Sika developed a new solution that allows fast and easy parapet roofing. But what is a parapet? A specific terminology applies when talking about flat-roofing: a parapet is a required connector to the vertical roof boundaries. Those connectors can be both a safety feature, designed to stop falls from the edge of the roof such as a load-bearing construction and a stylistic feature.

Sarnafil® AT Roofing System
Image: Roof parapet application

Next Generation Roofing:
Self-Adhering Strips as Part of Sarnafil® AT System  

Parapets often go unnoticed on modern houses, as they can appear as the line of a flat roof. While thermoplastic membranes can be installed very efficiently, this step requires considerable work effort. Therefore, Sika designed a solution that allows for easier and faster installation of this part of the roof. Sika combined the flexible TPO technology (thermoplastic polyolefin, single-ply roofing membrane) with self-adhered technologies. The result: highly flexible and self-adhering strips for roofing upstands.

The Sarnafil® AT FSA P product range enables fast and VOC-free application of roofing upstands. While the membrane is based on standard quality Sarnafil® AT, the self-adhered backing with Felt/Hotmelt/Release liner was part of the development project “TG 76 FSA”, a self-adhered TPO based roofing membrane. With several productions on the extrusion coating line M 41 in Sarnen/Switzerland, strips of different sizes were tested both in the lab and in contractor workshops, followed by roof installations during field-test phase with over all very positive results and feedback.

The final product range now consists of self-adhesive strips ranging from 0.33 to 1.0 m width in 3 colors, the customer can choose the option that fits best to the local demands on site.  In the field test and roll out phase, more than 25 km of parapets were successfully installed. The new solution now is already established in different countries.

Advantages:

  • self-adhesive
  • fast application
  • solvent-free, without flash-off times
  • bridging of unevenness through the fleece insert
  • long service life
  • resistant to mechanical impact
  • immediate liability
  • individual cutting of the 1.00 m roll possible through 2 welding edges

Sarnafil® AT FSA P - Roofing System

Master roll production
Image: Master roll production
Cutting to strips on M280
Image: Cutting to strips
Rolls – ready for packaging
Image: Rolls – ready for packaging