Universal Felt-Torch-on SBS Underlay Film / Sand - 16m x 1m

Universal Felt-Torch-on SBS Underlay Film / Sand – 16m x 1m

The Universal Felt-Torch-on SBS Underlay is a robust, high-performance roofing membrane engineered for long-lasting protection. With an impressive life expectancy of up to 20 years, this dependable underlay is designed to deliver exceptional results on flat, pitched and curved roofs. Whether you’re a roofing professional or a DIY homeowner, this membrane offers outstanding reliability, flexibility and ease of installation. Manufactured using polyester-reinforced SBS modified bitumen, the membrane combines strength with elasticity. SBS (Styrene-Butadiene-Styrene) modification significantly improves cold flexibility and allows the material to stretch and return to shape without cracking — a key characteristic for roofs exposed to temperature changes and building movement.

Durability & Performance

One of the standout features of this product is its superior bond strength with film selvedge, ensuring a secure, long-lasting installation. Its exceptional dimensional stability means the underlay can accommodate natural building movement without compromising performance. The membrane offers excellent resistance to pests, mould, algae, fungi, moss and bacteria, helping to keep your roof structure healthier for longer. It also provides strong protection against water ingress as well as freeze-thaw cycles, ensuring dependable weatherproofing throughout the year.

Engineered for Tough Conditions

Thanks to its high mechanical strength, this SBS underlay provides impressive resistance to punctures and general wear — making it more durable than many traditional flat-roof coverings. It also incorporates advanced grooved adhesion technology, which means less heat is required during application. This not only makes installation faster and safer but also reduces overall labour time. Every roll arrives securely packaged in a reinforced heat-shrink bag, ensuring the product reaches you in perfect condition and ready to install.

Key Features

Polyester-reinforced SBS modified bitumen 20-year life expectancy Roll size: 16m x 1m Easy to handle and install Solar-reflective, self-finished mineral surface

FAQs

What types of roofs is this underlay suitable for?

This SBS Torch-on Underlay is ideal for flat, pitched and curved roofs, making it versatile enough for both residential and commercial applications.

Does the underlay require special tools or high heat for installation?

No. Thanks to its grooved adhesion technology, it requires less heat than traditional torch-on products, simplifying installation and saving time.

How long can I expect this membrane to last once installed?

The underlay has a life expectancy of up to 20 years, and when installed by an approved contractor under the manufacturer’s guidelines, it can qualify for additional guarantee coverage.