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
Installing ceramic tile and porcelain tile over a plywood subfloor. 1  A plywood subfloor must be structurally sound and able to support the installation. 2  Tile floors are heavy and tile is a hard material. 3  It will break or dislodge if the surface bends under the load. 4  Remember that you need a very flat surface to work on.