What is required for FM Approval regarding wind uplift?

What is required for FM Approval regarding wind uplift?

• A. Color matching
• B. Specific uplift resistance ratings (e.g., 1-60, 1-90 for psf)
• C. Brand reputation
• D. Installation cost

Answer: (B)

Wind uplift performance is what FM Approval hinges on. The essential requirement is a verified uplift resistance rating for the roofing assembly, expressed in pounds per square foot. This rating shows how much upward load the product and its installed system can withstand before failure, and it comes from standardized testing and evaluation within FM’s criteria. The numbers, such as 60 psf or 90 psf, convey the uplift capacity and help determine where the product can be used based on the wind conditions of the project location and the specific roof details. Other factors like color matching, brand reputation, or installation cost do not reflect wind uplift performance, so they aren’t criteria for FM wind uplift approval. The rating reflects performance of the complete system, including fasteners and accessories, not just the material itself.

Wind uplift performance is what FM Approval hinges on. The essential requirement is a verified uplift resistance rating for the roofing assembly, expressed in pounds per square foot. This rating shows how much upward load the product and its installed system can withstand before failure, and it comes from standardized testing and evaluation within FM’s criteria. The numbers, such as 60 psf or 90 psf, convey the uplift capacity and help determine where the product can be used based on the wind conditions of the project location and the specific roof details.

Other factors like color matching, brand reputation, or installation cost do not reflect wind uplift performance, so they aren’t criteria for FM wind uplift approval. The rating reflects performance of the complete system, including fasteners and accessories, not just the material itself.