Bystrotorch SBS Torch on Flat Roofing Felt Underlay

Product Code 49263
£42.11
Incl. VAT £50.53

Est. delivery: 1-2 Working Days

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  • BBA Approved
  • SBS Torch on Underlay
  • 16m x 1m roll
  • 10 year guarantee
  • Ideal for flat roofing

SBS (Styrene Butadiene Styrene) refers to a family of synthetic rubber that is derived from styrene and butadiene. It is a thermoplastic elastomer which makes it the perfect bitumen modifier to achieve elastic properties and cold flexibility due to its aging stability when blended with bitumen, and excellent abrasion resistance. The material will retain its shape after it has been stretched which makes it a popular choice for coating, sealants, bitumen roofing, paving, and a number of other applications.

Suitable for all flat roofing applications, it can also be used to waterproof car park decks, bridge decks, and green roofs. It is resistant to even the worst weather conditions including extreme high and low temperatures, rain, snow, and ice. The life expectancy of an SBS roofing system is excellent and it’s guaranteed to retain its elasticity throughout the years.

The SBS bitumen blends together with reinforcement in order to accommodate building movement and ensure high performance. Installation is simply heat applied with a gas torch. SBS is the most suitable flat roof covering due to its high resistance to punctures and other types of mechanical damage when compared to alternative materials making it an increasingly popular choice for building owners all over the world.

As a building owner, you can sit back and relax knowing that maximum security is achieved by the instalment of this robust multi-layered system. Normally when an SBS flat roof system reaches the end of its service life, you can install a single layer overlay on top of the existing one in order to extend and renew its longevity.

The Bystrotorch SBS Torch On Roofing Felt Underlay is to be used in conjunction with the Bystrotorch Roofing Felt. The roll is 16 meters long, 1 meter wide, and weighs 38 kilograms. Each product comes with a 10 year manufacturer’s guarantee for your peace of mind.

FREE DELIVERY on Roof Windows and Accessories on orders over £50 (Exclusions apply)

All other Delivery Charges are based on weight and location, please add products to your basket to calculate shipping.

A small amount of product lines from particular manufacturers listed below will incur a supplier delivery surcharge.


Next Day Delivery available on orders of stocked items if placed before 2pm

Deliveries will be made between 8am and 6pm. Delivery times apply to weekdays only.


Delivery of Windows to England, Wales, and the majority of Scotland:
Basket Value Price (£)
0-£50 £9.95
Over £50 Free Delivery

Delivery of Windows to the Channel Islands, Scottish Highlands, Northern Ireland, Isle of Man

(postcodes IV, HS, KA27-28, KW, PA20-49, PA60-78, PH17-26, PH30-44, PH49-50, ZE, AB)

Basket Value Price (£)
0-£249 £20
Over £250 £50

It is with regret that we cannot offer a service to these areas for orders over 126kg but please call us on and we will attempt to organise a delivery to your custom if required.


Supplier Delivery Charges

Please note the following supplier delivery surcharges:

Ariel Plastics = £25.00

Britmet Tileform= £35.00

Lead Products(orders under 250kg) = £50.00

Marley Eternit roof tiles (orders under a pallet) = £75.00

Marley Eternit sheeting (exclusions apply) = £50.00

Redland = £100.00

Palram = £25.00

Please phone us on if you are unsure.