Duro-Last Certifications

Duro-Last® is pleased to announce that it has achieved certifications for each of its roofing membranes under the NSF American National Standard for Sustainable Roofing Membranes NSF/ANSI 347. Awarded platinum certification in 2016 for all colors of the Duro-Last membrane in 40, 50, and 60 mil options, this certification was approved for renewal and expanded to include the Duro-Last Rock-Ply® and Shingle-Ply® Designer Series membranes. Additionally, the 2016 gold certification for the reflective white Duro-Tuff®, Duro-Fleece®, and Duro-Last EV membranes was also renewed and expanded to include all colors for Duro-Tuff and Duro-Fleece, as well as the Duro-Fleece Plus® membrane.

Duro-Last continues to be one of only two manufacturers to achieve the highest-level platinum certification, and now leads the industry in certified membranes under NSF/ANSI 347. As specifiers and building owners increasingly demand environmentally conscious solutions for their projects, Duro-Last’s commitment to developing and fostering high-quality, sustainable products ensures that a variety of options are available for all types of commercial roofing needs.

NSF/ANSI 347 is the leading consensus standard for evaluating and certifying sustainable attributes of single-ply roofing membranes over their entire life cycle. They use a point system to evaluate roofing membrane products against established prerequisite requirements, performance criteria, and quantifiable metrics in five key areas: product design, product manufacturing, membrane durability, corporate governance, and innovation.

Duro-Last, Inc. is a manufacturer of custom-fabricated, thermoplastic single-ply roofing systems. Factory controlled custom-fabrication can eliminate up to 85% of field seams, resulting in lower on-site labor costs and easier installation. Duro-Last’s roofing systems are sustainable and durable. Over two billion square feet of Duro-Last membrane has been installed throughout North America. Duro-Last is headquartered in Saginaw, Michigan, with additional manufacturing facilities in Grants Pass, Oregon; Jackson, Mississippi; Sigourney, Iowa; Carrollton, Texas; and Ludlow, Massachusetts.

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