SuperFOIL SFBB Reflective Breather Membrane Felt Underlay is a high-performance solution for roofing and wall applications, designed to improve thermal efficiency while providing robust weather protection. This 25m x 1.5m membrane is vapour-permeable, allowing moisture to escape while preventing water ingress, making it ideal for new builds and renovations. Its reflective surface helps enhance insulation by reflecting radiant heat, supporting energy efficiency in your property. SuperFOIL SFBB is lightweight, easy to install, and suitable for use with various roof types, offering reliable durability and performance as a breather membrane underlay.