Insulation Solutions' INSUL-TARP under-slab insulation for radiant floor heating systems combines a lightweight, closed cell foam and aluminum reflective material with a protective poly coating within three thin layers. The durable poly coating protects the insulating material from potentially damaging surfaces and is impermeable to moisture, helping it to maintain a high R-value in a minimal amount of space. INSUL-TARP controls all three modes of heat transfer--conduction, convection and radiation--reflecting up to 97% of the radiant heat transfer back into the living areas. It comes in four sizes: 6' x 25', 6' x 50', 12' x 25' and 12' x 50'.Insulation Solutions, Inc.