Single Bubble Insulation - Foil/Foil - 6' x 125' (750 sq ft)EcoFoil Single Bubble Foil Insulation is designed for moderate climate buildings that need reliable radiant heat control and moisture protection. Commonly used in pole barns, metal buildings, basement walls, crawl spaces, and storage areas, this insulation features a single polyethylene bubble layer that forms a built in air gap. This reduces direct heat transfer and helps prevent frost and condensation when warm and cold surfaces meet. At just 1 8"