BIBS HP combines our innovative closed-cell polyurethane foam, our proven fiber glass insulation and the Blow-In-Blanket System® (BIBS). A layer of at least 1/2" closed-cell spray polyurethane foam is first applied to the substrate, followed by the application of proprietary BIBS mesh. Fiber glass insulation is then blow-in to the remaining cavity space. Depending on climate, a vapor retarder may be necessary. BIBS HP offers an air isolation barrier and superior thermal and acoustical performance. This unique insulation solution helps make a home more energy efficient, quiet and comfortable.