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SPRI announces plans to revise design standard for edge systems

RCS Welcomes SPRI 600x300 Logo
March 27, 2025 at 1:00 p.m.

SPRI ED-1 “Design Standard for Edge Systems Used with Low-Slope Roofing Systems” is being revised and will be re-canvassed for approval as an American National Standard.

SPRI, the association representing sheet membrane and component suppliers to the commercial roofing industry, announced that SPRI ED-1 “Design Standard for Edge Systems Used with Low-Slope Roofing Systems” is being revised and will be re-canvassed for approval as an American National Standard.

This Standard provides the basic requirements for wind load design for roof edge securement of roof edge systems, including gutters and nailers. It also provides information on material thicknesses that lead to satisfactory flatness, accommodating thermal movement, how to minimize corrosion, methods for testing roof edge systems, and other factors affecting roof edge performance. This Standard applies to roof edge systems for low slope membrane roof systems, with low slope defined here as roofs having a slope < 9.5 degrees (2:12).  

The ED-1 Standard was first approved as an ANSI standard in 2019. It was developed using the design requirements of the ANSI/SPRI/FM 4435/ES-1 and ANSI/SPRI GD-1 to create a new design standard, ED-1. This standard is now undergoing its regular review as required by SPRI’s ANSI procedures.  

Those wishing to participate in the canvass process may contact SPRI at info@spri.org.

Learn more about SPRI in their Coffee Shop Directory or visit www.spri.org.

About Single Ply Roofing Industry (SPRI)

SPRI is a trade association comprised of commercial roofing industry experts dedicated to providing an open forum for discussion, education and innovation. It is the leading authority in single-ply roofing and provides ongoing resources and expertise for contractors, architects, building owners and code officials. For more information on SPRI or to become a member, please visit our website at www.SPRI.org.



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