The values are 95 percentiles (5 percentile values in the case of swelling in thickness) … I see big trouble brewing. Swelling of panel edges and uneven swelling of individual wood particles or chips may be expected on OSB sheathing panels exposed to high moisture condi-tions. 1.5 mm/m. I'd tend to fall in the "OSB furniture sounds like a terrible idea" camp, but anyway... Two steps come to mind - one is to seal the cut edges thoroughly using either a thin epoxy or a varnish/polyurethane type of product, to both bind small slivers and prevent or at least slow moisture intake and resultant edge swelling. 2 Manufacture 2.1 The board is manufactured to the specification detailed in BS EN 300 : 2006 for OSB/3, relating to loadbearing oriented strand boards used in humid conditions. Straight edge. 10%. Osb, in its current state of development, is more sensitive to moist conditions. OSB had reputation of edge swelling when exposed to moisture, but that issue was address several years ago … 6 4) Formaldehyde content – class 1 … Job-site handling • OSB panels lie flat and are engineered for consistent quality without knots or voids. The average coefficient of hygroscopic thickness swell is about 0.01 inch per inch of original thickness for each 10 percent change in equilibrium … This can cause a rough, uneven surface that may detract from the appear-ance of smooth panels. The construction industry has approved OSB as a substitute for plywood. If edge swelling occurs, the OSB stays flat at the seams. It dries out relatively quickly, and the swelling is usually not enough to affect floor or roof finishes. Plywood is not prone to edge swelling like OSB. Permanent edge swelling of an OSB sub-floor panel sample after it was floated on water for 72 hours and then re-dried (photo c/o author) Fig 4. 12-08-2009, 06:28 PM desertsun41 : Location: Houston, Texas. Manufacturers insist that OSB's moisture problems have been corrected, thanks to the development of water-resistant edge seals. SWISS KRONO OSB/3 - board with load transfer properties, suitable for 1-2 usage class according to PN-EN 13986 applications in moderate humidity conditions. I-PAN OSB board is made of layered poplar strands which are bonded and pressed at hot temperature, in compliance with EN 300. EN 324-2. For panels of balanced construction, edge swelling could reach a maximum of about 0.002 inch at each edge for each 10 percent increase in equilibrium relative humidity above 40 percent. ... the possibility of shrinking and swelling due to variations in humidity is highly reduced.Raw material and technology determine the quality of a panel of engineered wood such as I-PAN OSB… Hmmmm ok. That was a pain, too, because the swelling resulted in a wavy, bumpy floor that contributed to the squeak problems. The special strand geometry and strand orientation in the surface layers, as well as the low-emission glueing, ensure the … OSB has the appearance of giant cornflakes pressed together to form structural panels in sizes similar to plywood, such as 4' x 8' x 5/8". Altering panel composition and density distribution 5. 4 2) Moisture content OSB 1, OSB 2, OSB 3, OSB 4. Edge straightness tolerance. OSB takes longer to get wet than plywood but also … This study was carried out to determine the effects of using cast-polyamide on the thickness swelling (TS) of oriented strand board. OSB: Floor Covering vs. Subfloor . Although OSB 3 is water resistant, once water gets into the edges and stays there, the boards will start to deteriorate sospan, Apr 5, 2017 #2. c j beattie New Member. Is the density of the OSB variable with the thickness of the boards? OSB is installed vertically over the entirety of the exterior. The edge 30mm of some 18mm OSB has swollen out marginally to 20mm because of some rain. As you can see, both OSB and plywood sheathing are good options for the construction of structural sub-floors. OSB is commonly used in constructions for floor underlayment’s, walls and roofing. Plywood, on the other hand, resists edge damage better and weighs less than OSB. It was invented by Armin Elmendorf in California in 1963. We still had frequent callbacks for squeaks. SWISS KRONO OSB/2 - board with load transfer properties, suitable for applications in dry conditions. Plywood actually gets saturated much faster than osb, but it is not prone to edge swelling and it dries out much more quickly. So finally OSB … Creating drainage channels Louisiana-Pacific’s Top Notch sub-floor panels with different coloured edge seals Louisiana … 2.0 mm/m. Each product has their merits and appropriate uses. OSB (Oriented Strand Board) Description. Floor covering (or finish floor) is the term for the topmost, eventual floor--the floor that you walk on and see. The first panel is installed at the side of the home, with the long edge flush with the corner of the building, and the bottom edge flush with the sill. 3 2)3) Squareness tolerance. Performance • As structural panels, plywood and OSB are designed to meet the … Edge seals 2. Depending on the edge finish, three types of boards can be … Oriented strand board is a multi-layer sheet formed by pressing rectangular flat chips at high pressure and temperature with exterior type resin binder. Strands used for the production of test panels were made up 50% of core layer and 50% of … Reducing Edge Thickness Swelling of OSB Sub-Floor Products 1. On the plus side, osb is a more consistent product. Thanks garyo, 31 Aug 2018 #1. Engineered to accommodate the effects of swelling due to moisture, PointSix OSB Flooring has a patented tapered-edge technology in which 0.6 mm of material is milled off at the edge. Advantages of OSB. It is an economic alternative to conventional plywood for formwork. EN 323. Quick Column Summary: OSB roof boards swelling Pull off or cover over OSB OSB can swell and still be good Question builder on delays Steve, who's having a house built in Ann Arbor, Michigan, has a questionable builder. 5 3) Allowable density tolerance in relation to the average density inside board. The T&G board owes its name to its tongue-shaped edge fitting into the groove of the adjacent panel. Ainsworth. In my current home I'm using plywood as an underlayment for new 3/4" wood floors, mainly to avoid edge swelling with standard OSB. Joined: 21 Oct 2014 Messages: 1,473 Thanks Received: 192 The grained surface of the boards leaves an attractive imprint on concrete. 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. Oriented strand board (OSB) is a type of engineered wood similar to particle board, formed by adding adhesives and then compressing layers of wood strands (flakes) in specific orientations. (1) Other sizes are available on request. OSB boards square edge Strong and sustainable EGGER OSB boards are multilayer boards with a three-layer structure of micro-veneers, so called strands, which are approved for load-bearing construction. The specifier is wise to identify … For example: 7/16-inch SHEATHING SPAN, 24/16 Exposure 1, 48 x 96 inches, square-edge, 200 pcs. Traditional OSB vs. AdvanTech Panels. When plywood gets wet, it tends to swell consistently across the sheet, and then returns to its to normal dimensions as it dries out. Floor squeaks are the result of … It is truly … Yes. Swollen edges have been known to telegraph visible ridges called "ghost lines" through asphalt roof shingles. This differential edge swelling of OSB, hereafter called edge flare, is a problem when panels are used as an underlay for floor coverings because the edges of panels protrude above the surface of the sub-floor and costly on-site sanding is required to level panels before the application of flooring [4] . Commodity OSB (left stack) starts out at 3/4-inch thick, but after soaking in water, it swells. We also had a fair amount of edge swelling — an inevitable result of rain during the framing stage before we got the house dried in. Sponsored Links; pilsbury. OSB is cheaper and has better shear strength. Edge square or tongue-and-groove Finish sanded or unsanded. Their range: OSB 2 ≥ 580 kg/m 3, OSB 3 ≥ 600 kg/m 3, OSB 4 TOP = 600-640 kg/m 3 . The densities of OSB can be found in the product data-sheets. Using pMDI resin to replace PF resin 3. Since its introduction, tens of thousands of homes have been built using Stabledge and it continues to be the panel of choice for builders who want to build … Increased levels of wax 4. The AdvanTech ® pieces (right stack) soaked in the same amount of water but remain dimensionally stable. ... Hardwood Edge … All of test panels were bonded with phenol-formaldehyde resin at (6%) with three-layer cross-aligned OSBs. This type of joint ensures easy and fast assembly and substantially … Wood scientists agree that the structural performance of plywood and OSB are equivalent. Edge swelling is common when exposed to moisture; Sometimes made from wood species with poor rot … OSB, or oriented-strand board, is an engineered wood material sold in sheets like plywood. Both are strong, durable and long-lasting. Stabledge is a premium engineered wood product ideally suited to sub-floor applications. Plywood, although not immune, is somewhat forgiving. The product standard for OSB (EN 300) does not provide any requirement value for density. "We are having a home built and OSB boards were used for […] EN 324-2. Typically, the swelling happens at the edges where the cut strands are … EN 322. od 2 do 12% od 5 do 12%. Some cracking of the finish and lifting of wood chips may also … Although OSB panels are rated "Exposure 1" for normal construction delays - which includes getting damp or wet - they can swell if the edges absorb enough water. OSB stands for oriented strand board. Astramax Screwfix Select. OSB (Oriented Strand Board) is an engineered wood-based panel consisting of strands of wood which are bonded together with a synthetic resin; the strands are pressed together in layers. The objective of this research was to optimize the dimensions of machined tapers (bevels) at the edges of oriented strand board (OSB) to reduce the differential edge swelling (edge-flare) that causes problems when OSB is exposed to water. It’s here that plywood has the edge. OSB may have a rough and variegated surface with the individual strips of around 2.5 … Machining an edge-taper, 0.6 mm-deep and 10 or 20 mm-wide eliminated edge … Will it stay that way or will it pull back in as it dries out, or is it that thickness for good now? 10,424 posts, read 46,064,922 times Reputation: 10436. Premium level PointSix Durastrand Flooring also carries a limited … c j beattie, Apr 5, 2017 #3. thickness as it dries, while OSB swelling is irreversible. will exterior caulk not do the job or what do you suggest? But of course that edge seal is lost when panels get cut on site, as they … Weyerhaeuser Hardwood Edge OSB Holds Off Moisture, Squeaks ... Issues including swelling and shrinkage of natural wood, improper acclimatization of hardwood, and insufficient drying time for damp OSB can combine to cause loosened fasteners, which in turn lead to pops and squeaks in a finished floor. 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