Grafter Integrate 100 Breather Membrane Roofing Felt (1m x 20m) - 2 Pack

• 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), suitable for warm, cold, and hybrid pitched roof applications

Easy-Trim Grafter Integrate 100 Breather Membrane (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. Technical Information Material: 3-Layer Polypropylene Sheet (Spun Bonded Polypropylene Layer, Microporous Polypropylene Film) Integrated Tape: 45mm (60mm offset) [Face] | 90mm (15mm offset) [Reverse] Adhesive Type: Enhanced Acrylic Mass: 100gsm Width: 1m (3ft 3in) Length: 20m (65ft 7in) Maximum tensile force MD / CMD (N/50mm): 220 / 140 Elongation MD / CMD (%): 40 / 70 Resistance to Tearing MD / CMD (N): 80 / 90 Resistance to penetration of air (m3/m2.h.100Pa): <0.02 Fire Class: E Water Resistance Class: W1 Compatibility: Suitable for both fully supported and unsupported installations in warm, cold and hybrid tiled or slate pitched roofs. Certification: BBA 10/4753, BS5534:2014 Annex A, Type LR Underlay to BS5250, CE