The 2021 revision replaces all prior versions (2017, 2013, etc.), introducing updated chemical extraction limits, mechanical performance tests, and stricter material safety criteria.
Look for the on packaging or the manufacturer’s spec sheet. The mark will include the standard number (347) and year (2021 if updated). You can also search the NSF Certified Sustainable database online. nsfs 347 2021
Encourages manufacturers to integrate environmental thinking at the earliest stages of development, often called "enlightened design". The 2021 revision replaces all prior versions (2017,
Assesses the manufacturer’s sustainability policies and transparency. You can also search the NSF Certified Sustainable
For architects and specifiers, NSF/ANSI 347 serves as a valuable tool for selecting sustainable roofing products, which can contribute points toward green building certifications like LEED. For manufacturers, certification to NSF/ANSI 347 provides an objective and transparent way to validate the sustainability of their products and differentiate themselves in the marketplace.
In conclusion, NSF/ANSI 347-2021 is more than just a technical checklist; it is a roadmap for the future of the building envelope. By prioritizing life-cycle thinking, it ensures that the "top" of our buildings contributes to a healthier planet below. for manufacturers or its role in LEED certification