Flexible sheet of polypropylene strands randomly spun-bonded. UV stabilised to reduce degradation by sunlight. Resistant to passage of liquid water. Membrane is breathable, therefore will not create a condensation trap within the construction. Minimises insulation thicknesses required to achieve specified U-Values by reducing the cooling effect of rainwater build up between waterproofing and insulation.

It is supplied as part of the BauderJFRI and BauderGLAS Inverted Insulation Systems situated on top  of the inverted insulation and under the specified surfacing. 

For a comprehensive NBS J31 Specification contact Bauder technical department.