IZOFOL Silver D65 vapour-permeable membrane is used in sloping roof structures. IZOFOL Silver D65 protects the roof structure from water leakage and shields the thermal insulation from external dampness. IZOFOL Silver D65 also provides protection against heat bleeding from the roof insulation layer. IZOFOL Silver D65 vapour-permeable membrane is a 2-layer product with very good resistance to tearing, due to the fact that one of the layers is a strong polypropylene fabric.