For decades, roofing was viewed primarily through the lens of durability and cost. However, as the global building sector accounts for a massive portion of carbon emissions, the focus has shifted toward materials that minimize environmental impact without sacrificing performance. The NSF/ANSI 347 standard (accessible via NSF International
Major municipal water departments (e.g., Los Angeles Department of Water and Power, New York City DEP, Toronto Water) now explicitly require in their specifications. Contractors using older-certified gaskets face immediate rejection and potential blacklisting. nsfs 347 2021
Incentivizing "take-back" programs and recycling initiatives to prevent old roofing membranes from ending up in landfills. Industry Impact and Transparency For decades, roofing was viewed primarily through the
For architects and specifiers, this standard simplifies the complex task of material selection. By choosing a product certified to NSF/ANSI 347, professionals can ensure they are meeting high benchmarks for sustainability that are recognized by major green building programs. Notably, products certified under this standard can earn points toward certification, making them highly desirable for high-performance building projects. Conclusion By choosing a product certified to NSF/ANSI 347,
The standard was developed by the and published in 2021 .