The PHS 140 Breather Membrane is a triple layer fabric, high performance breather membrane, made from high tensile spun bonded polypropylene layers, around a micro-porous polypropylene film. It is designed, manufactured and quality assured for use in a fully supported or unsupported tile, slate of metal roof systems. The high vapour permeability and waterproof nature of the membrane, combined with excellent tensile/tear strength and high wind uplift resistance, makes PHS 140 Breather Membrane the professional’s choice as the ultimate breather membrane. The outer layer (printed 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 green and printed with our trade name and overlap lines.