Incorporates both the specifications of a sub-floor and that of underlayment in a single product. The smooth, sanded surface allows for floor
3/4 x 4' x 8' Tongue and Groove Yellow Pine Plywood Underlayment
Lumber & Panels
Plywood, OSB and Panels - Close Lumber
1-1/8 in. x 4 ft. x 8 ft. T&G Sheathing Plywood 724092 - The Home Depot
Lumber & Panels
1-1/8 x 4 x 8 Sturd-I-Floor Tongue & Groove Plywood Subfloor at Menards®
Legacy LP Premium 23/32 in. Application as 4 ft. x 8 ft. Tongue and Groove OSB Sub-Floor 41499 - The Home Depot
1/4 x 4' x 8' Tempered Masonite Fiberboard S2S
Tongue and groove Plywood & Sheathing at