A few days ago, the National Sanitation Foundation (National Sanitation Foundation,NSF) formulated the first green evaluation standard for single-layer roofing coils for commercial buildings-NSF/ANSI 347, the sustainability evaluation standard for single-layer roofing waterproofing coils. The standard is one of eight building product standards developed by NSF, and is the first product standard for building peripheral structures.

The National Sanitation Foundation (National Sanitation Foundation,NSF) was founded in 1944 as an independent, not-for-profit, non-governmental organization. NSF specializes in standard-setting, product testing and certification services in the fields of public health, safety and environmental protection, and is an authoritative organization in the field of public health and safety. The purpose of NSF is to develop and implement management plans for public health and the service, research and educational environment. As a reliable and neutral organization, NSF provides services to government, industry and consumers on issues related to public health and the environment.

NSF's technical resources include test equipment and analytical chemistry and microbiology laboratories. NSF's professionals include engineers, chemists, toxicologists, public health scientists, and computer scientists with extensive experience in public health, food safety, water quality, and the environment. Certifications issued by NSF are recognized by the American National Standards Institute (ANSI) and the Standards Council of Canada (SCC).

The sustainability assessment standard for single-layer roof waterproofing membrane is considered from the production to application. Waterproofing membrane is divided into standard, silver, gold and platinum products (Conformant, Silver, Gold, or Platinum). The evaluation criteria are based on the following four aspects: environmental protection considerations in product design; reduction of environmental pollution and impact in product production; durability and repairability of coils; and business management. The standard also takes into account the factors of reusing resources, biological substrates and reducing the use of chemical products.