For proper installation, the subfloor or old flooring surface must be flat, simple, and clean. Laminate floor coverings can usually be installed efficiently right over old floor coverings, such as sheet vinyl fabric, provided the top is even and smooth rather than delicate or cushiony{…}
Floor coverings manufacturers always recommend placing down underlayment before laying the laminate. This skinny, dense foam level really helps to absorb reasonable, offers a thermal hurdle, makes it much easier to walk on the laminate, and helps the floor coverings bridge minimal gaps and bumps in the root floor{…}