SUPERSEAL"s Carpet & Laminate Subfloor 324 ft² roll measures 6"7" x 50" (2m x 15m) and has an ultra thin profile of 0.11" (2.8mm). Moisture will always find a way through cracks in your home. When flooring gets damp and doesn"t have proper protection or ventilation, trapped moisture can damage your floor attracting mold and mildew. SUPERSEAL Carpet & Laminate Subfloor"s double dimple design allows both sides of the floor to breathe while protecting the underlay, carpet and engineered wood from surface and substrate moisture. Keeping moisture out significantly increases the life and condition of your flooring. You can also find SUPERSEAL Subfloor tape rolls available on Amazon for a premium moisture resistant tape for all SUPERSEAL Subfloor Installations.