£57.99
In stock
3 in stock (can be backordered)
Create a strong and dependable built-up flat roofing system with SupaTec SBS Torch-On Sand Finish Underlay, a professional-quality 2.2mm SBS modified bitumen roofing felt designed for use beneath a compatible mineral cap sheet.
Supplied in a generous 15m x 1m roll, this heavy duty roofing underlay provides approximately 15m² of coverage before allowing for overlaps, making it ideal for garages, extensions, outbuildings, workshops and a wide range of residential and commercial flat roofing projects.
Featuring a fine sand finish on the upper surface and a plastic film finish underneath, SupaTec provides a durable base layer for multi-layer torch-on roofing systems.
SupaTec Sand Finish Underlay is manufactured from SBS modified bitumen, providing a strong and flexible waterproof membrane designed specifically for built-up felt roofing systems.
The underlay forms the lower waterproof layer beneath a compatible roofing cap sheet, helping create a robust roofing system capable of providing reliable long-term protection.
For customers searching for torch-on roofing felt underlay, SBS felt underlay, sand finish roofing felt or 2.2mm torch-on felt, SupaTec provides a professional and cost-effective solution.
Unlike a mineral cap sheet, this SupaTec membrane has a fine sand finish and is designed specifically to form an underlay within a multi-layer roofing system.
The sanded upper surface provides a suitable base for the next layer of roofing felt, while the plastic film underside allows the membrane to be torch applied to a correctly prepared substrate.
The finished roof should then be completed using a suitable mineral roofing cap sheet designed for external exposure.
SupaTec SBS Sand Finish Underlay is suitable for a wide range of flat and low-pitched roofing projects, including:
The membrane is manufactured using SBS (Styrene-Butadiene-Styrene) modified bitumen, a material widely used in professional built-up roofing systems.
SBS modification improves the flexibility and performance of bituminous roofing membranes, creating a durable underlay suitable for demanding roofing applications.
This makes SupaTec an excellent choice for customers looking for heavy duty SBS roofing felt, torch-on bitumen underlay or a professional alternative to lightweight roofing felt.
Each roll measures 15 metres long by 1 metre wide, providing approximately 15 square metres of material before allowing for side and end overlaps.
The longer 15m roll provides useful coverage for larger roof areas and can help reduce the number of separate rolls required when compared with shorter roofing membranes.
It is particularly well suited to:
At approximately 2.2mm thick, SupaTec provides a substantial waterproof underlay while retaining the flexibility needed for professional roof installation.
Combined with its SBS modified bitumen construction, the membrane creates a strong foundation for the final roofing cap sheet.
For customers comparing different systems, the 2.2mm thickness is an important specification and a useful search term when looking for compatible flat roofing materials.
SupaTec Sand Finish Underlay can be installed using the traditional torch-on roofing method.
During installation, heat is carefully applied to activate the bitumen on the underside of the membrane, allowing it to bond securely to a correctly prepared roof substrate.
When properly installed, this creates a strong and continuous waterproof layer beneath the roof’s final cap sheet.
Important: Torch-on roofing involves the use of an open flame and should only be carried out by suitably trained and competent installers using appropriate equipment and fire-safety precautions.
Where flame application is unsuitable, SupaTec may also be fitted using a compatible cold roofing felt adhesive, subject to the adhesive manufacturer’s instructions and the specification of the roofing system.
This provides greater installation flexibility, particularly on projects where torch application may not be appropriate.
This product is intended to be used as an underlay and should not normally be used as the exposed final roof covering.
A typical built-up felt roofing system may consist of:
The underlay provides an additional waterproof layer while the mineral cap sheet forms the exposed weather-resistant surface of the completed roof.
SupaTec Sand Finish Underlay is suitable for both new flat roof installations and refurbishment projects.
Whether you’re replacing an ageing felt roof, constructing an extension or installing a new garage or workshop roof, this professional SBS underlay provides a dependable base for a complete felt roofing system.
Choose SupaTec SBS Torch-On Sand Finish Underlay 15m x 1m – 2.2mm for a strong and dependable waterproof base layer designed for professional built-up flat roofing systems.
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.
