Single Bubble Reflective Insulation (White/Foil) 4'x125' - 500 sq ftEcoFoil Single Bubble Foil Insulation offers efficient radiant heat reflection and moisture resistance for buildings in moderate climates. Designed for structures like pole barns, metal buildings, basements, crawl spaces, and storage units, this insulation features a polyethylene bubble layer that forms a built in thermal break. The reflective surface helps stabilize interior temperatures while the bubble cushioning minimizes condensation when hot and