synthetic roofing felt manufacturer ASTM standard waterproof membrane use under shingles,tile,metal or slate

"? Made by two layers of non-woven fabrics and one layer of microporous polymeric membrane in the middle. The three layers are thermally laminated without using any chemicals such as glues.Outer layer forms functional waterproof surface Middle layer breathable waterproof membrane Inner layer protects from abrasion and damage, also giving additional strength

Breathable Membranes allow insulated structures to easily release excess moisture vapour into the atmosphere and so keep the internal components of wall and roof structures dry, whilst performing the task of a secondary protection membrane and preventing penetration by external environmental impurities such as dirt and rain. These types of membrane are installed on the cold side, or the external side of the insulation beneath the main outer building lining, roof-tiles or cladding.

The trouble with exterior house paint or building felts/papers is that degrades over time, allowing water to ingress into your home. So every few years the whole process has to be repeated to protect your property.

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