Title
Understanding FM Approvals’ metal edge testing approval
Understanding FM Approvals’ metal edge testing approval
Date
11/2018
11/2018
Author(s)
Mark Graham
Mark Graham
Page(s)
26-31
26-31
Keyword(s)
consensus; FM 4435; low; slope; membrane; metal; flashing
consensus; FM 4435; low; slope; membrane; metal; flashing
Abstract
Based on calls being received by NRCA’s Technical Services Section, there appears to be confusion in the roofing industry regarding FM 4435, “Approval Standard for Edge Systems Used with Low Slope Roofing Systems,” FM Approvals’ criteria for metal edge testing. Perhaps the confusion lies with the FM 4435 designation also being included in the title of the U.S. national consensus standard for metal edge flashings. Also, there appears to be some lack of understanding by specifiers regarding how they should properly implement FM 4435. Following is a brief explanation to provide some clarity.
Based on calls being received by NRCA’s Technical Services Section, there appears to be confusion in the roofing industry regarding FM 4435, “Approval Standard for Edge Systems Used with Low Slope Roofing Systems,” FM Approvals’ criteria for metal edge testing. Perhaps the confusion lies with the FM 4435 designation also being included in the title of the U.S. national consensus standard for metal edge flashings. Also, there appears to be some lack of understanding by specifiers regarding how they should properly implement FM 4435. Following is a brief explanation to provide some clarity.