I'm replacing a damaged bathroom subfloor in a 1965 Northern California home. The subflooring is tongue and groove 2x4s. I'd like to replace it with the same but I can't seem to find it anywhere. Any suggestions on where I can get these or should I just layer plywood? Thanks!
2x4 T&G decking is probably going to be tough to find. Really good lumber yards will often carry 2x6 T&G though. If you find it, it will usually have a chamfered edge (for looks in ceiling applications). If you're not going to see it, I'd suggest furring up the joists with 1x2's or strips of plywood, and finishing off with a layer of 3/4" plywood. Or just use two layers of 3/4".