Warm Roof Breather Membrane

Non breathable membrane can often be confused with a vapour control layer but shouldn t be.

Warm roof breather membrane.

Typically they are used within external wall and roof constructions where the external cladding may not be completely water tight or moisture resistant such as in tiled roofs or framed wall constructions. Roofshield provides a secondary barrier to the ingress of rain wind and snow. A roofing expert points out the important details when installing roofing membranes in warm roofs. Roofshield is a unique three layer nonwoven spunbonded polypropylene breather membrane with a patented melt blown core.

Breathex is the first modern underlayment which makes no sacrifices bringing with it all the benefits of tradition but made of truly cutting edge synthetic construction. Breather membranes or breathable membranes are water resistant but vapour permeable. It is intended for use as a pitched roof underlay breathable roofing felt and is fixed beneath tiles and slates. Warm roofs or roofs without adequate ventilation require breather membrane although again the breather membrane should not strictly be used in isolation in accordance with bs5250.

While most other underlayments do not breathe breathex does allowing water vapour to escape from a roof deck. Breathex is the next step in the evolution of roof protection.