Why Choose a Single Ply Roofing System?

Fire Safety

Single-ply roof systems are a popular waterproofing solution for either new build or roof refurbishment projects. Sika single-ply roof systems are classified to BRoofT4, so can easily satisfy regulatory requirements for fire performance.  They are ideal for buildings with a weight and load-bearing consideration because of the membrane’s structural strength. Along with BBA accredited durability, Sika single-ply roof systems are quick to install, which makes them a cost-effective solution. 

With some of our membranes being as thick as 2.5mm, Sika Sarnafil AT has the flexibility and longevity of a traditional PVC single-ply membrane but is a hyrbid FPO membrane and as the only UK roofing membrane to be certified in Cradle to Cradle, it is our most robust and sustainable single ply solution.

Sika Single Ply Roof Systems Product Set Achieves Verification from CCPI

Single Ply CCPI

We’re delighted that Single-ply roof systems by Sika has become one of the first products on the UK market to carry the CCPI mark, helping to provide assurance to product users that the product information for these products is clear, accurate, accessible, up-to-date and unambiguous. We’re proud to be working proactively with the CCPI to raise standards in our product information management.



Sika's single ply roof membranes, Sika Sarnafil and Sikaplan are an ideal waterproofing solution where the system requires:

  • High durability
  • Fire-resistant and fire retardant (All of Sika's single ply membranes have completed Extended Application (EXAP) fire testing)
  • Chemical resistant
  • Resistant to UV and natural elements such as harmful microorganisms
Sarnafil AT logo

Sika Single Ply High Performance Solutions

Sika is renowned throughout the world for providing high-quality, long-lasting single-ply roofing solutions. Our waterproof single-ply roofing membranes are suitable for most types of roof design applications, on steel, timber, and concrete structures, and for warm, cold and inverted roofs. Whether it’s a flat, pitched, vertical, waveform, domed, concave or convex roof, we can provide a solution for almost any type of roof structure. 

Sika offers two key technologies - polyvinyl chloride (PVC) membranes and thermoplastic or flexible polyolefin (TPO/FPO) membranes. All of our single ply membranes maintain an independent British Board of Agrément (BBA) certification, stating the life expectancy is ‘in excess of 40 years’ for PVC and 25 years for TPO/FPO.  

Sika PVC and FPO membranes are manufactured at our facility in Switzerland, a country renowned for quality. The production facilities are state of the art, with quality control to ISO 9001 and the membranes are CE marked to BS EN 13956 : 2005.   

Our singly ply membranes are dimensionally stable due to their reinforcement, meaning that they do not shrink or lose their shape. They are UV resistant and are tested for UV ageing to the highest international standard for waterproofing membranes which requires exposure to 5,000 hours of UV testing. However, we go above and beyond, with our membranes withstanding 10,000 hours of UV exposure.

Along with compliance with an ISO 14001 Environmental Management System, our membranes have a low environmental impact and when used in conjunction with a high performance thermal insulant can significantly improve the energy performance of a building.

Sika Sarnafil, School Roof Refurbishment

Single Ply Application Methods

Mechanically Fixed

Ideal application method for lightweight metal deck structures and buildings, such as distribution and logistics centers, warehouses, supermarkets, datacentres. Where there is a greater force of wind around the roof area, a single ply mechanically fixed system is required.

Sika-Trocal Mech Fixed System Build Up


Usual application method for public and residential buildings, including schools, offices, hotels, hospitals, apartments, stadiums, sports centers, plus all types of renovation and repair projects.

Sika Single Ply Project, Elgin Primary School

Next Generation of Single Ply Membranes

As the first and only UK roof membrane to be silver certified in Cradle to Cradle, Sarnafil Advanced Technology is the next generation of single ply membranes.In 2022, we introduced a new innovative single ply membrane to the UK market, Sarnafil Advanced Technology. This sustainable membrane, has the flexability of PVC and the sustainable features of a TPO membrane. It does not contain heavy metals, oils, chlorine or plasticisers.

Sika Single Ply Projects