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The Path to a
Greener Roof
The roof is a huge part of any building project, and as the imperative for “greener” buildings grows, there is greater pressure to find an environmentally sustainable roof. But sustainability for membrane roofs had never previously been quantified. Duro-Last ® and NSF/ANSI 347
IN THE PAST
NSF/ANSI 347
The focus was on one or more of several individual attributes: • Volatile Organic Compounds (VOCs) released by the material or its installation • Energy savings of the roofing system • Recyclability of the raw material But there was no objective composite score.
New standard developed by major standards organizations (NSF, ANSI) with roofing industry stakeholders: • Architects • Roofing consultants • Engineers • Non-government organizations • Manufacturers
Based on total life cycle, NSF 347 quantifies and documents sustainable qualities of each membrane roofing material: • Polyvinyl chloride (PVC) • Thermoplastic polyolefin (TPO) • Ethylene propylene diene terpolymer (EPDM) • Ketone ethylene ester (KEE) • Polyisobutylene (PIB) products
Duro-Last did well in all three areas. But there was no way to compile “points” for a full, fair comparison to other products!
TOTAL LIFE CYCLE From raw material to disposal, NSF 347 rates each product in five different areas: Product design 42 points Product manufacturing 27 points Membrane durability 40 points Corporate governance 7 points Innovation 7 points Total 123 points
Product Manufacturing
During the manufacturing process, the maker practices:
• Conservation of energy • Conservation of water • Protection of clean air • Material waste reduction processes
Recycling Manufacturing Scrap Duro-Last recycles material in three ways: • Scrap is recycled back into production • Leftover material is reground to produce resilient commercial flooring • Pieces of off-spec membrane are used to make prefabricated roof accessories
Four levels of third-party verified certification: conformant (lowest), silver, gold, platinum (highest)
Corporate Governance
Is the manufacturer responsible to its stakeholders? • Training and outreach for installers and designers • A good corporate citizen • Good employer
Product Design
The membrane is made from environ- mentally sustainable raw material:
Duro-Last’s Community Commitment • Duro-Last community investment credit • Annual donation of roof to local church or school • Donated roof for new teaching hospital • Employees given opportunity to volunteer for Habitat for Humanity
• Minimal chemicals of concern • Informed selection of suppliers • Reclaims post-consumer single-ply roofing membrane
Membrane Durability
How long will it last? The roof’s service life is a key factor. It is measured by: • Quality control measures • Demonstrated durability in the field • How much the material itself contributes to durability
Innovation
For true sustainability, service life in the field is key. Two quality control measures must be in place: • Documented installer training program • Post-inspection protocol
• Increasing environmentally sustainable content
Has the company introduced new technology, or added sustainability value to old technology? Points awarded for:
• Reduction of energy consumption • Investment of capital in renewable energy at manufacturing plant • Reduced water consumption and minimization of waste materials
Want to Learn More? For more information about NSF/ANSI 347 and Duro-Last’s Platinum certification, visit duro-last.com/sustainability or contact us at 866-735-8824 .
“Duro-Last” and the “World’s Best Roof” are registered trademarks owned by Duro-Last, Inc. NSF347 Infographic Flyer 11.11.16 - DL140025
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