This is not a cheap double bubble reflective insulation material, we provide high-quality reflective insulation materials, radiation barriers, and commercial grade!!! Where is the insulation located? Penthouse, ceiling, walls, steel structure buildings, pole type barns, roofs, concrete floors, radiant heat in concrete floors, radiant heating under wooden floors, cathedral ceilings, water heater tanks, radon barriers, water pipes and ducts, reflective ceiling systems, behind hot water diffusers, crawling spaces, above ground swimming pools, sheds, fish and hunting sheds, cooling rooms, cold storage rooms or wine cellars, concrete block walls, Hollow walls with metal studs, foundation walls, and above ground swimming pools in commercial buildings.