Vapour Permeable Roofing Underlay has excellent nail-tear and tensile strength while remaining lightweight and easy to cut. Used as an underlay for warm or cold roof construction, it helps to avoid the risk of roof-space condensation. 100% waterproof with unrestricted use in windy areas. UV and heat-resistant. <br> ICC-ES Certified for All Pitched Roofs <br> Silmilar to Tyvek membrane.<br> <br>
