Grafter Integrate 100 Breather Membrane Roofing Felt from Easy-Trim (100gsm, 1m x 20m) Tape-integrated roofing underlay for quicker, secure lap sealing Lightweight 100gsm vapour permeable membrane with dual integrated acrylic tapes for quick, consistent watertight lap sealing. Precisely positioned—45mm tape on the printed face and 90mm on the reverse—these strips align accurately at overlaps, removing the need for separate double-sided tape. Delivers faster installation and cleaner, more reliable sealed laps, supporting compliance with BS5534 wind uplift requirements including Zones 1–5 with battened laps. A 3-layer microporous construction delivers a vapour permeable, air-resistant underlay with W1 water resistance, strong tensile tear strength, and 3-month UV stability. Suitable for use in tiled or slate pitched roofs and wall applications—including supported and unsupported installations—it performs across warm, cold, and hybrid roof designs. Acts as a dependable secondary barrier against wind-driven rain while maintaining a breathable roof structure. Features & Benefits Dual integrated tapes – Pre-applied 45mm face and 90mm reverse strips for fast, accurate lap sealing BS5534 wind uplift design – Suitable for Zones 1–5 with battened and taped laps for compliant pitched roof applications Advanced 3-layer build – 100gsm microporous construction for a lightweight yet strong, tear-resistant membrane High vapour permeability – Helps reduce condensation risk and protect roof timbers and insulation W1 water resistance – Provides a high-performance secondary barrier against wind-driven rain Air-resistant performance – EN 12114 tested for reduced air leakage through the roof build-up UV stable – 3-month weather protection during construction exposure periods BBA certified – Conforms to BS5534:2014 Annex A and BS5250 (Type LR underlay) National Wind Zone Suitability New builds must comply with British Standard for Tiling and Roofing (BS5534) Annex A, with breather membranes tested against wind uplift, and their suitability for use across the 5 national wind zones.
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