The Torch-On 4mm Green Mineral Felt 8m is a heavy-duty, high-performance waterproofing membrane designed for flat roofs, garages, sheds, and extensions. Measuring 8 meters in length, this professional-grade felt features a robust polyester or glass-fibre base coated with modified bitumen, engineered to provide exceptional flexibility, strength, and long-term resistance against the elements. Its 4mm thickness ensures a durable, impact-resistant barrier capable of standing up to heavy foot traffic during maintenance and severe weather conditions year-round.
 
The upper surface of the membrane is finished with a vibrant green mineral slate chipping layer, which not only gives the roof a smart, finished appearance but also serves a vital protective function. These mineral granules act as a natural shield against harmful UV rays, preventing premature aging and degradation of the bitumen underneath. Meanwhile, the underside is optimized for heat activation, melting smoothly when torched to form a completely seamless, water-tight bond with the roof deck or under-layers.
 
Ideal for both new installations and flat roof refurbishments, this torch-on felt delivers reliable, long-lasting weatherproofing that prevents moisture ingress, leaks, and pooling water. When correctly installed, it provides a secure and professional finish that protects your roof structure for years to come. Whether you are waterproofing a garden shed or a larger domestic extension, this green mineral felt offers dependable, trade-quality performance.