You do know they have "Wolmenized or pressure treated plywood", if these are not to your liking, you can use a polyurethane but the edges will be your problem areas, the edges have to be completely sealed, (to do this is time consuming) I wouldn't use a deck sealer, this could delaminate the plywood. If the project is indoors, but in a damp or humid area, you can apply a "Vinyl sealer", 2 coats, and then apply a "Pre-cat Lacquer, 2 to 3 coats. Both these products are available for about $28.00 a gallon, AT: * http://www.hoodfinishing.com/
You cannot do that. The is NO WAY you can do that.
yes it is because if it can be used for floorings then shorly it can resist a bit of water
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How much? what kind of plywood floor? Why do you need to do this??
OSB stands for oriented strand board. It is made of wood strands and waterproof adhesives. The strength of OSB board is equal to that of plywood.
The general practice, is to leave the underside of plywood decking bare, as this allows the wood to breathe, and be able to dry out. When using treated, or marine grade plywood, only one side, usually the top side, is sealed.
17.15
I would use the sturdiest and longest I could find and cover them with waterproof plywood.
You will need 12.5 sheets of 4x8 plywood.
No, it is treated and manufactured under much higher pressure, free of voids, and will cost even more than exterior plywood, which is costlier than "regular" plywood.Marine plywood is good enough for boat building . But regular plywood can only be used for furniture , decoration .
345.00
Exterior grade plywood is not waterproof and is not meant to be used as a base for tile in exterior applications. Exterior tile needs to have a cementious type base which will not swell or deteriorate when wet.