Per the federal regulations contained in 49 CFR Part 26, Electronic Code of Federal regulations, a DBE is a for-profit small business concern that is: 1  At least 51 percent owned by one or more individuals who are both socially and economically disadvantaged.
Use a piece of lumber as a smash block to protect the plywood tongue. Smash the additional pieces of plywood in place. Installing Plywood Subfloor: Leveling and Finishing
Print. Share: Tiling over an old, solid wood subfloor is dicey, even with a layer of backer board. Avoid tile and grout cracks in the finished floor with proper preparation and lots and lots of screws.ooden subfloors in older houses need to be strengthened and stabilized before backer board and tile are installed. The best method is to refasten the subfloor, then add a layer of plywood.