9mm plywood underlayment is specifically designed for use under ceramic tile floors when 3/8 inch plywood is an approved underlayment. The 7 ply construction makes the panel stronger, harder and more deflection resistant than typical 3-ply 3/8 inch softwood plywood panels. The exterior grade phenolic glue provides the extra water resistance required for use under ceramic tiles in non-immersion applications.
Powerhold offers high-quality and high value installation products for all types of flooring projects from underlayment to surface protection to adhesives.