Tech Today

Reasons for ongoing concern

In July, FM Global revised its Loss Prevention Data Sheet 1-52 (FM 1-52), "Field Verification of Roof Wind Uplift Resistance," which addresses the insurance company's field wind-uplift test requirements for roof system installations in hurricane-prone regions. The July version of FM 1-52 updates and supersedes the previous April 2009 version.

The changes

Initially, the most noticeable change to FM 1-52 is its title: "Field Verification of Roof Wind Uplift Resistance." Previous versions of FM 1-52 were titled "Field Uplift Tests."

A new Table 1 has been added to the data sheet indicating whether the negative pressure test or bonded pull test methods contained in FM 1-52 apply to various roof system types.