Leaving existing flooring in place can reduce demolition, disposal, noise, and project time, but it also introduces risk. The existing material must be securely bonded and able to support the new floor. Loose tile, cushioned flooring, damaged wood, contaminated surfaces, excessive embossing, moisture problems, and multiple existing layers may make removal necessary. Added height can affect doors, transitions, equipment, base, stairs, accessibility, and floor drains. Existing joints and movement conditions must also be evaluated. Older flooring or adhesive should be assessed for regulated materials before disturbance. Manufacturer approval and project specifications should determine whether an overlay is permitted.
Key considerations
- install commercial flooring over existing floor, flooring overlay commercial, new flooring over old tile
- flooring over existing floor, commercial renovation, substrate preparation
- installation stability, height compatibility, renovation efficiency
- reduced demolition, overlay installation, existing-surface evaluation