Delta-FL subfloor barrier system keeps out moisture and raises floor temperatures by up to 30%. Roll-out design simplifies installation and leveling. Thickness is less than 1/2 in. Laminate can be placed directly on top of the system. Supports up to 5200 lbs./sq. ft. Comes with 20-year warranty. Cosella-Dörken Products Inc. 888-433-5724.