Sarnafil® AT is a patented hybrid roofing membrane that combines flexible polyolefin (FPO) and elastomer technologies in a single waterproofing solution. Developed for mechanically fixed and ballasted roofing systems, Sarnafil® AT provides a durable, hot-air weldable roofing membrane suitable for a wide range of flat roof applications. By combining the characteristics of existing membrane technologies, Sarnafil® AT has been developed to offer durability, flexibility and ease of installation while providing design freedom to meet different project requirements.
The Sarnafil® AT membrane is based on flexible polyolefins (FPO), with internal fabric reinforcement and backing in accordance with EN 13956. The membrane is formulated for direct exposure in all climatic conditions and is fully compatible with existing Sarnafil® T accessories and ancillary components.
Applications
Sarnafil® AT roofing membranes are suitable for:
- Mechanically fastened systems
- Ballasted roof systems
- Green roof systems (extensive and intensive)
- Inverted roof systems
- Terraces with pedestrian traffic
Key Features & Benefits
- Hot-air weldable membrane technology
- No open flames required during installation
- Resistant to UV exposure
- Resistant to wind uplift
- Resistant to root penetration
- Resistant to impact loading and hail
- Resistant to all common environmental influences
- High dimensional stability with glass fleece inlay
- Resistant to mechanical influences
- Compatible with existing bitumen roofing systems
- Suitable for a wide range of roof waterproofing applications
- FM Approved and Cradle to Cradle Certified™
Sarnafil® AT Technology
Sarnafil® AT is an elastomer-modified FPO roofing membrane that combines the properties of thermoplastic and elastomer materials.
Thermoplastic Benefits
The thermoplastic component enables efficient hot-air welding, creating secure membrane joints without the need for solvents or open flames.
Elastomer Benefits
The elastomer component provides flexibility and elasticity, even at lower temperatures, while helping the membrane maintain its shape after deformation.
By combining these technologies, Sarnafil® AT offers easy weldability, safe and easy application, flexibility and durability.
Advantages for Specifiers and Building Owners
Cradle to Cradle Certified™
Sarnafil AT® is the first and only thermoplastic roofing membrane in the market to be Cradle to Cradle Certified™.
Hail Resistance
High resistance to impact and damage e.g. hail, to ensure a longer service life.
Long Term Performance
QUV tested for long-term service and durability for decades.
Advantages for Contractors
Highly Flexible
Highly flexible like EPDM, even at low temperatures, which allows faster rollout of the membranes on site.
Easy to Apply, Faster Installation
Easy, faster application and detailing work. Self adhesive tapes and membranes for detailing and upstands.
Hot Air Weldable
Easy to weld and produce reliable welds like PVC, but also with an even wider welding temperatures window.
Compatible
A wide variety of accessories are available, as it is compatible with all existing Sarnafil® FPO systems.
Impact/Puncture Resistance
High resistance to impact damage, which helps to avoid punctures during installation and service.
Welded Seam Performance
Seam collapse test value of more than 3 times that of EPDM, for long-lasting waterproof seams.
FM Approved
The Sarnafil® AT membrane is FM Approved. FM Approvals is an international leader in third-party testing and certification services. They test property loss prevention products and services to verify they meet rigorous loss prevention standards of quality, technical integrity and performance.
Cradle to Cradle™ Certified
Sarnafil® AT is the first thermoplastic roofing membrane to be Cradle to Cradle Certified®.
The membrane achieved an overall Silver certification level under Version 3.1 of the Cradle to Cradle Products Standard and received Gold-level scores in the Material Reutilization and Social Fairness categories.
This certification provides architects, specifiers and building owners with assurance that the product has been independently assessed regarding sustainability and circular economy principles. Find out more about Cradle to Cradle and their assessment process: https://c2ccertified.org/
Sarnafil® AT FSH Self-Healing Technology
Sarnafil® AT FSH combines a synthetic, elastomer-modified membrane with a water-reactive polymer integrated into the felt backing.
This polymer reacts with water to repair mechanical damage, such as punctures or cuts in the membrane, which can occur during typical roofing applications. When water comes into contact with the polymer it swells and closes the puncture, retaining the moisture within the polymer layer and preserving the building’s integrity and protecting its contents.
For projects where roof reliability and asset protection are critical, Sarnafil® AT FSH offers an innovative roofing solution.
