A subfloor is a layer of flooring that is built directly on the floor beams or joists. This is typically made of plywood, though concrete is also an option, as well as composite materials. Thetile flooringis installed on top of the subfloor. Why is a Subfloor Necessary? The purpose of...
Third, where one piece of plywood meets another, a seam will be created. You will need to install another 2×4 between the joists so you can glue and nail the plywood, without the 2×4 there will be nothing to anchor the new sub-flooring to which can lead to the new floor shifting ...