I've never personally had a problem with OSB. EPDM - OSB 3 decking 3mm expansion gap - needed on T&G? Discussion in ' Roofing and Guttering ' started by benjiman, 17 Mar 2015 . Going to be laying new decking for an EPDM covering. Been reading that a 3mm expansion gap should be kept between the boards. A simple design of spinning disks is used in the forming of the strands. pressure of 650 to 800 psi for approximately 4 to 6 minutes. This fact sheet summarizes basic manufacturing steps of OSB and some of its properties Roong 11mm, 15mm, 18mm / Sarking / Site hoardings / Timber Frame Buildings 8mm, 9mm and 11mm / Flooring 15 and 18mm, These values are characterised in the material corresponding to a relative humidity of 65% and temperature of 20 C, These values are characterised between and within boards. For any other project where you need something strong that will be able to withstand some wear and tear, then either construction or industrial-grade boards would be best. It's because I've been nailing too close to the groove. Don't know why but they've been that way since I started in 1970 +/-. Sized for Spacing indicates the panel has been sized to allow for expansion gap between panels. Figures 1 and 2 illustrate strand orientation of typical OSB and a general manufacturing Web section M1: eXPansion GaPs section M2: FiXinG & GluinG section M3: surFace treatMent & Panel FinisHinG section n: squeak among these, oSb/3 is currently the most used product in Europe. Also make sure the plasterboard overlap the osb joins, you don't want join on top of join. "Doesn't swell if you get it covered. Some builders just run a bead of Great Stuff Foam along the butt joint. You're rightthe stuff is already swelled up to full size when you get it. solid status in the market until the mid-1980s. Thanks for contributing an answer to Home Improvement Stack Exchange! OSB board is available in many different sizes, which makes it a great choice for any project. Can the game be left in an invalid state if all state-based actions are replaced? 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. 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). For my walls, I am using a layer of OSB with plasterboard on top, but have seen mixed advice on how much gap should be left, namely above and below (i.e at floor level and around the ceiling) when putting boards up. Home If the gaps are filled, whether with sawdust, other debris, or an intentional sealant, then their ability to absorb expansion will be compromised. Joints must always be on joists. Technical Datasheets Are you a trade or supplier? Click Here to join Eng-Tips and talk with other members! Asking for help, clarification, or responding to other answers. Some common ones include sheathing grade, construction grade, flooring grade, and industrial grade. 1. OSB also is used in furniture, reels, By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. But not until many years? Is this attached to normal 1-1/2" dimensioned lumber material? If total energies differ across different software, how do I decide which software to use? strands are used for the face layers while the smaller strands are laid out in the You not only have exposure during construction but conditions in the attic can cause expansion of the OSB. j. Figure 3 shows siding and I-joist For example, they might suggest applying some kind of tape over the OSB joint gaps and possibly applying a mastic over the tape to smooth it further. @crip659 I think I figured out why. What tools should I use to remove the tongue and groove from floorboards? Never had a problem with OSB. An ounce of prevention. http://www.hammerzone.com/archives/flooring/hardwood/prep1/subfloor.htm. To find the size that is right for your project, you will need to know what type of project its going into. Europe's busiest forums, with independent news and expert reviews, for TVs, Home Cinema, Hi-Fi, Movies, Gaming, Tech and more. For a better experience, please enable JavaScript in your browser before proceeding. Since the mid-1980s, oriented strand board (OSB) has been one of the most commonly The mat thickness depends on the final thickness of the pressed 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. If the OSB comes 8', you had better not space, it will destroy your layout! The most common failure is the appearance of a warp, bow, or buckle in the sheathing used for exterior walls. Moisture meters range in price, but the best models are between $100 and $200 and will help avoid some costly errors down the road. OSB3 is not waterproof; the term moisture resistant applies to the adhesive binder which will not break down in the presence of moisture (within BS EN 300 limits). It could help, but I haven't found it necessary. With many building materials, installers should read the instructions. In OSB manufacturing, phenol formaldehyde (PF) and diphenylmethane diisocyanate (MDI) rev2023.4.21.43403. OSB board comes in a variety of sizes. Not necessarily a problem, though 3/4" is pretty extreme. 2014-2022 Great Lakes Home Performance LLC This number should be more accurate than thickness. One short coming of OSB is its lack of printability 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. in North America. in both commercial and residential building. I find it easier sometimes to just cut a kerf between sheets after it is installed. 2 Answers. 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. Since the moisture content of the strands ranges from 40 to 75 percent, they are dried 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. Is a few mm enough, or does it need to be greater? Larger OSB can be used in several different applications due to its strength and lightweight nature. Hope that helps. For a better experience, please enable JavaScript in your browser before proceeding. Thank you for helping keep Eng-Tips Forums free from inappropriate posts.The Eng-Tips staff will check this out and take appropriate action. you've got OSB (or plywood) that doesn't swell, you are in the minority. Do you need to sister a wall stud? However, if you are roofing a shed, the most common size would be to cut it down into four-foot by eight-foot panels. 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. Our city requires a building, plumbing, and electric inspection. Builder's Business, Diagnosing Problems, New Home Build, Performance Professionals, Recommended | 9 comments. Engineered Wood Products. The roofing company and Maybe lumber yards should start cutting studs at 92 1/2" so we can all be busy cutting that extra 1/4", It's a regional thing. The reason for this is that OSB makes an excellent subflooring or flooring option when you are making any type of deck; whether its one in your backyard or at work. While T&G OSB will not go completely tight on the surface (that's how it's designed), you need it Promoting, selling, recruiting, coursework and thesis posting is forbidden. Make up a little demo showing size change using a balloon with hot air (oh, thats what make those balloons expand and go up, up and away!). The grades of OSB dont vary too much from the thickness and width, but they do have a major impact on how long it will last. You must be kidding!!! Now I'm really confused. Start your subscription today and save up to 70%. I would guess not .but would like to know the practice. That's not a gap--it's a nearly complete lack of engagement. You can create your listing free at DIYnot Local. Your email address will not be published. WebTo get a stiff floor, this is my recommendations: joist spacing should not exceed 16"o.c. For a better experience, please enable JavaScript in your browser before proceeding. Learn more about Stack Overflow the company, and our products. Some of the physical and mechanical properties of a typical OSB. 4. Gaps between the sheets are specified by the manufacturer because the gap allows for a bit of movement - expansion, in particular - to be absorbed without causing any buckling in the roof deck. When properly installed, OSB is a durable and versatile material. Ever measure your OSB? 2.2: Unusual Cases LEave a sheet out in the rain and you'll see what I mean. While specs for different manufacturers will vary, in general, OSB will expand and contract 4x as much on the 4 width of a 4x8 sheet than it does on the longer 8 length. Shelving and platform construction / Pallet manufacture Packaging Boarding up Signboards / Upholstered furniture frames Shoptting / Bar and hotel tting Exhibition stands / Film sets. conditions. OSB board sizing is done using two measurements: The first one is a thickness measurement. as fungicides to enhance resistance of OSB to biological deterioration. I have looked for any information on finding maximum value for gaps between sheathing sheets but cannot find any information. As long as it's not a shear wall, then I can't see how it would be a structural issue. compared to plywood and its higher thickness swelling than plywood under the extreme There was an article a few issues back in JLC showing framing mistakes One of the probs was some OSB on a wall that had been installed tight then buckled. most of the roof problems are probably 1/2 sheeting and 24" center issues "most of the roof problems are probably 1/2 sheeting and 24" center issues "Not sure why that would lead to the sheets being outlined. @r13 no I am adding a master suite to our attic. "For both wood or concrete roofs, caulk all gaps greater than 1/4 as well as transitions between the roof and walls or skylights." I've used osb a few times on walls, never once on a roof. A combination of pressure and temperature is applied to cure the resin and give stiffness 3. It takes a lot of force to overcome the friction of that rough wood when inserting tongue into groove. You can expect a homeowner to have something to say about this situation and they aren't going to call your employee, are they. 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. Not only does it permanently change shape, but its structural strength and permeability change as well. To drive it in, keep a 2 by 4 ft long or more to protect the groove side that you are driving against. 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. Since the nails surround the entire panel, there is no place for the expansion to go except in the space between the studs. Feel any better? However, the membrane tightens up with time anyway. See Figure 1. The width of an OSB board is usually between 0.75 and 11 inches, depending on the manufacturer and/or style you are looking for. Sells a second job if the first looks good? 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. When installing in a running board pattern, do you recommend blocking at the horizontal joints between panels? I don't know as I never use OSB for sheathing, just ply which indeed does have the stamp that says it must be. Thank you so much frammer 52. Also OSB, as well all know, swells in thickness at the edges. 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. In the end I decided it didn't matter too much (it's a workshop and day to day no one will see the roof). Gaps between the sheets are specified by the manufacturer because the gap allows for a bit of movement - expansion, in particular - to be absorbed without causing one of these resins are ready for mat formation, which is the most important process A spacing jig of some type makes keeping things in line much easier. In actuality, vapor diffusion is a temperature driven phenomenon. To accomplish this, the animals must be slaughtered and processed and prepared as finished meat/poultry cuts. A sheet of OSB typically comes in four-by-eight-foot panels, but it can also come in other sizes such as four-by-ten feet or even five-by-ten feet. Just make sure you have a competent uplift load path. This includes everything from sheds, and garages, or even a replacement of an old roof where it will hold up well against weather and movement. OSB in residential construction should not cause any significant problems in terms In conclusion, OSB comes in many different sizes and can be used for several applications due to its strength and durability. For example, if you are building a shed then the most common size would be to have it cut down into four-foot by six feet panels. 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. Joe, never had a problem with swelling in the last 10-15 years. 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 most popular size for walls is the four-by-eight-foot panel which costs around $15. Anything else swells. 1997. Thanks for bringing this info back; if you think it's the best answer you can mark it as "accepted" by clicking the checkmark. By The remedy should be as simple as pulling the nail out. Expansion, creaking, angry homeowners. This is a question that many people have, and its a good one! The modal window is a 'site map' of the most critical areas of the site. The balance of the nailing should be in the center of the slot, 8 to 12 (203mm to 305mm) apart, again leaving 1/32 (0.8mm) between the nail head and the corner post. 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. The dimensions of OSB vary depending on the project you are working on. All common woodworking tools can be used successfully with Kronospan OSB. Most construction lumber equalizes to 9-12% which means that the material will be taking on moisture once it leaves the plant. Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. OSB primarily use lodgepole pine logs averaging 10 to 12 inches in diameter at the 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. Sources of moisture range from rain and snow to the fumes of construction heaters. rev2023.4.21.43403. In general, They are manufactured with an unsanded surface. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. OSB as compared to plywood. Ask the membrane supplier for a recommendation. WebThe gap should be 1/8" between ends. for biological microorganisms, such as fungus. I have looked for any information on Fill OSB gaps with something like Check for any damages before tting. Avoid issues of warping panels by installing in horizontal running bond patterns with gaps between the panels. Kronospan - OSB2 / OSB 3, OSB can be sawn, cut, milled and nailed. WebUpdated EGGER OSB 3 boards according to EN 300 are multi-purpose boards and can be used for numerous applications in dry and humid conditions. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? Does methalox fuel have a coking problem at all? I can tell many horror stories about OSB not being gapped and seeing that happen. mostly the swelling is only minor enough to telegraph the sheet positions and edges through cheaper three tab shingles. Usually 2 blocks are the most you need, sometimes only one. The best practice is to check the material with a moisture meter and wait until the levels are closer to 9-12%. Opposite direction of the face and core layer strands give very high bending properties

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