Osb Or Plywood For Attic Floor

Install two by four blocking between joists or wherever needed to support edges of the plywood that do not have support from the bottom.

Osb or plywood for attic floor.

Maneuvering heavy 4 x 8 sheets of plywood or osb oriented strand board up to an unfinished attic is sometimes like trying to fit a square peg into a round hole. Osb is not attractive enough to serve as a floor covering not only is the chip board appearance unattractive but the surface is also often marked with grid lines and manufacturer markings. In 2001 oriented strand board surpassed plywood in terms of square footage produced. Cut the plywood into manageable strips about 10 inches wide to make the job easier.

For joists spaced. Platforms don t have to be plywood. 7 16 and 6 00 sounds more like osb than plywood. Osb is now used for about 70 percent of all floor wall and roof sheathing in north america.

It is too thin for a floor in a room but for a lightly used attic it is plenty. Attic pine oriented strand board common. I ve used 7 16 osb for decking in an attic. What size plywood for an attic floor.

Building codes the engineered wood association architects and most builders rate plywood and oriented strand board obs sheathing equal in strength and durability. Here are a few tips to help you and your house get through the attic flooring installation job unscathed. Osb oriented strand board. However plywood subfloors are stiffer than osb by about 10.

The decision regarding the thickness of plywood to use for the subfloor in the attic has a lot to do with how you intend to use the attic and it also. You can install inch plywood or oriented strand board osb in 4 foot by 8 foot panels over existing 16 inch oc joists. Osb is cheaper than plywood by about 3 to 5 per panel. Osb when exposed to the weather will eventually swell and bubble up minor instances of bubbling can be sanded but for the most part the osb is irreparable and should be replaced.

A plywood subfloor generally uses 1 2 inch to 3 4 inch thick sheets of plywood that have one rough side which faces down and one smooth side which faces up. The sheets are generally 4 x 8 or 4 x 12 feet in size. Plywood comes in large sheets. X 47 75 in install over insulation or unreliable attic flooring boards lock together using a tongue and groove design.

It might seem impossible to haul it up to the attic.