£57.99
In stock
9925 in stock
Build a strong and dependable flat roofing system with SupaTec SBS Torch-On Film Underlay, a professional-quality 3mm SBS modified bitumen roofing underlay designed for use beneath a compatible roofing cap sheet.
Supplied in a substantial 12m x 1m roll weighing approximately 42kg, SupaTec Film Underlay is suitable for new flat roofs, refurbishment projects and replacement felt roofing systems where a durable waterproof underlay is required.
The membrane can be installed using either the torch-on method or a suitable cold felt adhesive, providing flexibility to suit different roofing applications.
SupaTec is manufactured using SBS modified bitumen, providing a durable and flexible roofing membrane suitable for use as the underlay layer within a built-up felt roofing system.
The underlay forms an important part of the overall waterproofing system, providing a secure base beneath the final mineral cap sheet.
For customers looking for torch-on felt underlay, SBS roofing underlay or 3mm torch-on roofing felt, SupaTec provides a practical professional-grade solution.
This product is specifically designed to be used as an underlay rather than the exposed finishing layer of the roof.
The SupaTec Film Underlay is installed beneath a compatible mineral cap sheet to help form a complete built-up waterproof roofing system.
A suitable cap sheet provides the exposed weather-resistant finish, while the underlay creates an additional waterproof layer beneath.
SupaTec SBS Film Underlay is ideal for a range of roofing projects, including:
SBS (Styrene-Butadiene-Styrene) modified bitumen is commonly used in high-performance felt roofing membranes where durability and flexibility are important.
The modified bitumen construction makes SupaTec a strong choice for professional roofing installations and refurbishment projects requiring a reliable waterproof underlay.
For customers comparing SBS torch-on felt, bitumen roofing underlay and traditional roofing felt systems, this product offers a substantial 3mm membrane designed specifically for built-up roof applications.
At approximately 3mm thick and 42kg per roll, SupaTec is a substantial roofing membrane designed for professional flat roof installations.
The generous thickness makes it ideal for customers requiring a heavy duty torch-on underlay to form part of a durable multi-layer roofing system.
Each roll measures 12 metres long by 1 metre wide, providing approximately 12m² of material before allowing for overlaps.
SupaTec Film Underlay is suitable for installation using the traditional torch-on roofing method.
During torch application, heat is carefully applied to the membrane to activate the bitumen and bond the roofing felt securely to the prepared substrate or underlying roofing layer.
Torch-on roofing can create a strong and secure waterproof bond when installed correctly by an experienced person.
Important: Torch-on installation involves an open flame and should only be carried out by suitably trained and competent installers using the correct equipment and fire-safety procedures.
Where flame application is unsuitable, SupaTec Film Underlay may also be installed using a compatible cold felt roofing adhesive, subject to the adhesive manufacturer’s instructions and the requirements of the roofing system.
This provides additional installation flexibility for projects where torch application cannot or should not be used.
The SupaTec underlay features a plastic film finish to both the top and bottom surfaces.
Unlike some roofing membranes, this product does not need to be rolled out and left to settle prior to use, helping make preparation more straightforward when installing the roofing system.
For many flat roofing projects, SupaTec Film Underlay can be combined with a compatible SBS mineral cap sheet to create a complete built-up felt roofing system.
A typical system consists of:
The mineral cap sheet provides the exposed finished surface while the film underlay provides an additional waterproofing layer underneath.
Using compatible products together helps create a more robust roofing system than relying on a single layer of felt alone.
Whether you’re constructing a new flat roof or replacing an existing felt roofing system, SupaTec offers a practical underlay solution for both new-build and refurbishment roofing projects.
Its 12m roll length also provides useful coverage for garages, extensions, workshops and other medium-to-large flat roof areas.
Choose SupaTec SBS Torch-On Film Underlay 12m x 1m – 3mm – 42kg for a strong and dependable roofing underlay designed to form part of a professional built-up flat roofing system.
Thank you for visiting and shopping at www.feltproducts.co.uk. Following are the terms and conditions that constitute our Shipping Policy.
We only deliver to mainland UK excluding the Scottish Isles. All other areas, please call for pricing.
All orders are processed within 2-3 business days. Orders are not shipped or delivered on weekends or public holidays.
If we are experiencing a high volume of orders, shipments may be delayed by a few days. Please allow additional days in transit for delivery. If there will be a significant delay in shipment of your order, we will contact you via email or telephone.
Shipping charges for your order will be calculated and displayed at checkout.
| Shipment method | Estimated delivery time | Shipment cost |
| Standard | 3-5 business days | As specified at checkout |
Delivery delays can occasionally occur.
You will receive a Shipment Confirmation email once your order has shipped containing your tracking number(s). The tracking number will be active within 24 hours.
Felt Products Northern Ltd is not responsible for any customs and taxes applied to your order. All fees imposed during or after shipping are the responsibility of the customer (tariffs, taxes, etc.).
Felt Products Northern Ltd is not liable for any products damaged or lost during shipping. If you received your order damaged, please contact the shipment carrier to file a claim.
Please save all packaging materials and damaged goods before filing a claim.
We currently do not ship outside the UK.
Our Return & Refund Policy provides detailed information about options and procedures for returning your order.
