The DMX Airflow underlaying membrane is perfect for any type of flooring. Made of closed-cell waterproof foam on both sides, it allows airflow under your floors which eliminates moisture that causes mold. This patented product offers superior soundproofing and insulates your floors from the cold with the vapor tape that insures a complete sealing. The membrane is rated R-1 and has a compressive strength of 8,250 lb/sq.ft. (56 PSI). This product is backed by a 50-year warranty.