Cromar Vent 3 Classic 115g Breathable Underlay 50 x 1m

Vent 3® Classic is a breathable roof underlay that gives major benefits over traditional underlays.

The Cromar breather felt is made from two, high-tensile, spun-bonded polypropylene layers. This triple layer, high performance, breathable membrane is thermally calendared to a micro-porous polypropylene film.

• Layer one - waterproof surface
• Layer two - breathable waterproof membrane
• Layer three - protection from abrasion and damage, giving additional strength

This product has exactly the same specifications as the Vent 3 Light breathable membrane, but the Classic has a heavier GSM at 115, compared to this Light's 95 GSM.

Benefits

• Clean and easy to use
• Lightweight and flexible
• Waterproof membrane
• High vapour permeability
• Long-term durability and tensile/tear strength
• High wind uplift resistance
• BS 5534:2014 compliant