The standard applies to all major single-ply roofing formulations, including: (Polyvinyl Chloride) TPO (Thermoplastic Polyolefin) EPDM (Ethylene Propylene Diene Terpolymer) KEE (Ketone Ethylene Ester) How the Scoring System Works
: Simulate localized stress distributions under variable load frequencies.
The final category rewards forward-thinking manufacturers who go beyond the standard's baseline requirements. The innovation category provides points for advancements that drive sustainability forward, such as the development of new, less impactful materials, novel recycling processes, or unique design features that enhance environmental performance. This encourages continuous improvement and pushes the entire roofing industry toward more creative and effective solutions. nsfs 347 work
Certifying to NSF/ANSI 347 provides a transparent, verifiable way to differentiate a building in the marketplace. It allows owners to make credible claims about the environmental responsibility of their properties, which can be a significant asset for attracting environmentally conscious tenants or investors. It also provides peace of mind, knowing that their roofing material has been third-party verified for durability, performance, and long-term value.
A proper engineering workflow under NSFS 347 requires strict adherence to precise mechanical and physical properties. Performance Metric Evaluation Requirement Target Objective High-velocity axial loading tests Prevent sudden shear failure Thermal Range Cryogenic to ultra-high temperatures Maintain torque retention Corrosion Defense Continuous salt spray testing Eliminate localized pitting Implementation Workflow The standard applies to all major single-ply roofing
: Defers to extreme load-bearing and vibration environments.
Review of the manufacturer's commitment to social responsibility and transparent environmental policies. Innovation: This encourages continuous improvement and pushes the entire
Duration: 3 hours Total points: 200 Instructions: Answer all required sections. Write clearly. Where asked, show reasoning, cite any assumptions you make, and use examples or diagrams when helpful. Use concise, well-organized answers; quality of explanation and application of concepts is graded as heavily as correctness. You may use a calculator and one double-sided formula sheet.