Features:

• Triple layered, high performance breather membrane fabric.
• Made from high tensile spun bonded polypropylene layers, around a micro-porous polypropylene film.
• Designed for use in a fully supported or unsupported tiled, slated or metal roof system.
• The high vapour permeability and waterproof nature of the membrane, combined with excellent tensile/tear strength and high wind uplift resistance make Vent3® Light the professional’s choice as the ultimate breather membrane.
• Equally suitable whether draped unsupported over rafters or laid directly over insulation.
• The outer layer forms the functional waterproof surface, the middle layer is the breathable waterproof membrane, and the inner layer protects the membrane from abrasion and damage, also giving additional strength.
• Enables the fabric to allow moisture vapour to pass through, whilst remaining fully waterproof.

Technical data.

• Tensile strength (EN12311-1) - MD: 176N/50mm, TD: 109N/50mm
• Elongation (EN12311-1) - MD: 63%, TD: 70%
• Nail tear (EN12310-1) - MD: 92N, TD: 126N
• Hydrostatic head (BS EN 20811) - 310cm
• Water (moisture) vapour transmission (BS 3177) - 1319g/m²/24h
• Reaction to fire (EN 13501-1) - Class E
• Resistance to streaming water (MOAT69:4.2.2) - Pass
• Resistance to water penetration (EN 13859-1) - Class W1
• Water vapour resistance (BS 3177) - 0.16 MNs/g
• UV Resistance - 4 months