Protect A1 T3 provides a secondary line of defence against wind driven rain and snow and resistance to wind uplift. Being entirely waterproof it can be used as a temporary roof covering during the period the roof covering is applied. Protect A1 T3 is a high performance impermeable heavy-duty type HR roofing underlay, developed to overcome the disadvantages of traditional Type 1F and 5U felts and second generation plastic sheet materials. It has an ultra tough 4 ply construction with heavy-duty non-slip reinforcing grid on the upper surface for maximum damage resistance. Please note this product does not require the joints & laps to be taped but must be battened correctly. Properties Length: 30m. Width: 1.5m. Roll size: 45m2. Roll weight: 7.95kg. Weight: 170gsm. Brand: Protect. Features Completely waterproof. Can be used as a temporary roof covering. Excellent nail tear strength and tensile strength. Has unrestricted use for wind uplift in all exposure conditions in the UK and Ireland. Suitable for use in zones 1-5 at 345mm batten gauge. UV and heat stable. Absorbent undersurface prevents condensate drip-off. Embossed dark grey upper surface reduces glare and takes a chalk line marking. Does not generate noise under wind gusting. Easy to cut, clean, light to handle and unaffected by temperature changes.