NSFS 347 2021 is to NSF 61 – meaning a gasket can pass NSF 61 for chemical safety but still fail NSFS 347 due to poor creep resistance.
A roof cannot be sustainable if it fails prematurely. This category tracks physical performance attributes, service life predictability, and ease of repairability. High-performing membranes must prove they can withstand extreme climate zones, weathering, and thermal stress over a multi-decade lifespan. IV. Corporate Governance
Measures long-term performance in various climate zones, emphasizing that a longer-lasting roof reduces overall environmental impact. nsfs 347 2021
Integration of life cycle thinking, use of bio-based or recycled content, and elimination of chemicals of concern.
, a standard originally published in 2012 and regularly updated (with a version relevant to current industry benchmarks in 2021). It is the first American National Standard to evaluate and certify the life-cycle sustainability of single-ply roofing membranes used on commercial buildings. BuildingGreen Overview of NSF/ANSI 347 NSFS 347 2021 is to NSF 61 –
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.
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. Integration of life cycle thinking, use of bio-based
Achieved by industry leaders featuring optimized LCAs and highly efficient formulations.
[Prerequisites Met] ──> Certified ──> Silver ──> Gold ──> Platinum (Highest) 4. Why the 2021 Standard Matters for Specifiers
To earn certification, manufacturers like Duro-Last and Sika are evaluated across five key areas: