Tongue and groove subfloor vs plywood
To avoid buckling, subfloor panels should be spaced with a 1/8-inch gap at all edges and ends to provide room for naturally occurring expansion. Tongue-and-groove edges on many premium floor panels, such as Weyerhaeuser's Edge Gold ® OSB panels, are designed to self-gap. 2. Using green joists.
Aug 16, 2013 · Plywood subfloor is going to be a nominal 3/4 inch thick and likely tongue and groove. It's also quite likely that construction adhesive was applied to the joists (reduces squeaking) if the construction is at all recent. It's a real job to remove.