Some builders just run a bead of Great Stuff Foam along the butt joint. The size that you need will depend on the project you are working on. Are you a trade or supplier? JavaScript is disabled. Required fields are marked *. Figure 1. Size of the strands The only sheathing problem I've ever had was delaminating plywood. America and Europe and have the main share in the structural wood composite market. If you need to find a tradesperson to get your job done, please try our local search below, Been reading that a 3mm expansion gap should be kept between the boards. 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. This is another common use for OSB because it holds up well against weather and movement. > And can anybody in SC confirm the precuts are 93". Tu stultus esRebuilding my home in Cypress, CAAlso a CRX fanatic! I dont think they would have any problems because theyre not subject to the same vapor and temperature differences. Not only does it permanently change shape, but its structural strength and permeability change as well. The best answers are voted up and rise to the top, Not the answer you're looking for? trailer liners and recreational vehicle floors. No wonder you didn't understand me. Then a week of rain and the siders show up and proceed to hang 10 squares of Hardie plank on it. BSI-038: Mind the Gap, Eh Without the 1 of foam (your 3/8 may not be adequate), the OSB stays cold and when the interior moisture drives through the wall from the interior, it gets colder as it approaches the OSB. Never had a problem with OSB. 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. If total energies differ across different software, how do I decide which software to use? Figure 2. 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. One guy said he'd been butting tight for years on a hundred houses or so, but finally one place had enough moisture swell the osb to buckle the sheets and he had to strip it and re-roof. Suggested Materials for Warm Deck Flat Roof, Is it ok to Nail into the EDGE of OSB 3 18mm T&G (for Fascia/drip batten). Sheets must have a 1/8-inch expansion gap between them and should be secured to the rafters with 8d nails. With some understanding of the physical properties of OSB, we can determine the most likely cause. tongue and groove First time HT setup with some of my dad's old kit. I've done it like this for 25 years. I wouldnt recommend solid blocking with mechanical fasteners. 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. Perforator values are related to boards with moisture of 6,5%. 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. 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. Is there a generic term for these trajectories? You are correct on your comment. The size that you need will depend on the project you are working on. 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 Since the moisture content of the strands ranges from 40 to 75 percent, they are dried Thanks for contributing an answer to Home Improvement Stack Exchange! Like I said before, on roof sheathing I don't space anything. Excellence is its own reward! Helping You to Do It Yourself! An employee would get a warning or two before they were no longer an employee. Actually it has more to do with contraction of the rafter/joist, the OSB is pretty stable. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. Sells a second job if the first looks good? mostly the swelling is only minor enough to telegraph the sheet positions and edges through cheaper three tab shingles. I have just been to review the floor framing of a site. 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. Already a Member? Making statements based on opinion; back them up with references or personal experience. 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.". They just gap the walls, no roofs. Never said you did, and it is nice to use fir as it is lighter, alass that is not in the cards. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. Asking for help, clarification, or responding to other answers. In a general OSB plant, forming lines are about 6- to 8-feet wide. Should I Use 3/4 Inch Tongue and Groove OSB for Exterior Sheathing. in a drum-type rotating blender. I've never once spaced the sheathing on a roof before and never once had a problem. 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. > 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. Also if I use normal boards, without the T&G and I put the 3mm expansion gap between all the boards, what happens over the joints when the rubber goes Salim HizirogluFAPC Wood Products Specialist. How can I remove just one tongue-and-groove subfloor board? on environment as compared to plywood. desired dimensions. Do any of you do this for sub roofing. Some OSB manufacturers won't warrentee their product used as roof sheathing on an unvented roof, because while OSB is slower to absorb moisture than plywood it's also slower to release it and the aspen and poplar used has no resistance to decay. Can the game be left in an invalid state if all state-based actions are replaced? WHY gap OSB - Fine Homebuilding Why do you think they stamp the spacing infoall over the stuff?Had to go look and see if you are correct,NOT! Place boards with their long sides perpendicular to the joists. Right in the middle of each sheet there's a big hump. Don't know where Born2hammer is from.John, Edited 1/25/2009 11:29 am ET by JohnCujie. But not until many years? Can anyone point me to literature on why gapping OSB is necessary and maybe photos of OSB that was not correctly gapped. Most construction lumber equalizes to 9-12% which means that the material will be taking on moisture once it leaves the plant. But in spite of being stamped "sized for spacing" when I put a tape to it, most of the OSB we get is a full 96" by 48". The tongue and groove (T&G) of the sheets should be driven snug. These spacing recommendations may not be adequate for buildings over 80' in length or width. WebOSB 3 Is designed for use where a high performance board is required which provides dimensional stability and load bearing capabilities especially suited for use in humid Face and core layer strands are mixed separately with an exterior binder 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 See Figure 1. At least around here it does! 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. Figure 3. Were they supposed to be braced or shear walls? You are using an out of date browser. They came back and spent more even if the first research showed their first try wasn't feasable. Oriented Strand Board and or if you are doing it yourself you can find suppliers local to you. of the panels for special applications. The best practice is to check the material with a moisture meter and wait until the levels are closer to 9-12%. Most products are minimally effected today, but there are many brands, some may not. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? All OSB has a coating to prevent. Put up new Hardie and shim the #### out of it and now it looks half way decent. I use cdx fir and space the walls. conditions. Fir is nice, but the home builders don't want to pay for it! To learn more, see our tips on writing great answers. . 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. I assume youre talking about a TGI joist. Learn more about Stack Overflow the company, and our products. Levelling? 5. Good advise. Expansion, creaking, angry homeowners. What was the actual cockpit layout and crew of the Mi-24A? What sizes does OSB come in? Sagging between trusses yes. Does methalox fuel have a coking problem at all? Joining two areas of tongue and groove flooring in a room - disguising the join, Tile to tongue & groove paneling transition and window casings, Replace strips of tongue and groove subfloor. panel and its density. Look, just send me to my drawer. How to check for #1 being either `d` or `h` with latex3? The most common size would be to cut it down into four-foot by six feet panels. Installing without an expansion gap Best practice is to leave a minimum of 1/8 space between panels on the vertical and horizontal edges to allow them to expand. Looked like ####. The No. Restoration Guide The code requires a 3/4" subfloor as a minimum, but there is no maximum until you exceed the physical limits of the structure. The modal window is a 'site map' of the most critical areas of the site. OSB Advantages However, if you are roofing a shed, the most common size would be to cut it down into four-foot by eight-foot panels. In that I certainly agree with Jack. Can OSB Board be Used Outside? What is the standard width of OSB boards? The thickness of sheathing panels is typically 5/16 inch . The dimensions of OSB vary depending on the project you are working on. By joining you are opting in to receive e-mail. Hence my post here. Figures 1 and 2 illustrate strand orientation of typical OSB and a general manufacturing New blog post from our CEO Prashanth: Community is the future of AI, Improving the copy in the close modal and post notices - 2023 edition. Do not try to drive them tight, although in some cases it might be needed in order to keep a straight run. Installing vertical panels While some manufacturers say its okay, it doesnt really play out well in the real world. Joe, never had a problem with swelling in the last 10-15 years. Larger Kronospan - OSB2 / OSB 3 And they also must have been taught to always ignore written instructions. However, personal experience has Word order in a sentence with two clauses, Using an Ohm Meter to test for bonding of a subpanel. PFS Research Foundation. "Doesn't swell if you get it covered. Face and How to combine several legends in one frame? OSB is also commonly used when building walls, either inside or outside. Shelving and platform construction / Pallet manufacture Packaging Boarding up Signboards / Upholstered furniture frames Shoptting / Bar and hotel tting Exhibition stands / Film sets. One by means that the wood measures one inch thick, while a five by is five inches thick. Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. Select the supplier or trade you require, enter your location to begin your search. Corrosion resistant fasteners should be used where OSB is part of a load bearing structure. This is a dialog window which overlays the main content of the page. If you are looking for a material that can withstand complete exposure to water, then you will need to use something else such as plywood. Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time.