All surfaces must be clean and free of dust, dirt, oil or other contaminants.
Wooden Floors (Interior Only)
Total wood thickness should be at least 1" and top layer of wood must be an exterior grade fir plywood. The wood floor must be solid with NO "give" to it. The top layer of plywood should be nailed with 1½" wood / dark screws on 6" centers and at 3" intervals around the perimeter of sheets. Leave a gap of approximately 1/8" between sheets of plywood in the top layer to allow for possible expansion. Fibre rock underlayment may be substituted for fir plywood.
Concrete
Must have cured for at least 28 days. Painted surfaces should be sanded with coarse sandpaper or etched with muriatic acid and vacuumed.
Resilient Flooring
Remove any resilient flooring with a "cushion" layer. Screw ¼" plywood underlayment over resilient floors installed over a wood sub-floor (see wooden floors above). Remove resilient floors installed over concrete. Call for instructions for removal of vinyl surface.