Choosing between shed felt and torch-on felt depends on the type of building and the required lifespan of the roof. Shed felt is a single-layer, lightweight material designed for non-habitable garden buildings like sheds and summerhouses. It is usually nailed into place and has a lifespan of 5-10 years.
When to upgrade to torch-on felt
Torch-on felt is a professional-grade, multi-layer system used for garages, extensions, and commercial properties. It is much thicker, more durable, and creates a completely seamless waterproof barrier. While more expensive and requiring professional installation, a torch-on system can last 20-30 years or more.