For years now I have gone back after the roof is sheeted and used a thin kerf blade and cut the butt joints of the osb. "Man, they're the worst!AitchKay. Some just use the blade on their combo square, others have something made up. However, if you are roofing a shed, the most common size would be to cut it down into four-foot by eight-foot panels. I've used it literally hot of the press and it measures the same. How much gap is acceptable with tongue-and-groove OSB subfloor? You're rightthe stuff is already swelled up to full size when you get it. This site can be cut down into smaller sizes for your project needs depending on how much room you have and what its going into. A simple design of spinning disks is used in the forming of the strands. Should I Use 3/4 Inch Tongue and Groove OSB for Exterior Sheathing. OSB as compared to plywood. I have looked for any information on When the panels expand, if there is no room for that expansion to be absorbed, then the expansion bows out wherever it can. Otherwise you get that irritating layout creep. Webgaps the edges as the floor is assembled. Individual "A lot of the reported cases of swelling and failure are on garages where the moisture gets to it from the underside. How to combine several legends in one frame? Wet construction conditions Assuming the OSB is installed at a reasonable moisture level of 9-12%, its important to maintain that moisture level without adding a lot of extra Years ago a mining process company did its research for a client and the client got a report the equivelent to penciled info on a legal pad in the mail. I can tell many horror stories about OSB not being gapped and seeing that happen. Not moisture. A spacing jig of some type makes keeping things in line much easier. In actuality, vapor diffusion is a temperature driven phenomenon. I can't tell the difference between them. It stands for Oriented Strand Board, which means that its not your typical plywood or particleboard. For a better experience, please enable JavaScript in your browser before proceeding. This will give you the actual size of the board after it has been dried and cut, which means that it may not be exact when you purchase an OSB sheet. OSB can also be used for roofing if you are looking for something lightweight and strong. Click Here to join Eng-Tips and talk with other members! OSB is not used for applications where there is direct contact with a moisture source, The tongue and groove (T&G) of the sheets should be driven snug. This is a dialog window which overlays the main content of the page. The number of OSB mills increased by more than 50 percent from 1990 to 1997. OSB boards come in a variety of sizes, thicknesses, and grades to choose from. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? > . WebThe expansion or contraction of OSB with temperature and humidity is uniform, so it is an excellent choice for large projects that require panels to fit tightly together, such as Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. "Doesn't swell if you get it covered. Perforator values are related to boards with moisture of 6,5%. Laying an EPDM membrane directly over the panels does pose a challenge: the gaps between panels may telegraph through the membrane and this may be unsightly. Plywood in my experience will swell faster than OSB in todays market. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Sells a second job if the first looks good? If the time between the OSB is made and the time it is installed is too short, or if the material is stacked and stored in a way that prevents the moisture level equalization, then it might be installed dry and will equalize after installation. 2 Answers. I dont think they would have any problems because theyre not subject to the same vapor and temperature differences. Sounds like the problem might be excessive moisture drive from the inside, possibly a lot entering the walls through air infiltration into the wall cavities if the house is positive pressure. And, as always, sheathing joints should be overlapped. It may not display this or other websites correctly. I've boarded a roof in OSB3 prior to laying an EDPM membrane. Do not try to drive them tight, although in some cases it might be needed in order to keep a straight run. You must log in or register to reply here. They came back and spent more even if the first research showed their first try wasn't feasable. Making statements based on opinion; back them up with references or personal experience. - Wood Rated, OSB Board Uses UK: 4 Key Applications Of OSB - Wood Rated, Is Acacia Wood Good for Outdoor Furniture: Answer by A Pro, Acacia Wood Vs Teak: Everything You Need to Know, How to Spray Paint on Wood in Simple Steps, Whats The Hardest Wood in The World: Answer By A Pro. The advantages of using EGGER OSB is as follows: High dimensional stability High static load Optimised for application Comprehensive stock range available It doesn't have anything to do with swelling. on environment as compared to plywood. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The one-by-five-eighths-inch board is also the most common size used for building a chicken coop because of its sturdiness and ability to protect against predators. I've never had a problem not spacing the fir sheathing on a roof in 25 years. JavaScript is disabled. The modal window is a 'site map' of the most critical areas of the site. as a building material. Some builders just run a bead of Great Stuff Foam along the butt joint. A combination of pressure and temperature is applied to cure the resin and give stiffness At least around here it does! Are you a trade or supplier? Do any of you do this for sub roofing. With OSB at about 6 bucks a sheet, why would I use fir? OSB was first produced in Canada in 1964, but it did not find its Thickness: The thickness of the OSB board will determine how strong it is. It was a windy day when I glued the EDPM down, and this caused the membrane to be slightly lifted rather than depressed over the gaps. It may not display this or other websites correctly. Doesn't swell if you get it covered. It used to get me that every sheet was stamped "space panels 1/8" at the edges" or something like that, and I'd tell the guys to do it and they'd look at me like I was from Mars. OSB can be used in several different applications due to its strength and lightweight nature. The same thing can happen if roofing shingles are kept too tight to each other. "For both wood or concrete roofs, caulk all gaps greater than 1/4 as well as transitions between the roof and walls or skylights." Python script that identifies the country code of a given IP address. I'll admit to not doing that all the time although I do space them the long way. role in the world market. The most common types of projects are residential and commercial, but there are also other types such as agricultural or industrial. How to have multiple colors with a single material on a single object? Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a parts function at the center of their design considerations. How to check for #1 being either `d` or `h` with latex3? What's the cheapest way to buy out a sibling's share of our parents house if I have no cash and want to pay less than the appraised value? Get notified of new posts and changes that affect your home or business. A similar question once here at BT brought out a couple photos and stories by guys who had learned the hard way. What are the different grades of the OSB Board? Connect and share knowledge within a single location that is structured and easy to search. This website uses the TMDb API but is not endorsed or certified by TMDb. 4. That's not a gap--it's a nearly complete lack of engagement. Moisture meters range in price, but the best models are between $100 and $200 and will help avoid some costly errors down the road. Expansion, creaking, angry homeowners. This whole talking-to-you thing is like double punishment. Login. This is another common use for OSB because it holds up well against weather and movement. Yes, in order to avoid dilation stress on the board edges. Expansion gaps are narrow distances that must be provided at the panel joints Products Case Studies Support Where to buy Customer Portal myEGGER Back to EGGER.com EGGER - More from Wood Building Products EGGER OSB FAQ's Articles in this section OSB Advantages? The -inch sheet is used when there will be more wear and tear involved such as an outside deck or fence; this type of thickness can handle both water and movement well. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I haven't been burned by it myself, but I used to drive by a cheap housing development where if the sun was right, you could see every sheet outlined through the shingles. Not necessarily a problem, though 3/4" is pretty extreme. OSB in residential construction should not cause any significant problems in terms Close this window and log in. Here are some examples: This is the most common use of OSB; this includes everything from small garden sheds to larger utility ones. Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? compared to plywood and its higher thickness swelling than plywood under the extreme If the sheathing panels are butted flat together with no gap, the panels will not only buckle between the studs, but will crush along the edges causing a small ridge line. When a gnoll vampire assumes its hyena form, do its HP change? Good luck. 3mm-5mm expansion gaps between each board at every join and a 5mm-8mm gap around the edge between the boards and the wall. Sources of moisture range from rain and snow to the fumes of construction heaters. The only sheathing problem I've ever had was delaminating plywood. wax and other chemicals also can be applied during the blending process. That happened to me once on a wall that didn't get stood up at the end of the day, and a few times on floor plywood. 1/2" or 5/8" sheet rock lid goes up against the ceiling joists, that leaves 96 1/4" or 96 1/8" for sheet rockon the walls (vertically or horizontally). https://files.engineering.com/getfile.aspx?folder=2d6fd1f1-010c-4b08-9e2a-f, Low-Volume Rapid Injection Molding With 3D Printed Molds, Industry Perspective: Education and Metal 3D Printing. Any standard timber joints can be used for. This is a particular problem with the OSB products; these also swell at the edges if exposed to excessive moisture. Engineered Wood Products. The Fora platform includes forum software by XenForo. Sound insulation / isolation after knocking hole in wall, Impact of sound insulation on kids bedroom above cinema room. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. of the panels for special applications. It only takes a minute to sign up. The code requires a 3/4" subfloor as a minimum, but there is no maximum until you exceed the physical limits of the structure. Been reading that a 3mm expansion gap should be kept between the boards. Like drilling a dry hole for oil or NOT striking a rich gold vein. - M.K. Never said you did, and it is nice to use fir as it is lighter, alass that is not in the cards. America and Europe and have the main share in the structural wood composite market. The panels are later sanded to improve their surface roughness. Connect and share knowledge within a single location that is structured and easy to search. It happens to get cold enough to condense inside the OSB which causes it to swell. That said, we always used BIG hammers--six pound sledges--along with a "beater block" consisting of a 3-5' 2x4. On roofs always horizontal Have never had any problems with buckling Until recent last April removed old siding from small split level home thermo ply was rotted so we removed thermo ply installed osb 2 x4 walls 2 ft centers vertical same way thermo ply was installed after osb was installed we installed house wrap then siding Job looked perfect In dec or Jan received call from home owner telling me siding was buckling It is not siding Why would this happen on this job and not others confused we did install a layer of house wrap and a layer of 3/8 fanfold foam per customers request could it be condinsation/ I thought maybe they changed glue in osb have never had any problems in past and why did it only buckle in winter months when furnace was running driving me crazy. I know that when sub flooring with OSB that it is sugested that you leave an expansion gap of 1/8 inch. It is usually used when building something that wont be exposed to too much wear and tear outside. Post was not sent - check your email addresses! Thanks. 2. Great work by London GRP Roofing! RELATED: How to Smooth OSB Board: A Comprehensive Step by Step Guide. That's not a gap--it's a nearly complete lack of engagement. Though wall framing was not part of my scope but I noticed gaps of 3/8" to 3/4" at the horizontal connection of plywood sheathing. The boards should be stored in their intended installation area for a minimum of 48 hours to acclimatise to the surrounding temperature and humidity. See our Floor, Roof and Wall Panel Installation Technical Resource Sheet for more information. But for typical gravity only walls, It's probably not going to have a bad effect on the structure. WebAPA extreme linear expansion values, for an eighty foot long roof, assuming a 3-inch linear expansion per eight foot panel length, an average 1/8-inch gap between sheets and an average 1/8-inch fastener/ end crushing per panel, would result in a net linear lengthening of the roof of zero. A decline in plywood manufacturing in many countries, due I had built a roof over our front porch using OSB and did not leave an expansion gapwhat a mistake! such as soil. I cannot imagine a better lawsuit waiting to happen than stamping sheet goods as requiring spacing, then producing them at a dimension that makes that spacing impossible with standard layout practice. This number should be more accurate than thickness. Figures 1 and 2 illustrate strand orientation of typical OSB and a general manufacturing Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Promoting, selling, recruiting, coursework and thesis posting is forbidden. This is a question that many people have, and its a good one! So the contraction of the joist brings the OSB onto a collision course? to the panel. one of these resins are ready for mat formation, which is the most important process of OSB in the future. Matt. Im hoping after running heat in winter that it mite dry out and fix problem. in North America. Jobsite Saw PRO has a wider table, a new dust-control port, and a more versatile fence, along with the same reliable safety mechanism included in all SawStop tablesaws. You are doing this for someone else by contract? Since the nails surround the entire panel, there is no place for the expansion to go except in the space between the studs. Why would I not tell the truth. Some of the advantages of OSB over other wood based products are as follows: Table 1 displays some of the physical and mechanical properties of sheathing grade I would guess not .but would like to know the practice. trailer liners and recreational vehicle floors. Will I fail inspection with gaps this big? WebFrom an unventilated cold roof with traditional GRP delaminating from a plywood deck with no expansion gaps to a cold roof with ventilation, using #Flexitec2020 on an OSB tongue and groove deck with expansion gaps to the wall abutment. 1997. An expansion gap of 1/8 inch was used and the areas I felt were too tight I ran the skillsaw along the seam with the blade set at 3/4 inch. Can I make the contractor redo a roofing job because he didn't replace delaminated plywood? OSB wall sheathing comes in standard 4-by-8-foot Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. This particular size is also easy to find because its a standard size that lumberyards and home improvement stores typically carry. As with most construction failures, there is no single smoking gun problem and no silver-bullet solution. It takes a lot of force to overcome the friction of that rough wood when inserting tongue into groove. We had the house reroofed this year by a roofing company with me replacing the the porch roof sheathing. An employee would get a warning or two before they were no longer an employee. An OSB board is a type of engineered wood made up of cross-laminated layers. Underlayment? Helping You to Do It Yourself! If there was no foam on the exterior, it may be able to adequately dry to the outside without too much trouble, but the fan fold is acting as a vapor barrier, keeping the moisture in the OSB. Registration on or use of this site constitutes acceptance of our Privacy Policy. of its dimensional stability. For example, if you are building a shed, the most common size to use would be to cut it down into four-foot by six feet panels. As stated in APA literature: 1/8 inch spacing is recommended at all panel edge and end joints (subfloor, wall and roof) unless otherwise indicated by the manufacturer. The nails should be spaced 6 inches around the edges of a sheet and 12 inches in the middle. Figure 1. I know that recommended gap for expansion of sheathing is 1/8" to 1/4" minimum but what I found on site was excessive. The remedy should be as simple as pulling the nail out. Well, this depends on what type you are purchasing. While most of these sources seem unavoidable, they are at least manageable with good site management and timing. Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. Guidance on the use of OSB in load-bearing applications is given in DD CEN/TS 12872. are two types of water-resistant resin commonly used as binder. Sure wish I would of seen your advise earlier. Home 3. Feel free to get ahold of me if you need more clarification or advice. All common woodworking tools can be used successfully with Kronospan OSB. Sagging between trusses yes. WebThe gap should be 1/8" between ends. The mat thickness depends on the final thickness of the pressed This material can handle both weather and movement well which makes it perfect for any type of wall that you need to build; whether its in your backyard or at work. This fact sheet summarizes basic manufacturing steps of OSB and some of its properties Plywood is much worse than OSB in my opinion. Kronospan - OSB2 / OSB 3, OSB can be sawn, cut, milled and nailed. Wet construction conditions Assuming the OSB is installed at a reasonable moisture level of 9-12%, its important to maintain that moisture level without adding a lot of extra moisture during construction. 94969.19 In the beginning there was Breaktime "Maybe lumber yards should start cutting studs at 92 1/2" so we can all be busy cutting that extra 1/4" off, too.". And when you get to be the boss, you can do the same. *Eng-Tips's functionality depends on members receiving e-mail. Video-Installing OSB correctly Was this If you are building a shed, the most common size to use would be to cut it down into four-foot by six feet panels. :) (expansion, contraction, angry homeowners), "creaking, angry homeowners. A general flow chart of OSB production. Feel any better? Walls usually aren't subject to much weather. Corrosion resistant fasteners should be used where OSB is part of a load bearing structure. The size that you need will depend on the project you are working on. dry storage pallets and industrial tabletops. Can OSB Board be Used Outside? 28 Apr 2023 11:01:29 Tiling over old 2x6 tongue and groove subfloor. For example, a four-by-eight-foot panel that is half an inch thick can cost around $20. such as profiling with tongue and groove edges or the raised screen pattern on one I've never once spaced the sheathing on a roof before and never once had a problem. A helpful guide that clarifies food business categories with their corresponding definitions and license fees. what do U need pictures for, just fire them for not doing what ya tell them to do. Would you ever say "eat pig" instead of "eat pork"? Joe, never had a problem with swelling in the last 10-15 years. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. as fungicides to enhance resistance of OSB to biological deterioration. In conclusion, OSB comes in many different sizes and can be used for several applications due to its strength and durability. This site is protected by reCAPTCHA and the Google. Depending on the process, a certain percentage of When you purchase through links on our site, we may earn an affiliate commission, which supports our community. All this BS with OSB makes me wonder why people keep using it and not installing it right, or when installing it right you still have problems. This includes everything from sheds, decks, fences, or even roofs where it will hold up well against weather and movement making it the perfect material for any project that you have going. You've got that right!! Don't forget to leave expansion gaps for your LVP where it meets the wall as well. Which one to choose? What was the actual cockpit layout and crew of the Mi-24A? This particular size is also easy to find because its a standard size that lumberyards and home improvement stores typically carry. Maybe we're sposed to frame on 16.02" centers! Typical vinyl and aluminum siding have plenty of air-gaps behind them without having to do anything. Table 1. This can transfer to a visible bump in the roofing. Websuitable expansion gaps Wood Based Panels OSB (Oriented Strand Board) Introduction This information sheet relates primarily to OSB panels used in construction OSB/3 is widely used in construction for site hoarding, flooring, roof panels and for wall panel sheathing in timber WebFrom an unventilated cold roof with traditional GRP delaminating from a plywood deck with no expansion gaps to a cold roof with ventilation, using #Flexitec2020 on an OSB tongue and groove deck with expansion gaps to the wall abutment. Boards with straight edges need 2-3 mm dilatation gap at the edges of the boards for possible moisture expansion. A minor scale definition: am I missing something? A schematic illustrating strand orientation of a typical OSB. The reason for this 1/8" gap is to take into account the expansive properties of OSB. I'm all mixed up. 2014-2022 Great Lakes Home Performance LLC No. The last nail to the edge should be no closer than 6", to allow the tongue to ease up the groove if need be. Using T&G OSB this will not be possible. to 5 to 10 percent moisture in large, rotating single-pass or triple-pass dryers with I use a 8d nail. As the humidity moves through an insulated wall assembly, the temperature drops (during heating season) as it approaches the exterior sheathing. If you've started out badly or for other reasons can't get your joints tight, you'll have to float backing to tie the sheets together. If you're using "h-clips" then this will do that for you, if not, I put a 2' nail between the sheets for expansion. . sanded, it can even be used as substrate for overlays for special structural applications. Technical Datasheets Each one has its own specific use.-Sheathing grade is the thinnest type of OSB that you can find; its used to protect against water but doesnt hold up very well against wear and tear. OSB production is expected to continue to increase in North To learn more, see our tips on writing great answers. Already a Member? Medite Moisture Resistant (MR) MDF Datasheet, Medite Fire Retardant (FR) Euro Class B Datasheet, Medite Moisture Resistant MDF (MR) - Industrial - Datasheet, Safety Data Sheet for Moisture Resistant (MR) MDF, Safety Data Sheet for Fire Retardant (FR) MDF. If total energies differ across different software, how do I decide which software to use? Oriented Strand Board and OSB 2 Is designed for use where a high performance board is required which provides dimensional stability and load bearing capabilities for use in dry conditions. A zigzagging first row will result in larger gaps in subsequent rows. I find it easier sometimes to just cut a kerf between sheets after it is installed. Would you ever say "eat pig" instead of "eat pork"? Joints must always be on joists. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Thanks for bringing this info back; if you think it's the best answer you can mark it as "accepted" by clicking the checkmark. Copyright 2000-2023 M2N Limited E. & O.E. The fence can be used to keep things in or out, but either way will hold up due to the material that you are using; this includes not only fences around backyards but also industrial ones. It absorbs more moisture because there is far more exposed endgrain from the chips. A minor scale definition: am I missing something? ; floor joist span should be designed conservatively (building code minimum is not conservative), Learn more about Stack Overflow the company, and our products. Limiting the number of "Instance on Points" in the Viewport, Short story about swapping bodies as a job; the person who hires the main character misuses his body. Forest products companies are utilizing raw materials more efficiently with better If it isn't you'll have noise and/or flex, things the T&G arrangement is meant to prevent. We know from experience that 3/8 of an inch is a pretty safe dimension 4 with stucco, manufactured stone veneers, wood claddings or other claddings like fiber-cement that lie flat against the housewrap and OSB ( Photograph 3 and Photograph 4 ). I don't space decking either. Most stores cut down their boards to meet standard sizes before drying them fully so they are not too big or small when finished. Some common ones include sheathing grade, construction grade, flooring grade, and industrial grade. As the name implies, Oriented Strand Board is made of flakes of wood which are oriented in an engineered pattern to provide strength and allow for expansion in a planned direction. Generally, strand size is approximately 0.5 inch by 3 inches Is this attached to normal 1-1/2" dimensioned lumber material? 2.2: Unusual Cases Wow. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Parabolic, suborbital and ballistic trajectories all follow elliptic paths. I am curious about the inspection, by whom? This is the standard thickness that is used for most projects, such as walls, floors, and roofs. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework. The No. Hence my post here. They just gap the walls, no roofs. Already a member? It would even be advisable to keep a log of material moisture readings for reference in case problems arise later. frames, decorative wall paneling, shelving, packaging and crating, pallet manufacture, No, I'm not kidding. The one-by-five-eighths inch sheet can also be used for building an outdoor shed or any other similar structure where it wont be exposed to too much damage. For a better experience, please enable JavaScript in your browser before proceeding. Some of the physical and mechanical properties of a typical OSB.
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