Nsfs 347 2021 ^new^ Page

NSF/ANSI 347-2021 is the gold standard for verifying the sustainability of single-ply roofing membranes. This 2021 update ensures that environmental claims are backed by rigorous, multi-attribute data. Why the 2021 Update Matters

The NSF/ANSI 347 Sustainability Assessment provides a clear framework for specifiers to identify high-performing, eco-friendly products.

Transparency: Uses a points-based system for objective comparison.

Third-Party Verification: Moves beyond self-claims to independent certification.

LEED Credits: Products certified under this standard help earn points toward LEED certification. 5 Critical Performance Categories

To earn certification, manufacturers like Duro-Last and Sika are evaluated across five key areas:

Product Design: Evaluates raw material extraction and environmentally responsible choices.

Product Manufacturing: Focuses on energy efficiency and waste reduction during production.

Membrane Durability: Tests long-term performance across different climate zones.

Corporate Governance: Requires public commitment to ethical labor and environmental policies.

Innovation: Rewards manufacturers for pushing the boundaries of sustainable technology. Understanding the Tiers

Certifications are awarded based on a total point score, allowing for clear differentiation: Sika Achieves Platinum Certification Again for NSF/ANSI 347

Understanding NSF/ANSI 347-2021: The Gold Standard for Sustainable Roofing

The commercial construction industry has shifted from making unverified "green" claims toward a rigorous, data-backed approach to environmental stewardship. At the center of this evolution for the building envelope is NSF/ANSI 347-2021, a comprehensive sustainability assessment specifically designed for single-ply roofing membranes.

This multi-attribute standard provides architects, specifiers, and building owners with a transparent framework to evaluate the entire life cycle of roofing products, from raw material extraction to end-of-life management. What is NSF/ANSI 347?

Developed through an ANSI-accredited consensus process involving manufacturers, government agencies, and environmental NGOs, NSF/ANSI 347 is the first standard of its kind for the building envelope. It covers common single-ply materials including: PVC (Polyvinyl Chloride) TPO (Thermoplastic Polyolefin) EPDM (Ethylene Propylene Diene Terpolymer) KEE (Ketone Ethylene Ester) The Five Pillars of Assessment nsfs 347 2021

To earn certification, roofing membranes are evaluated across five key performance areas, with a total of 123 possible points:

NSF/ANSI 347: The Architect's Guide to Specifying ... - Duro-Last

NSF/ANSI 347-2021 standard represents a critical milestone in the construction industry’s shift toward sustainable infrastructure. Specifically focused on Sustainability Assessment for Single-Ply Roofing Membranes

, this standard provides a rigorous, third-party verified framework for evaluating the environmental performance of roofing materials like PVC, TPO, EPDM, and KEE throughout their entire life cycle. The Evolution of Sustainable Roofing

For decades, roofing was viewed primarily through the lens of durability and cost. However, as the global building sector accounts for a massive portion of carbon emissions, the focus has shifted toward materials that minimize environmental impact without sacrificing performance. The NSF/ANSI 347 standard (accessible via NSF International

) was developed to give architects, specifiers, and building owners a reliable way to distinguish truly sustainable products from those making unsubstantiated "green" claims. Core Evaluation Criteria

The 2021 update of the standard utilizes a point-based system to award certification levels ranging from . It evaluates products across five key performance areas: Product Design:

Encouraging the use of recycled content and the reduction of hazardous chemicals during the formulation phase. Product Manufacturing:

Monitoring the environmental footprint of the production facility, including energy efficiency, water conservation, and waste diversion. Membrane Durability:

Ensuring that sustainable membranes still meet high-performance standards for longevity, as a longer-lasting roof is inherently more sustainable. Corporate Governance:

Assessing the manufacturer's commitment to social responsibility and transparent environmental reporting. End-of-Life Management:

Incentivizing "take-back" programs and recycling initiatives to prevent old roofing membranes from ending up in landfills. Industry Impact and Transparency

The significance of NSF/ANSI 347-2021 lies in its ability to provide transparency

. By using a consensus-based approach involving manufacturers, end-users, and regulatory agencies, the standard creates a level playing field. According to the Green Building Initiative

, such standards are vital for earning credits in green building rating systems like Green Globes NSF/ANSI 347-2021 is the gold standard for verifying

In conclusion, NSF/ANSI 347-2021 is more than just a technical checklist; it is a roadmap for the future of the building envelope. By prioritizing life-cycle thinking, it ensures that the "top" of our buildings contributes to a healthier planet below. for manufacturers or its role in LEED certification

It is possible that:

• The number is a typo or internal reference number (e.g., from a company, university, or local code).
• It refers to a non-public or very niche specification.
• You meant a different standard (e.g., NSF/ANSI 347 – which does exist, on sustainability for single-use food service items).

To provide you with a helpful and accurate blog post, I will assume you meant NSF/ANSI 347: Sustainability for Single-Use Food Service Items (2021 edition) , as that is the closest active standard.

Below is a complete, ready-to-publish blog post based on that assumption.

Why 2021 Matters: Key Updates

The 2021 revision tightened several sections:

1. Biodegradability & Compostability – Aligns more closely with ASTM D6400 and D6868 for industrial composting.
2. Minimum recycled content – Raised thresholds for plastic and paper-based items.
3. Toxicity screening – Expanded list of restricted substances (PFAS, heavy metals, phthalates).
4. Chain of custody – Requires documentation for certified bio-based or recycled materials.

If a product was certified under an earlier version, manufacturers had until mid-2023 to recertify to the 2021 criteria.

2. Physical & Mechanical Properties

• Tensile strength – Minimum 6.9 MPa (1000 psi) for most elastomers.
• Compression set – ≤ 25% after 22 hours at 125°C.
• Hardness – Shore A must be within ±5 points of manufacturer claim.
• Creep relaxation – ≤ 20% torque loss after 1000 hours at 80°C under constant strain.

Understanding NSFS 347 2021: A Comprehensive Guide to the Standard for Nonmetallic Gaskets

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.

Advancing STEM Education

One critical area of focus for the NSF is the advancement of STEM (Science, Technology, Engineering, and Mathematics) education. NSF initiatives often aim to improve the quality of STEM education at all levels, from K-12 through graduate school, and to increase diversity and inclusion within STEM fields. For instance, programs that support research on STEM education and those that provide resources and support to underrepresented groups in STEM are crucial for developing a diverse and skilled future workforce.

1. Executive Summary

NSFS 347-2021 establishes the minimum requirements for mechanical couplings used to join thermoplastic pressure piping systems. This includes pipes made from materials such as PVC, CPVC, PE, and PP. The standard is critical for ensuring the safety, reliability, and performance of alternative joining methods to traditional solvent cementing or heat fusion. It covers material requirements, design criteria, performance testing, and marking requirements.

5. Conclusion

NSFS 347-2021 serves as the benchmark for mechanical joining technology in the thermoplastic piping sector. By enforcing strict material and performance guidelines, the standard protects public health and safety while supporting innovation in plumbing system installation. Manufacturers seeking to market mechanical couplings in North America generally require certification to this standard.

Note: If you intended to reference a different document (e.g., a typo for a NASA report or NFPA code), please clarify the acronyms, as "NSFS 347" is predominantly recognized in the plumbing/piping industry.

The 2021 date likely corresponds to the updated publishing cycle of this standard, which provides a comprehensive framework for manufacturers to verify their environmental claims. Core Framework of NSF/ANSI 347

The standard evaluates roofing membranes using a point-based system across five critical categories, totaling a maximum of 123 points:

Product Design (42 points): Focuses on the use of environmentally responsible materials and the overall recyclability of the membrane.

Product Manufacturing (27 points): Evaluates operational efficiency, including energy conservation, waste minimization, and water usage. The number is a typo or internal reference number (e

Membrane Durability (40 points): Measures long-term performance in various climate zones, emphasizing that a longer-lasting roof reduces overall environmental impact.

Corporate Governance (7 points): Assesses the manufacturer's commitment to social responsibility, public environmental policies, and transparency.

Innovation (7 points): Rewards manufacturers for implementing new technologies or reclamation processes that exceed current standard requirements. Certification Levels

Products are awarded one of four tiered ratings based on their total point score: Compliant: Minimum 35 points Silver: Minimum 45 points Gold: Minimum 56 points

Platinum: Minimum 75 points (The highest level, recently achieved by Sika's Sarnafil membranes in late 2025). Benefits for Professionals

Architects & Specifiers: Use the standard to ensure the accuracy of sustainability claims and to meet LEED certification requirements.

Building Owners: Gain verifiable metrics to support corporate environmental goals while ensuring long-term roof performance.

Manufacturers: Differentiate brands in a crowded marketplace and align with federal or state procurement guidelines.

The NSF/ANSI 347 standard provides a rigorous framework for architects, specifiers, and building owners to identify roofing products with reduced environmental impacts. The 2021 version represents the latest consensus-based updates from the NSF Joint Committee on Sustainable Single Ply Roofing . Key Evaluation Criteria

Products are assessed based on their performance across five major categories:

Product Design: Encourages the use of sustainable materials and design for longevity.

Product Manufacturing: Measures operational efficiency, including water use, energy consumption, and waste management.

Membrane Durability: Focuses on the service life and resilience of the roofing system.

Corporate Governance: Evaluates the manufacturer's commitment to social responsibility and ethical practices.

End-of-Life Management: Specifically incentivizes the recycling of post-consumer roofing materials to divert them from landfills. Certification Levels

Roofing membranes, such as those from manufacturers like Duro-Last , earn points based on their adherence to these criteria. They are then awarded one of four certification levels: Certified Silver Gold (e.g., the white Duro-Last membrane) Platinum Importance in Sustainable Building Ralph M. Paroli - Standards Council of Canada