Rewards the use of environmentally preferred materials, non-hazardous ingredients, and optimized raw material extraction.

: Products can achieve different levels of certification (e.g., Bronze, Silver, Gold, Platinum) based on their point scores in specific categories. Evaluation Categories

The strength of NSF/ANSI 347 lies in its holistic, multi-attribute approach. The standard doesn't look at a single factor, such as recycled content, but evaluates the entire product ecosystem. The assessment is broken down into five primary categories:

To achieve certification, products are evaluated based on a 123-point system across five core categories:

The standard applies to various single-ply roofing membrane types, including EPDM (Ethylene Propylene Diene Terpolymer), KEE (Ketone Ethylene Ester), PVC (Poly Vinyl Chloride), TPO (Thermoplastic Polyolefin), and PIB (Polyisobutylene).

The 2021 revision tightened several sections:

: Sustainable sourcing practices of baseline polymers and chemical compounds.

The standard applies to various single-ply membrane types, including: (Ethylene Propylene Diene Terpolymer) PVC (Polyvinyl Chloride) TPO (Thermoplastic Polyolefin) KEE (Ketone Ethylene Ester) 2. Five Pillars of Assessment

, such standards are vital for earning credits in green building rating systems like Green Globes

This category rewards manufacturers who introduce forward-thinking technologies or processes that exceed the baseline requirements of the standard. Examples include pioneering advanced closed-loop roof recycling programs or engineering breakthrough material configurations that drastically reduce carbon footprints. Levels of Certification

In the world of industrial components, few documents are as critical yet as misunderstood as the NSFS 347 2021 standard. For engineers, procurement specialists, and compliance officers working with fluid handling systems, this standard represents a cornerstone of safety and material reliability. This article breaks down everything you need to know about NSFS 347 2021—its scope, requirements, testing protocols, and why the 2021 revision matters more than ever.

A roof cannot be sustainable if it must be replaced every decade. This section assesses the physical properties, projected service life, and ease of repairability of the membrane. High-performing membranes that maximize building energy efficiency (such as highly reflective "cool roofs" that combat the urban heat island effect) score highly here. 4. Corporate Governance

Awards points for implementing new, quantifiable ideas that provide environmental benefits beyond the standard's basic requirements. Building Enclosure Certification Levels

For professionals, choosing NSF/ANSI 347-certified roofing offers several key advantages: Enhanced Sustainability Claims

As building codes place a heavier emphasis on decarbonization, this comprehensive framework allows architects, designers, and structural engineers to confidently specify roofing materials that back up their green claims with rigorous, third-party verified data. Key Pillars of the NSF/ANSI 347 Framework

By evaluating the entire product life cycle, the standard prevents "greenwashing" and ensures that an improvement in one environmental area does not inadvertently cause a negative impact elsewhere. 2. The Five Core Pillars of Evaluation

The standard explicitly metallic gaskets (e.g., spiral wound, ring joint) and gaskets used outside of water/wastewater infrastructure (e.g., chemical plants, oil & gas).

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