The Cromar Vent3 Light is a lightweight breathable roof underlay for cold and warm roof applications. It has triple layer high-performance breathable membrane which is made from two high tensile spun-bonded of polypropylene which is thermally calendared to a microporous polypropylene film. This underlay measures 50 x 1.50m (L x W). The product has UV resistance which is stable up to 3months.The Vent3 Light has full moisture vapour permeability which maintains the highest levels of water resistance. This high vapour permeability and waterproof nature of the breathable membrane is combined to give an excellent tensile and tear strength. The breathable membrane has a light grey surface which prohibits from the glare. Vent 3 Light is equally suitable for whether draped unsupported over rafters or laid directly over any insulation. The Light membrane will allow the escape of water vapour within the roof structure which prevents against the wind-driven rain, snow and dust that may penetrate the main roof waterproofing, providing a permanent quality breather underlay and will last the life of the roof construction. The product conforms to BBA and BS 553: 2003.
Features & benefits
- Waterproof membrane
- Polypropylene material which gives excellent tensile and tear strength
- Triple-layered spun-bond membrane makes it durable
- Breathable membrane has a light grey surface which prohibits from the glare
- Has full moisture vapour permeability which maintains the highest levels of water resistance