Vapour Permeable Underlays

Permavent delivers a high-performance range of roofing underlays for pitched roof applications. Our extensive range includes air-permeable, vapour permeable and impermeable underlays, providing solutions for a wide range of roof designs, pitches and specification requirements. Engineered to regulate air and vapour movement, our underlays help control interstitial condensation risk while providing a reliable secondary barrier to wind-driven rain, protecting the roof structure and maintaining a healthy roof. Independently certified by the British Board of Agrément (BBA), CE and UKCA marked, and rigorously tested by the Building Research Establishment (BRE), our roofing underlays deliver proven compliance and performance. A superior range, engineered to suit all pitched roof types.