to the panel. flow chart of OSB, respectively. The code requires a 3/4" subfloor as a minimum, but there is no maximum until you exceed the physical limits of the structure. trailer liners and recreational vehicle floors. Citadel's $300M gamble, 3 Musketeers, Evil Dead Rise, Superman 4K, Three Colours 4K, and good TV! You must be kidding!!! Jeff and Cameraman had the answers I liked the best. OSB 3 decking 3mm expansion gap - needed Our city requires a building, plumbing, and electric inspection. compared to plywood and its higher thickness swelling than plywood under the extreme Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. 2 Answers Sorted by: 2 You could add 3/4" sheets of plywood/OSB to the subfloor if you wanted. You need to have a blower door test and thermal infrared camera inspection to determine specifics. http://www.homeinnovation.com/~/media/Files/Reports/Construction-Guide-to-Next-Generation-High-Performance-Walls-in-Climate-Zones-3-5-Part-2-24-Walls.pdf, Energy Efficiency and the Modern Home Builders Business, Renewed and Retroactive Tax Credit for Builders, Michigan Energy Code Update: Part 2 Compliance Paths. j. In OSB manufacturing, phenol formaldehyde (PF) and diphenylmethane diisocyanate (MDI) Similar to other wood products, OSB also is prone to decay when conditions are optimum Let me guess, you're from the Carolinas, right? Also make sure the plasterboard overlap the osb joins, you don't want join on top of join. Yes, I will do that. This is another common use for OSB because it holds up well against weather and movement. Centers. -Dik. Feel free to get ahold of me if you need more clarification or advice. Since the nails surround the entire panel, there is no place for the expansion to go except in the space between the studs. 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. If youve been around the building industry for the last twenty years or so, youve seen plywood being used less and Oriented Strand Board (OSB) being used more for sheathing on walls, roofs, and sub-floors. an inlet temperature of as high as 1,250oF. Fir is nice, but the home builders don't want to pay for it! Using T&G OSB this will not be possible. However, if you are roofing a shed, the most common size would be to cut it down into four-foot by eight-foot panels. What is the standard width of OSB boards? Right in the middle of each sheet there's a big hump. determining properties of the panel. 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. 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. possible buckling due to expansion. I've never once spaced the sheathing on a roof before and never once had a problem. 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. In general, A zigzagging first row will result in larger gaps in subsequent rows. Figure 2. I do see osb on some developments, but people who I work for use fir. When I am setting subfloor alone, I keep my screw gun, 2" screws and some small scraps of plywood handy. Been reading that a 3mm expansion gap should be kept between the boards. > Vinyl Siding A few mm is fine, any more and the sealant will slump. One short coming of OSB is its lack of printability OSB board comes in a variety of sizes. You are doing this for someone else by contract? The last nail to the edge should be no closer than 6", to allow the tongue to ease up the groove if need be. sheathing - Should expansion gaps in an OSB3 roof be Dried strands are classified into two sections using various sizes of screen. I encourage you to download and carefully read a recently published wall building guide. Making statements based on opinion; back them up with references or personal experience. 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. If it isn't you'll have noise and/or flex, things the T&G arrangement is meant to prevent. This is a particular problem with the OSB products; these also swell at the edges if exposed to excessive moisture. Perforator values are related to boards with moisture of 6,5%. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? That's great stuff. Can 3/4' Oak Hardwood floor be put over OSB? - Houzz He has pictures and experience in the article. Does methalox fuel have a coking problem at all? Wait a minute, the precuts in SC were 93". Weyerhauser's stuff is just shy of 48" wide but it's exactly 96" long, which means that it works fine to gap it out on the long edges - usually makes no difference there anyway - but if your structure is more than 24' long you need to trim the sheet to length every 3rd one or so in order to maintain truss or stud spacing. Joints must always be on joists. You don't need to find a joist with osb t&g, I always lay at least three boards down before nailing to make sure they are lined up. Fill OSB gaps with something like Most stores cut down their boards to meet standard sizes before drying them fully so they are not too big or small when finished. In our climate zone (Michigan and PA look to be the same) the most robust wall seems to be 24 with 1 of foam over OSB exterior sheathing. Ask the membrane supplier for a recommendation. 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 role in the world market. 5. Zinc borate and oxine copper are sprayed Most construction lumber equalizes to 9-12% which means that the material will be taking on moisture once it leaves the plant. See the recommendations for installing temporary Expansion Joints for Floors in Large Buildings on page 3. 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.