The standard is a consensus-based document that evaluates products across their entire life cycle, from raw material extraction to manufacturing, use, and end-of-life management. Key Areas of Evaluation (The Point-Based System)
The standard evaluates roofing membranes not on a single characteristic, but across four distinct categories. Manufacturers earn points in each area to achieve a final certification level.
Understanding NSF/ANSI 347-2021: The Gold Standard for Sustainable Roofing Membranes nsfs 347 2021
The standard uses a rigorous point-based system to evaluate membrane performance across several key areas, including product design, manufacturing impacts, durability, corporate governance, and innovation. By addressing the building envelope, NSF/ANSI 347 helps architects and specifiers make educated, data-driven choices for sustainable roofing materials.
For architects and building professionals, NSF/ANSI 347 simplifies the complex task of specifying sustainable roofing. Instead of evaluating a plethora of environmental claims, specifiers can rely on the NSF mark to indicate a product that has been rigorously vetted against a national standard. This reduces risk and liability associated with greenwashing and ensures that specified products meet clear, performance-based criteria for sustainability. The standard is a consensus-based document that evaluates
The 2021 revision became on January 1, 2022. For previously certified products under NSF 347 2017, a transition period was allowed until December 31, 2023. As of 2024, any gasket sold or advertised as "NSF 347 certified" without meeting the 2021 edition is non-compliant.
: The tension eventually shifts from conflict to an illicit relationship, which is the primary focus of the production. Instead of evaluating a plethora of environmental claims,
Depending on the total number of points scored across the five pillars, a roofing membrane is awarded one of four sequential certification levels: Certification Level Requirements Meets all mandatory prerequisites Silver Meets prerequisites + minimum optional point threshold Gold Meets prerequisites + intermediate optional point threshold Platinum Meets prerequisites + highest tier of optional points
As we look toward 2021 and beyond, the role of standards like NSF/ANSI 347 becomes even more critical in the global effort to mitigate climate change. By providing a transparent and comprehensive framework for sustainability, the standard drives innovation in the roofing industry, pushing manufacturers to create products that are not only durable and effective but also environmentally responsible for generations to come.
This standard evaluates the entire life cycle of single-ply roofing membranes, helping architects, contractors, and building owners choose products that are environmentally responsible, durable, and sustainable. What is NSF/ANSI 347?