NSF/ANSI 347 is the first American National Standard developed specifically for evaluating and certifying the sustainable attributes of single-ply roofing membranes over their entire life cycle. Unlike generic "green" claims, this standard provides a comprehensive, third-party verified framework for assessing a product's environmental impact from design and manufacturing to installation and end-of-life.
The significance of NSF/ANSI 347-2021 lies in its ability to provide transparency
As one of the most heavily weighted categories, product manufacturing quantifies the environmental impacts of the production process. This includes measuring energy use, water consumption, greenhouse gas emissions, and waste generation. The standard rewards manufacturers who actively work to reduce or eliminate these negative impacts, promoting cleaner and more efficient manufacturing practices.
Products under review earn specific tiers of compliance depending on the total point score verified by independent auditors during on-site facility inspections. Certification Level Requirements & Market Meaning nsfs 347 2021
"NSFS" could also be a typo for , the South African National Standard for the classification and regulation of pressure equipment, such as boilers, pressure vessels, and compressed air systems. This standard uses a risk-based classification system and requires the involvement of an Approved Inspection Authority (AIA). A 2021 version of SANS 347 might exist, making this another plausible interpretation.
Developed through an ANSI-accredited consensus process involving manufacturers, government agencies, and environmental NGOs, NSF/ANSI 347 is the first standard of its kind for the building envelope. It covers common single-ply materials including: (Polyvinyl Chloride) TPO (Thermoplastic Polyolefin) EPDM (Ethylene Propylene Diene Terpolymer) KEE (Ketone Ethylene Ester) The Five Pillars of Assessment
The NSF/ANSI 347 standard provides a rigorous framework for architects, specifiers, and building owners to identify roofing products with reduced environmental impacts. The 2021 version represents the latest consensus-based updates from the NSF Joint Committee on Sustainable Single Ply Roofing . Key Evaluation Criteria NSF/ANSI 347 is the first American National Standard
The represents the premier, consensus-based standard for evaluating the full environmental and social impact of these materials.
If you want to delve deeper into sustainable construction materials, let me know if you would like to:
: The minimization or complete elimination of hazardous chemicals and heavy metals. why it matters
When verifying compliance, specifiers should consult official repositories like the NSF Product and Service Listings to ensure active, third-party audited status. Proactive Next Steps
Roofing membranes, such as those from manufacturers like Duro-Last , earn points based on their adherence to these criteria. They are then awarded one of four certification levels: Silver Gold (e.g., the white Duro-Last membrane) Platinum Importance in Sustainable Building Ralph M. Paroli - Standards Council of Canada
The highest tier, representing maximum innovation, material circularity, and corporate accountability. Why the 2021 Update Matters to the Industry
This article explores what NSF/ANSI 347-2021 entails, why it matters, and how it shapes the future of sustainable roofing. What is NSF/ANSI 347?
Encouraging the use of recycled content and the reduction of hazardous chemicals during the formulation phase. Product Manufacturing: