Laydex Breathe-X Breathable Roof Membrane Grey 1.5m x 50m is a 100g watertight and vapour-permeable flexible membrane. It is intended for use as an underlay on both unsupported and supported pitched roofs, conforming to the Irish Code of Practice ICP 2:2002. This NSAI certified membrane provides a reliable 0.5mm thickness to ensure long-term protection for the roof structure.