Vent3 Breathable Membranes - Breathable Roofing Felt

A BBA certified range of triple layer fabric, high performance breather membranes, made from high tensile spun bonded polypropylene layers, around a micro-porous polypropylene film. The membrane is produced with the option of an integral acrylic tape. 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 makes the Vent3 range the professional’s choice as the ultimate breather membrane. It is 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. This enables the fabric to allow moisture vapour to pass through, whilst remaining fully waterproof. The upper surface is coloured, printed with the trade name and head lap lines. Available in 1/ 1.5 m width as standard to conform easily to any typical roof configuration or the individual working practices of the installer.

Features and benefits:

• Three layer membrane.
• Custom branding available.
• Clean and easy to use.
• Lightweight and flexible.
• High tensile and tear strength.
• Waterproof membrane.
• Offers long term durability.
• UV stable (3 months exposure).
• Warm and cold roof applications.
• Meets NHBC guidance for underlays in pitched roof applications.
• BBA certified.

The range includes:

• Vent3® PRO.
• Vent3®. 
• Vent3® Classic.
• Vent3® Light.
• Vent3® Classic Xtra - Integrated tape.

Consult the technical literature for lap size details and zone (BS 5534) applications.