Understanding ANSI/SPRI ES-1

Code requirements for ANSI/SPRI ES-1 often are misunderstood

In 1998, SPRI published its first edition of ANSI/SPRI ES-1, "Wind Design Standard for Edge Systems Used With Low Slope Roofing Systems." With the incorporation of ANSI/SPRI ES-1 into the International Building Code, 2003 Edition (IBC 2003), compliance with ANSI/SPRI ES-1 became a building code requirement.

Although ANSI/SPRI ES-1 has existed for more than 10 years and been a building code requirement for more than five years, based on questions received by NRCA's Technical Services Section, ANSI/SPRI ES-1 still does not appear to be widely understood. Also, a certain amount of misinformation regarding ANSI/SPRI ES-1 and its implementation has been circulating in the U.S. roofing industry, which further complicates proper understanding.

If you are involved with the design or fabrication of metal roof edge flashings or the design or installation of low-slope membrane roof systems, you need to know about ANSI/SPRI ES-1.