Polyglass U.S.A. Inc. has announced updates to Polyfresko, a white modified bitumen membrane cap sheet used as the final layer in a multi-ply roof system or as a flashing membrane.
Independent laboratory testing confirms Polyfresko’s granule embedment and documents its aged reflectivity performance. Granule embedment was tested using ASTM D4977 Standard Test Method for Granule Adhesion to Mineral Surfaced Roofing by abrasion. The three-year aged reflectivity testing was conducted in three different climate zones, and demonstrated that Polyfresko maintains reflectivity performance over time. The product was deemed suitable for most Cool Roof specifications due to Polyfresko’s initial and aged reflectivity and emissivity performance. The laboratory testing results enabled Polyfresko to gain Energy Star Certification.
Polyfresko is manufactured with proprietary CURE Technology, a thin film technology infused with ceramic microspheres, ultraviolet (UV) stabilizers, and proprietary resins. This increases weatherability and decreases maintenance costs by locking-in the granules, so the Polyfresko membrane maintains reflectivity performance over time, decreases UV degradation, and increases abrasion and impact resistance.
In addition, all Polyfresko products are now manufactured with FASTLap technology, a patented granule-free end lap that helps make the membrane watertight and increases speed of installation. Polyfresko is available in Polyglass’s APP (Atactic Polypropylene) and SBS (Styrene-Butadiene-Styrene) formulations and is adhered to the roof deck or other approved substrates by torching or self-adhered application.