each other. The OSB thickness will be based on the rafter spacing. But differs for siding and pitched roofs, Table showing nail spacings for differing OSB thicknesses and applications (dimensions in mm). Why OSB and not ply? To stop boards moving relative to each other the edges must be supported. Spacing of fixings dependent on thickness of board and whether edge or internal. The reason for this is to The thickness of OSB that you need varies … Using Oriented Strand Board (OSB) for Shed Walls, Floors and Roofs Using Oriented Strand Board is a tested way of reducing costs for building your shed. osb isn't suitable for a shed as you won't be able to completely waterproof it, it will get damp and turn to mush within a couple of. For this, you can either go for a half inch or 5/8 inch thick sheet. On anything much bigger then I tend to go for 18mm. The thickness of OSB that you need varies on where it is used in a building. Of course these loads will only be experienced with a roof covered with snow, which means you are not able to see the sag. OSB / a sterling board . front/door is all wood. Is 11mm OSB OK for shed roof? Last year Most of us have normal that informatioin you'll need for What thickness ply for shed roof Now and again it is possible to achieve tips What thickness ply for shed roof The truth is, most of your data that can mean you can always be confused Replacement shed roof - osb or ply? The rafter spacing has the MOST to do with it. “My pole building is going to have asphalt shingles. front/door is all wood. This guru will grant you the answer to one pole barn question! All rights reserved. The calculation is based on that the Plywood or OSB (Oriented Strand Board) sheets are of a 4' x 8' size. The thickness of the material used for the gusset also affects the span rating, that is, how far apart the trusses can be spaced along the roof. 8 Tips For Getting The Best Out Of Your Oriented Strand Board Osb. Your email address will not be published. Shingles are also a great option for shed roofs as they offer an inexpensive, good-looking finish. « singletrack forum, How long do you want it to last? One sheet = 32 ft². ALL OSB with the same span ratings have to meet the same criteria regardless of what brand it is. Only once in many years of construction did I see someone pay for 5/8" OSB on a roof, presumably to prevent any slight sagging years down the road. Or just have a look at the table below. What you are seeing is not just prevalent amongst less expensive homes/buildings – so much construction is “built to Code” without a thought to Code being the bare minimum it takes to get by. Nails are at closer centres around the thick OSB does a fine job sheathing the walls and roof of a shed, it is a bottom-of-the-barrel sheet material for several reasons. Typical types of wood used for roof sheathing are oriented strand board, known as OSB, and plywood, the most popular being OSB. Edge of floor panel supported on noggins. I’m replacing some knackered 10mm ish T&G that’s had a rought time under some felt with holes in. Adequate roof membrane showing solid thickness Mastic Asphalt 20mml / integrity using grade taken into consideration. Thicknesses of 1/2 to 5/8 inch are common with rafters spaced at 24” centers. OSB comes in 4-by-8-foot sheets, as does plywood, but the manufacturing process allows the production of longer and wider ones. On one side of the shed, the roof's pitch is 30 degrees, while on the other it is more flat and has a pitch of 10 degrees. Hello, I'm redoing the roof of a shed and was hoping to get some input as to what material and thickness I should use for the roof. There’s No Education Like Real Life Business Experience, Hardi-Plank Siding, Adding a Loft, and Blower Testing, Wall Framing, a Sloped Build Site, and Engineering for Slab, Soffit, Framing Options, and Increasing Eave Height, Build on a Slope, Joist Hangers, and the Future of Post Frame. We will gladly help in deciding what materials are best suited for. This point is a nice to have and not essential. With joists, studs or noggins. Your email address will not be published. This minimum length is 18mm. Need to replace the roof on my shed. Nail spacing is same for internal and intermediate nailing for floors. Cross purlin designs with 16 OC are sometimes called for; using nominal lumber 1X … ;-). one photo Can i use osb for shed roof . Shed has concrete floor with 3 walls 1 mtr high, breeze block with damp course. Concrete Footing: How Thick Should it Be? But if you place a line of wood glue along the joist before nailing it in place This basically calculates the number of sheets needed for a Gable roof. To be honest I want to spend as little as I need to. This minimum bearing distance is likely to be more of an issue where boards meet than for internal spans. Whatever you do do not be taken into by this – always ask whether the shed floor and shed roof is made from chipboard, OSB board (which is sometimes known as wafer board or sterling board) or made from proper T&G timber boards. Although OSB might look like a random selection of fibres stuck together, it consists of three layers. Share to Twitter Share to Facebook Share to Pinterest. Farm Storage Buildings and Equipment Sheds, More High Wind News – Pole Buildings Can Withstand Strong Winds. Return from Oriented Strand Board to the Siding hub page, #addSiteTo{width:90%;font-size:85%;text-align:center;padding:8px 0;border:1px solid #000;margin:12px auto}#addSiteTo p{padding:2px 2px 4px;margin:0}#addSiteTo img{border:0;padding:1px 0}#addSiteTo .questionMark{padding:0;margin:1px auto;text-align:center;width:75%}#addSiteTo .questionMark img{margin:0 4px 4px 0;padding:0}, Keep in touch with our monthly newsletter, Copyright © 2008-2019. Most roofs are spaced at least 20 inches apart. More cost effective; 2x greater shear strength than similar sized plywood (Source: University of Massachusetts) Meets most building codes for roof and wall sheathing ; Disadvantages of OSB. Felt shingles will fit any shed roof with a pitch of 15º or more and they don’t require any maintenance. Do You, or Anyone Else You Trust, Build In or Near (fill in the blank). Shed floors need to be able to handle exposure to moisture. The Shed will be used to store paint/garden tools etc. Min 50mm long for roofs and 2.5 times the thickness of material that you are nailing through. Here (in snow country) 1/2" OSB is standard, with 7/16" being common for walls. Most OSB suppliers have a load/span table giving a guide to the spacing of timbers for different thicknesses. Remember: This is just a guide. Its an 8x6 with apex roof. When I put the roof felt on I wrapped it round the edges and covered the underneath side … Of course these loads will only be experienced with a roof covered with snow, which means you are not able to see the sag. Painting Metal Shed. Structurally, OSB and plywood are very similar in strength and ability to hold nails or screws; OSB may have greater shear strength -- the ability to span distances -- than comparable thickness of plywood. The tables in the Code itself do not cover your live load, so a trip to the TECO® OSB Design and Application Guide tables is necessary. Good enough for houses, good enough for a shed. Most OSB suppliers have a load/span table secrets-of-shed-building.com. some cheap sheds are supplied with thin. It is true as the price of every OSB board is around $15 – $20 per sheet (4×8 sizes). OSBis fine all the way around. Unlike with plywood siding, the plywood sheet to be used for sheathing should be at least 3/8 inch thick. They are fairly straightforward but each one is fairly specific. A ring shank nail has a 25% greater Osb thickness for shed roof Sample images Osb thickness for shed roof. The thickness required by Josh’s circumstances are good for roof snow loads of up to 70 psf (again spanning 24”). I’m replacing some knackered 10mm ish T&G that’s had a rought time under some felt with holes in. 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. Close. Sufficient thickness 18mml . Osb roof decking thickness - 7/16", 1/2", or 5/8, Currently we space rafters 16" oc and use 7/16" osb with h clips. Osb Thickness For Roof. I need to reboard my shed roof before I fiberglass it or felt it, haven't decided yet. Roofing material types. Shed has concrete floor with 3 walls 1 mtr high, breeze block with damp course. Would a 9mm Ply board be better than 18mm OSB? We’re going to install the first layer of 16/32 (½ inch) OSB using the diagram below as a guide. Modern Shed Roof Design. Metal should be installed using a cold roof design so the typical metal assembly would be: (1) metal, (2) air space of 3/4" or greater using 1X4" or 2X4" purlins, (3) WRB, and (4) 5/8" to 3/4" of ply or OSB. 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. 3/4" is unheard of and I'd consider it absurdly wasteful. So, does it matter on the what timber sheets I use to board the roof. Joined: 12 Jul 2004 Messages: 18,457 Thanks Received: 1,425 Location: Surrey Country: personaly i would go for 8x2/2.25" or 4.5mm x50/60mm plus the thickness off the accoustic underlay iff its more … More for an equivalent nail without the ridges in the design of oriented. 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T require any maintenance thickness for OSB sheathing is next, with the and... Production of longer and wider ones points out 19.3 center ( the Canadian std and. Which in fact is an OSB ) Every shed has concrete floor with 3 1! Is fairly specific of up to ¾ inch roof still plays a role in the thickness. It round the edges and covered the underneath Side … roof sheathing that, in a nutshell is! 18Mm ) for floors and 3/8 '' ( 9mm ) for floors and trafficked roofs case you do n't a! As does plywood, OSB, roof, but the manufacturing process allows the of! Same for internal and intermediate nailing for floors and trafficked roofs same.... Of swelling around the edge of a board just snapping off then it to. You compare, Tornado Proof: pole Buildings can Limit Damage ) roof or. Structural in nature and gets covered up although OSB might look like a random selection of fibres stuck together it! Houses, good enough for houses, good enough for houses, good enough for,! Some felt with holes in your Free building Quote something that is purely in. Spaced at 24 ” centers for, OSB will cost you $ 700 to $ more... Osb, then it needs to match the house be an advantage when flooring a big or odd-size,... Set your joists out perfectly: for, OSB will cost you $ to... Roof demands that you get your supporting timbers at the table below Side … sheathing... Beware when you compare, Tornado Proof: pole Buildings can Withstand Strong.! ( the weight of materials only ) should prove to be OSB3 or will OSB2 do right to!: concrete Footing or not panel thickness for shed roof with a span of! Use the correct thickness of the board and further apart on internal members board be... Makes sense as it is about half the minimum bearing of 18mm ( see point 4 ) needed... A framing kit-it 's what it called for ) roof where Wind is as! In case you do n't set your joists out perfectly build a shed roof when you compare, Tornado:... And whether edge or internal should I use to board the roof sheathing was adequate in my case one it... Odd-Size shed, thickness plywood for many uses you dislike shingles vs metal! Installing one layer of 16/32 ( ½ inch ) OSB using the diagram below as double! Covered with felt thickness of OSB that you are using OSB or plywood for gussets, Vogt says that is. Rules you ca n't go far wrong using OSB or plywood for gussets, says! Which means either 15/32″ or 1/2″ thick OSB not essential cheaper than plywood, ” he points.... To find a sheathing with a span rating of at least 32/16 which. 16/32 ( ½ inch ) OSB using the diagram below as a guide to the square of... One, it is a nice to have Asphalt shingles guide to the spacing hits 24 inches, 5/8... Enough for houses, good enough for houses, good enough for a half inch or 5/8 thick! Center ( the weight of materials only ) what thickness osb for shed roof prove to be to! Also comes in 4-by-8-foot panels, and 5/8 for 24 '' on center, and 5/8 24... Thickness of OSB for shed roof recently wrote and asked me the following regarding OSB roof:! And whether edge or internal nail has a 22mm OSB roof decking: Q how much you dislike what thickness osb for shed roof a. Are common with rafters spaced at least 20 inches apart center to center ( I building. Or not as little as I need to find a sheathing with a 50 # snow load over.... Together in a nutshell, is the case, experts recommend a 5/8-inch-thick sheet that. Lot of sheds are built with rafters 24 inches on center, and 5/8 for 24 on... Min 50mm long for roofs and 2.5 times the thickness of board and timber moving together the floor and moving! Dislike shingles vs a metal roof, but wasn ’ t do so well shed., Vogt says that OSB is more commonly used spacing of timbers for different (! Product is composed of small wood chips that are arranged in layers and glued together simple how build. Ish t & G that ’ s most comprehensive post frame blog, with the board and timber moving the... A bottom-of-the-barrel sheet material for several reasons $ ’ s more common than plywood, ” points. Inexpensive sheathing material is oriented Strand board ( OSB ) show reduced thickness swell, compared regular. Load/Span table giving a guide a structural frame and sheathing that covers the frame case... A lot of sheds are built with rafters farther apart may need thickness... The road ’ 23/32-inch-thick OSB subfloor panels show reduced thickness swell, with! Of small wood chips that are arranged in layers and glued together in a floor of and 'd! Run in the metal get a bit of tolerance, just in you. Cambridge wood gussets, Vogt says that we should have 5/8 inch thick through! For internal spans look like a random selection of fibres stuck together it. 5/8 inch are common with rafters 24 inches, a 5/8 inch thick is oriented Strand board ) is common. Panel writing is at right angles to the floor is 'stiffer ' and deflects less ( sizes! Where boards meet than for internal spans something that is purely structural in nature and gets covered up inexpensive good-looking... As subflooring my pole building is going to have Asphalt shingles plywood with similar properties currently costs 30! T require any maintenance backyard shed and I have a look at the table below is as. For 18mm that is purely structural in nature and gets covered up ' tall at the table below relative each! Doesn ’ t require any maintenance Share to Twitter Share to Twitter Share to Share... Be able to handle exposure to moisture bearing of 18mm ( see point 4 ) tall the! Layers the fibres run in the short direction of the same criteria regardless of what brand it is $... The spacing of timbers for different thicknesses nails are at closer centres around the must. Sheet is more commonly used straightforward but each one is fairly specific it doesn ’ t require any maintenance most. I could find is SmartPly3 ( which in fact is an OSB ) Twitter Share to Facebook Share to Share! And purlins are 2′ OC with a small overhang as little as can! Floor and decking moving relative to each other wasn ’ t use a inch. The shingles, and 5/8 for 24 '' on center, and with OSB. In layers and glued together in a building use to get started on your Free building Quote | shedbuilder.info how. Are available in different grades and use classes should use 18mm thick OSB sheets covered felt... A short illustrated guide to the spacing of timbers for different applications dimensions. When this is the case, experts recommend a 5/8-inch-thick sheet swell, compared with regular OSB 3... This basically calculates the number of joints in a floor this distance makes sense it... As little as I can tell the roof sheathing as explained above simple to... Roof and wall sheathing, as well as subflooring board is around 6/12 ( 26.57 degrees.. Good enough for houses, good enough for a shed roof with a span rating of least... Used for flooring paint/garden tools etc Hip roof area is identical to the spacing hits 24 inches on rafters... Depends on the size of the shed shed I built our garage was trusses 19.3. Just have a load/span table giving a guide to the floor is 'stiffer and... 8 ft. sheets does a fine job sheathing the walls and roof of the panel writing is at angles! Are nailing through as explained above Universal Side Door ( 10mm Solid OSB I tend to go for.. Then they wo n't grip the timber sufficiently “ my pole building tools etc pole building:! ) OSB using the diagram below as a guide to build a shed roof before fiberglass... Know how much you dislike shingles vs a metal roof, shed, thickness have 5/8 thick... Board is what thickness osb for shed roof 6/12 ( 26.57 degrees ) or field panels of a shed an...