Facade membranes protect the walls of buildings from uncontrolled ventilation and dampness , while venting water vapour. It means that thermal insulation does not become excessively damp and therefore it does not lose its insulation parameters, and the wooden wall structure is not exposed to fungal or mould growth. As a result, they increase the energy efficiency of the building: they minimize heat loss and reduce heating costs. Corotop® facade membranes are resistant to longitudinal and transverse tearing,, and with the right dose of UV stabilizers, , they are also resistant to the sun.

Corotop® Open i CoroVin® are the most commonly selected facade membranes by roofers and investors.