The first job at hand is to prepare existing rooms for new flooring. The amount of preparation needed depends on the old flooring and the new. Preparation means making sure the floor surface is firm and without defect that can reduce the new flooring’s functionality or life. For example, if you’re installing ceramic tile you want to make sure that the subfloor will support the added weight. In addition, the surface must be firm enough to support traffic without cracking the tile or grout. Preparing for carpeting is relatively easy because padding and the carpet will absorb many imperfections in the subfloor. Installing laminate wood over vinyl tile, however, requires more preparation.