When you look at a finished roof, it’s easy to forget that the tiles are only part of the story. The composition of every well-built roof begins with a layer of roofing membrane (also referred to as roofing felt), this underlay acts as a protective layer against wind-driven rain, dust, and moisture, providing additional security to your roof.
A roofing underlay is the first key part of a new roof installation, fitted onto the roof structure before then battening and tiling. Modern breathable roofing membranes allow water vapour from inside the building to escape, preventing condensation as part of a ventilated roof system. This balance is crucial for keeping roof spaces dry and protecting insulation and timber over the long term.
Without a breathable roofing underlay, moisture can become trapped inside the roof, which may lead to damp issues, reduced insulation performance, or even structural damage. That’s why breathable membranes are now considered best practice in modern roofing, especially when used alongside proper eaves and ridge ventilation.
Metrotile supplies Vapr Free Xtra breathable roofing membrane, designed to work seamlessly with our lightweight metal roofing systems. It’s available in two practical roll sizes:
A breathable roof membrane is the base layer of a Metrotile roof system, all backed by our 40-year weatherproof guarantee, providing reliable weather security, excellent breathability, and easy installation; helping ensure your roof performs as a complete, long-lasting system from the inside out.
