SURE-WELD® TPO Roofing Membrane
CARLISLE® SURE-WELD® TPO Roofing: The sustainable, high-performance flat roofing system perfect for large projects.
SURE-WELD® TPO is a single-ply, heat-weldable thermoplastic polyolefin (TPO) membrane ideal for large commercial and industrial roofing projects. It is a sustainable choice, made with recycled materials and low VOC emissions.
SURE-WELD® TPO is durable, has already been proven on over 500 million m² buildings worldwide and is now available for architects, specifiers and contractors in the UK.
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SURE-WELD® TPO Membranes
Benefits of TPO Roofing
Our SURE-WELD® TPO Product Portfolio
With our SURE-WELD® TPO membrane products, you are equipped for all the challenges your projects present. Discover your possibilities for sustainable waterproofing with CARLISLE®!
FM Approval Certification for SURE-WELD® TPO
FM Approval is an internationally recognised certification that stands for the highest standards in safety, quality, and performance. Within the construction industry, particularly in roofing and waterproofing systems, this certification is becoming increasingly important.
The SURE-WELD® TPO waterproofing membranes from CARLISLE® are FM Approved – a clear testament to their superior quality, safety, and durability.
Benefits of FM Approval Certification for SURE-WELD®
Maximum Reliability & Quality: SURE-WELD® has undergone rigorous testing and meets the highest standards for long-term durability, weather resistance, and mechanical strength.
Enhanced Fire Safety: In critical environments such as industrial and public buildings, warehouses, and office complexes, FM Approval ensures that the roofing system meets stringent fire safety regulations.
Cost Efficiency Through Insurance Benefits: Since FM Approved systems comply with the requirements of many insurance providers, having an FM Approved roofing system can contribute to lower insurance premiums.
Global Acceptance: FM Approval certification means that SURE-WELD® is suitable for international projects – particularly for companies insured by FM Global.
With SURE-WELD® TPO, you not only get a high-performance waterproofing membrane but also the assurance of a globally recognised quality certification.
SURE-WELD® TPO Roofing Accessories
SURE-WELD® TPO is a complete waterproofing system with an extensive range of accessories. Our wide range of system accessories includes everything you need to waterproof corners and edges, roof penetrations or for any specific installation requirements.
All system components are compatible with our membranes and are aesthetically pleasing too.

Technical Data
| Material properties | Value | |
|---|---|---|
| Total thickness | 1.5 mm -5% / +10% | |
| Surface weight | 2.19 kg/m2 -5% / +10% | |
| Standard delivery length per roll | 20 m -0/+5% | |
| Width supplied | 1100 mm / 1520 mm / 1830 mm and 2440 mm (white only) (tolerances according to standard EN 13956) | |
| Storage life | 10 m -0/+5 % | |
| Stress from external fire | B ROOF (t4)* | |
| Fire behaviour | Class E |
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