what is better osb or plywood for roof decking
edit Cost of Plywood vs OSB. OSB is cheaper than plywood by about $3 to $5 per panel. For a typical 2,400 sq. ft. home, OSB is about $700 less expensive compared with plywood if used as the subfloor, sheathing, and roof decking.Both plywood and OSB are used for sheathing roofs, walls and subfloors.hile OSB (Oriented Strand Board) is generally cheaper than plywood, it is heavier and not as stiff as plywood and can result in soft squeaky floors under weight.