In addition to the visible surface flooring material the carpet tile or hardwood there is usually an underlayment and beneath that is a subfloor that serves as the foundation and structural reinforcement for the floor.
Osb floor decking.
The subfloor consists of sheet materials that are nailed or screwed to the joists to.
When a roofless partially built structure takes on water the plywood or osb used for floor decking can absorb water swell delaminate and require sanding or replacement before finish flooring.
A typical wood framed residential flooring system is more complicated than you think.
However plywood subfloors are stiffer than osb by about 10.
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.
23 32 cat ps2 10 tongue and groove osb subfloor application as 4 x 8.
A viable alternative to plywood this osb board is engineered to prevent any cupping warping or splitting.
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.
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