Polyglass U.S.A. Inc. has announced important new updates to Polyfresko, a highly-reflective, white modified bitumen membrane cap sheet used as the final layer in a multi-ply roof system or as a flashing membrane.
According to the company, independent laboratory testing confirms Polyfresko’s superior granule embedment and documents its aged reflectivity performance – with both outperforming all major competitors in the granulated “bright white” cap sheet category.
Granule embedment was tested using ASTM D4977 Standard Test Method for Granule Adhesion to Mineral Surfaced Roofing by abrasion. The recently completed 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 high-performing 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.
“Granule loss is one of the challenges with modified bitumen membranes, and our new granule adhesion testing results show that Polyfresko is a premium solution, firmly positioned as a top performing product,” says Polyglass CEO Natalino Zanchetta. “The granule adhesion results achieved with our CURE Technology, together with our new three-year weathering milestone, demonstrate our leadership with asphaltic membrane cap sheet performance.”