Tyvek Supro is a durable, water resistant membrane that is reinforced with a laminated polypropylene nonwoven. This airtight, vapour-permeable membrane is extremely water-resistant, and can be used for all supported and unsupported pitched roofs. Please note the maximum single cut length is 50m x 1m wide.Tyvek Supro does not need any soffit, tile or ridge ventilation, which can save time and money in the construction process. In addition to warm, hybrid and cold roofs, applications include Scottish sarking board systems, low-pitched metal roofs, and wall and floor applications. Tyvek Supro water resistant membrane products are designed to withstand prolonged UV radiation and high temperatures, and come with full BBA and IAB approval for use in all pitched roof constructions. Properties Length: up to 50m. Width: 1m. Roll size: Cut to size - up to 50m2. Roll weight: up to 8kg. Mass per unit area: 145 gsm. UV exposure: 4 months. Water vapour transmission: 0.015. Product thickness: 450 m. Composition: composite of high density polyethylene and polypropylene. Features Extremely water-resistant. Airtight. Vapour-permeable. Offers superior air and moisture management for commercial and residential buildings. Durable resistance to prolonged UV radiation and high temperatures. For all supported and unsupported pitched roof applications - warm, hybrid and cold roofs. For scottish sarking board systems. For low pitched metal roofs, wall and floor applications. Fully BBA, IAB, and UKAS approved.