I built a 12'x20' shed foundation on the Oregon coast last Summer. Is it OK for OSB3 boarding to get wet now and then during the construction of a building? ... No exposed plywood face or edge can survive immersion or exposure to water unprotected. Inner plywood of roof wet. . The plywood was very wet when purchased and installed wet like most PT woods. This is not a decay issue, but swelling can cause other difficulties in construction. Joists down, plywood down, walls erected. I plan on erecting walls when I return in the Spring. No ceiling leaks.. 2 layers of shingles. - Answered by a verified Home Improvement Expert We use cookies to give you the best possible experience on our website. Many types of lumbered materials take on water damage if they are not covered with a tarp during heavy rainstorms. Best way to check - see if it dries out during dry periods and get wet again onunderside of the sheathing in rains. A. Shingle roofs are installed every day over wood decking that has been wet by rain. As for the glue bond, it weakens when the wood stays wet for a prolonged period, and the layers can separate eventually. No mold yet. Be sure to put a heavy weight on top of the tarp so that it does not blow off during the storm. Ply is an engineered wood product made from three or … Please see "Proper Handling" below for tips on preventing swelling. When exposed to moisture, the wooden layers can swell or deform. Roof problems may have started with wet plywood Originally published April 28, 2012 at 5:00 am Updated April 28, 2012 at 7:01 am Home Fix: Dwight Barnett answers home … ... (who is also our builder) thought that it likely had something to do with water absorbption during the wet season...when the framing dried, it contracted, squishing the nails out, etc. Generally, plywood roof decking that has gotten wet and had … Today, builders can choose from several types of exterior plywood. I still plan on installing a lino or laminate floor over the plywood once finished. Does 3/4" tongue and grove CDX plywood get damaged from rain water when the home is under construction. Besides delaminating, plywood exposed to moisture also grows molds. It is 3/4" pressure-treated Doug Fir plywood over P-T framing. How to Protect Plywood From Water Damage. Plywood is one of the most commonly used construction materials in the residential and commercial areas. ... is oer about 25-30 years old. In the UK it rains, as you know. a lot. Plywood is made up of thin layers of laminated softwood, held together by strong, adhesive glue. Cover your plywood and elevate it off the ground during the construction process. Exterior plywood came on the scene in 1934 with the development of a waterproof adhesive. Plywood as a building material is very widely used due to its many useful properties. Not in standard platform construction. Building Construction; ... Birch plywood is a suitable alternative in wet area applications. Replace? OSB's other moisture challenge has to do with dimensional stability - in other words, OSB can irreversibly swell, especially at the edges, when it gets too wet. It is an economical, factory-produced sheet of wood with precise dimensions that does not warp or crack with changes in atmospheric moisture. Contemporary plywood was first patented in the mid-1800s, and production began in earnest in Portland, Oregon, in 1905. Widely used due to its many useful properties see `` Proper Handling '' below for tips on preventing.! Our website of exterior plywood came on the can plywood get wet during construction in 1934 with the development of a waterproof.. Mid-1800S, and production began in earnest in Portland, Oregon, 1905... Crack with changes in atmospheric moisture choose from several types of lumbered can plywood get wet during construction take water... 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