New NSF standard provides manufacturers, specifiers and the building industry with verifiable, objective criteria to evaluate sustainable roofing products

ANN ARBOR, Mich. — NSF Sustainability, a division of NSF International that includes sustainability standards development, testing, certification and claims validation for commercial, consumer and green products as well as claims verification, has certified the first roofing membrane product under the new NSF American National Standard for Sustainable Roofing Membranes - NSF/ANSI 347. GAF, the largest manufacturer of commercial and residential roofing in North America, is the first company to earn certification for its single ply roofing membrane product line Everguard TPO, providing architects and contractors with a certified sustainable option for roofing membranes.

NSF/ANSI 347: Sustainability Assessment for Single Ply Roofing Membranes provides a framework for assessing the environmental and societal impacts of single ply roofing membranes across the product life cycle - from raw material extraction through manufacturing, use and end-of-life management. By earning certification, GAF demonstrates its commitment to apply sustainable approaches to product development and corporate operations.  Certification also differentiates its products in the marketplace, enabling a preferred vendor status with those that seek sustainable products.

NSF/ANSI 347 Certification to NSF/ANSI 347 is based on point totals to achieve a conformant, silver, gold or platinum level certification. GAF’s single ply roofing membranes earned conformant level certification and GAF can use the NSF Sustainability Certified Mark on products and in advertising. Certified products are publicly listed on NSF’s website.

NSF/ANSI sustainability assessment standards are recognized by companies, organizations and governments as credible tools to identify and source sustainable products. For example, the U.S. Government Services Administration (GSA) through Executive Order 13514 has set a goal to ensure 95 percent of all new contracts require products and services with more sustainable attributes (e.g., energy and water efficient, recycled), many of which are identified as criteria in NSF/ANSI 347.

“Architects and contractors are under more pressure to identify and source sustainable building materials. Certification from an independent third party to a national standard brings both credibility and science to this process. By being the first company to earn certification, GAF demonstrates its leadership in the roofing industry and provides customers with a certified sustainable option,” said Tom Bruursema, General Manager of the NSF International Sustainability division.

“Earning NSF Sustainability certification demonstrates our commitment to providing customers with the sustainable roofing membranes they need to meet their sustainability goals, as well as the purchasing requirements of their clients,” said Marty Grohman, GAF’s Director of Sustainability.

To earn certification, GAF’s single ply roofing membranes and manufacturing process had to meet multi-attribute criteria outlined in NSF/ANSI 347. The standard employs a point system to evaluate roofing membrane products against established requirements, performance criteria and quantifiable metrics in five key areas:

  •  Product Design – Integration of environmental and life cycle thinking into the product design process
  •  Product Manufacturing – Quantification of the environmental impacts from manufacturing, and actions to reduce or eliminate those impacts
  •  Membrane Durability – Membrane physical properties, service life and repairability
  •  Corporate Governance – Human rights, child labor, forced labor, employee safety and education, and community responsibility
  •  Innovation - Advancements beyond the requirements for product design, product manufacturing and long-term value

How the NSF/ANSI 347 Standard Was Developed

NSF International, which has developed more than 80 American national public health and sustainability standards, developed the standard in partnership with a diverse group of stakeholders through the NSF National Center for Sustainability Standards (NCSS). The NCSS used the American National Standards Institute (ANSI)-accredited consensus process to develop NSF/ANSI 347, which included input from manufacturers, suppliers, regulatory officials, academia, industry representatives and end users.

Membrane products covered by NSF/ANSI 347 include, but are not limited to, membranes produced from EPDM (ethylene propylene diene terpolymer), KEE (ketone ethylene ester), PVC (polyvinyl chloride), TPO (thermoplastic polyolefin) and PIB (polyisobutylene) polymers.

For additional information, download the NSF/ANSI 347 brochure or contact Dennis Gillan at (734) 476-2543 To purchase a copy of NSF/ANSI 347, please visit the NSF Bookstore.

Editor’s note: To schedule an interview with NSF Sustainability General Manager Tom Bruursema, contact Greta Houlahan at 734-913-5723 or

About NSF International: NSF International is an independent global organization that writes standards, and tests and certifies products for the construction, food, water and consumer goods industries to minimize adverse health effects and protect the environment ( Founded in 1944, NSF is committed to protecting human health and safety worldwide. NSF is a World Health Organization Collaborating Centre for Food and Water Safety and Indoor Environment.

NSF Sustainability draws upon this expertise in standards development, product assurance and certification, advisory services and quality systems management to help companies green their products, operations, systems and supply chains. Through its National Center for Sustainability Standards, NSF has developed sustainability standards for product categories such as chemicals, building products and materials, and water quality. NSF works with leading regulators, scientists, engineers, public health and environmental health professionals, and industry representatives to develop these transparent, consensus-based standards.

Additional NSF services include Education and Training, safety audits for the food and water industries, nutritional/dietary supplement certification, organic certification provided by QAI (Quality Assurance International) and management systems registrations delivered through NSF International Strategic Registrations (NSF-ISR). NSF-ISR services include ISO 14001 Environmental Management Systems registration, Sustainable Forestry Initiative (SFI) and Chain of Custody (COC) certifications.

About GAF: Now proudly celebrating over 125 years in the industry, GAF has become the largest roofing manufacturer in North America, with sales of nearly $3 billion annually. The company’s products include a comprehensive portfolio of steep-slope and commercial roofing systems, which are supported by an extensive national network of factory-certified contractors. Its success is driven by a commitment to provide property owners and specifiers with the best and safest choice in roofing and by helping supportive contractors and distributors to build their businesses and avoid hassles.

With a focus on social responsibility, GAF has developed Advanced Protection® Shingle Technology, which provides superior durability and wind resistance while reducing the use of scarce natural resources. The company has also developed single-ply and asphaltic membranes with superior durability and high reflectivity to meet the most rigorous industry standards while helping commercial property owners and designers reduce energy consumption.

The company also supports the roofing industry through CARE, the Center for the Advancement of Roofing Excellence, which has provided education to over 125,000 professionals. CARE’s mission is to help professional contractors and distributors build their businesses through sales and management education, and to provide product and installation training to contractors, distributors, architects, property owners, and related industry personnel. For more information about GAF, visit

CONTACT: Greta Houlahan
NSF International
Phone: 734-913-5723