NSF International (NSF) has developed an American National Standard for Sustainable Roofing Membranes.

NSF/ANSI 347 is titled 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.