A1 T3 Heavy Duty Felt HR Roof Underlay by Protect - 30m x 1.5m Roll | Roofing Superstore®
Roof repair - can I use torch-on felt nailed only, as underlay (instead of 1f)? - Roofing, Tiling & Slating - BuildHub.org.uk
Klober - An alternative to 1F felt, Sepa Light is Klober's non-breathable roof underlay for traditional ventilation, suitable for ventilated pitched roofs.. ✓ Strong and lightweight alternative to traditional 1F felt ✓
Multi TX Non Breather Roofing Membrane (110g/m2) 45m x 1m Roll (Pallet of 30) | Roofing Superstore®