Three-layer bitumen roof underlay. Made of layer of polypropylene nonwoven, polyester nonwoven and bitumen film. The membrane is characterized by increased water-tightness parameter and extreme resistance to tearing. Product contains special stabilization additives which extend its resistance to UV radiation from 4 up to 12 months and allow to perform assembly of final roof covering with considerable delay.

Advantages:
UV resistance
Water-tightness
Tear resistance
Suitable for full sarking

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.

BITUMI - Applicationzoom
Mass ca. 450 g/m²
Vapour-permeability 0,5 g/m²/24h
Sd value ca. 50 m
UV resistance >12 months
Water-tightness W1
Roll size 1 m x 30 rm = 30 m²
Roll weight ca. 13,5 kg
Pallet 30 rolls

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