Four-layer synthetic roof underlay designed for application with bitumen and wooden shingles as well as slate. The membrane is characterized by increased water-tightness parameter and extreme resistance to tearing. Product contains special stabilization additives which assure an excellent UV resistance and allow to perform assembly of final roof covering with considerable delay.
Underlay is designed for use as initial covering for ventilated sloping roofs with full sarking. Strongly recommended for application with bitumen and wooden shingles as well as slate. Venting slot between the membrane and the thermal insulation (mineral wool, fiberglass) must be preserved. The product must not be applied directly on thermal insulation. The final roof covering may be assembled without batten and counter-batten.