New NSF Standard provides manufacturers, specifiers and building industry with verifiable, objective criteria to identify sustainable roofing products

ANN ARBOR, Mich. — NSF International has developed an American National Standard for Sustainable Roofing Membranes - NSF/ANSI 347 Sustainability Assessment for Single Ply Roofing Membranes. Certification to NSF/ANSI 347 provides a transparent way for manufacturers of single ply roofing membranes to demonstrate their commitment to applying more sustainable approaches to product development and corporate operations, and enables them to differentiate their products in the marketplace.

NSF International, which has developed more than 75 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 utilized an 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.  The NCSS has developed sustainability standards through this consensus-based process for a wide range of product categories, including chemicals, commercial furnishings, flooring, building products and materials, and water treatment and distribution systems.

Commonly used in the green building industry, single ply roofing membranes provide a waterproofing layer in both vegetative and conventional roof systems.  The new NSF/ANSI 347 standard 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.

NSF/ANSI Sustainability assessment standards are recognized by companies, organizations and governments alike as credible tools for identifying and specifying more sustainable products.  For example, the US 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.

“As products with environmental claims continue to enter the marketplace, independent, third-party certification of products to national standards can help architects and specifiers make educated decisions about product selection,” said Dr. Ralph M. Paroli, Chair of the NSF/ANSI 347 Standard Committee. “NSF/ANSI 347 provides a standard of excellence in sustainability for the single ply roofing industry.”

“The roofing industry, as well as the overall construction industry, is transitioning to more sustainable products,” said James R. Kirby, AIA, AED, in charge of Technical Communications for the National Roofing Contractors Association.  “The NSF/ANSI 347 standard is leading the transition to more ecologically friendly roof membranes and their manufacture. Standards and products meeting those standards give professional roofing contractors real options for more sustainable products.”

How NSF/ANSI 347 Certification Works

NSF International provides certification to the new NSF/ANSI 347 standard through its NSF Sustainability division. NSF Sustainability helps companies develop standardized, objective methods of measuring sustainability that instill marketplace confidence and promote acceptance of more sustainable products and services.

Membrane products including, but not limited to, membranes produced from EPDM (Ethylene Propylene Diene Terpolymer), KEE (Ketone Ethylene Ester), PVC (Poly[Vinyl Chloride]), TPO (thermoplastic polyolefin), and PIB (Polyisobutylene) polymers are evaluated in several key categories, including:

  • 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

Certification to NSF/ANSI 347 is based on point totals to achieve a Conformant, Silver, Gold or Platinum level certification. Manufacturers certified by NSF earn the use of the NSF Sustainability Certified Mark on their products and in their advertising, and their certified products will be listed on NSF’s website.

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 organization that writes standards, 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.

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