: High-tier certified single-ply membranes optimize the building envelope, significantly reducing HVAC loads and countering the urban heat island effect in dense municipal areas. 5. Market Adoption and Industry Impact
The standard heavily rewards manufacturers for conducting a comprehensive Life Cycle Assessment (LCA) and publishing verified Environmental Product Declarations (EPDs). An EPD is a standardized, third-party-verified document that transparently reports a product's environmental impact, from raw material extraction through manufacturing, transportation, use, and end-of-life. By earning points for these actions, the standard promotes honesty and data-driven decision-making for specifiers.
Since its initial publication in 2012, NSF/ANSI 347 has played a pivotal role in driving the roofing industry toward more sustainable practices. It has spurred innovation in membrane formulations, manufacturing processes, and recycling programs. As one of eight consensus-based sustainability standards developed by NSF for building products, its success has paved the way for similar standards in other product categories. nsfs 347 2021
Gaskets must meet ANSI/ASME B16.21 or ISO 7483 dimensions, with a new allowance for thermal expansion in PTFE-based materials. The 2021 edition adds a maximum warpage of 0.5 mm per 100 mm of gasket length.
The keyword represents the premier international consensus standard for evaluating and certifying the sustainability profile of single-ply roofing membranes throughout their entire product life cycle. Maintained by NSF International and accredited by the American National Standards Institute (ANSI), the 2021 edition of this standard serves as a critical tool for architects, specifiers, and building owners looking to eliminate "greenwashing" and verify legitimate eco-friendly building envelope materials. An EPD is a standardized, third-party-verified document that
To achieve certification under NSF/ANSI 347, a commercial roofing membrane must earn points across a maximum . This matrix ensures that a high score in one category cannot mask severe deficiencies in another. 1. Product Design (42 Maximum Points)
True sustainability extends to social responsibility and corporate accountability. This section evaluates the manufacturer's corporate ecosystem: Duro-Last® and NSF/ANSI 347 To achieve certification under NSF/ANSI 347
The NSF/ANSI 347 standard was the first of its kind in North America: a consensus-based, American National Standard (ANSI) specifically created to define and measure the sustainability of single-ply roofing membranes. It was developed to provide a consistent and transparent framework for evaluating a roofing product's environmental performance across its entire life cycle, addressing a critical gap in "green" building practices.
The standard is the premier multi-attribute consensus framework used to evaluate and certify the lifecycle sustainability of single-ply roofing membranes . Developed jointly by NSF International and the American National Standards Institute (ANSI), this standard acts as the rigorous benchmark for architects, facility managers, and building specifiers seeking to eliminate "greenwashing" and verify authentic environmental claims.
NSF/ANSI 347-2021 is the current American National Standard for evaluating and certifying the sustainability of single-ply roofing membranes across their entire life cycle. Core Evaluation Categories
Includes social responsibility metrics, public disclosures, and commitment to community investment. Innovation (7 points):