Sarnafil AT

Sarnafil AT is a multi-layer synthetic membrane based on flexible polyolefins (FPO) with an internal fabric and backing.

What is Sarnafil AT?


Sarnafil AT is a multi-layer synthetic membrane based on flexible polyolefins (FPO) with an internal fabric and backing. Sarnafil AT is a hot air weldable single ply roof membrane formulated for direct exposure and designed for use in all global climatic conditions. Sarnafil AT is also the first roofing membrane in the market to have Silver CRADLE TO CRADLE accreditation and the only FPO with 35 years durability.

What is cradle to cradle?

CRADLE TO CRADLE CERTIFIED® is a globally recognized measure of safer, more sustainable products, made for the circular economy.

Product developers, manufacturers and brands around the world rely on the Cradle to Cradle Certified® Product Standard as a transformative pathway for designing and making products with a positive impact on people and the planet. To receive certification, products are assessed on environmental and social performance across five critical sustainability categories:

  • Material Health
  • Material Reutilization
  • Renewable Energy
  • Water Stewardship
  • Social fairness

Sustainable roofing solutions

Long-lasting, high-performance roofing systems can make a major contribution to sustainable construction.

Raw materials, production, application, the use phase and maintenance have significant influence on the overall sustainability performance of roofing applications.

What are the benefits for specifiers and building owners?

  • No oils, plasticizers or precarious heavy metals, ideal for sustainable buildings.
  • Sarnafil® AT is Silver Cradle to Cradle® certified in sustainability performance.
  • QUV tested for long-term service and durability for decades.
  • High resistance to impact damage, which helps to avoid punctures during installation and service.
  • A unique robust hybrid single ply technology  
  • Easy, faster application and detailing work. Self-adhesive tapes and membranes for detailing and upstands.
  • Easy to weld and produce reliable welds like PVC, but also with an even wider welding temperatures window.
  • Highly flexible, even at low temperatures, which allows faster rollout of the membranes on site.

What is it used for?

Sarnafil AT can be used for mechanically fixed roofing systems, loose laid ballasted roofs with different ballast materials for example gravel or concrete slabs. It can be used for Green roofs (intensive, extensive) utility roofs, inverted roofs and terraces with pedestrian traffic.

What does it look like?

Sarnafil AT can be installed in Window Grey RAL 7040 or Basalt Grey RAL 7012.

What are its advantages?

  • Resistant to UV exposure
  • Resistant to permanent wind exposure
  • Resistant to all common environmental influences
  • Hot air weldable
  • No open flame equipment required
  • High dimensional stability from glass fleece inlay
  • Resistant against impact load and hail
  • Resistant to mechanical influences
  • Resistant to root penetration
  • Compatible with old bitumen

Sarnafil AT can only be installed by experienced professionals.