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Informational Bulletin No. 2014-5

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Description

The information provided in this Informational Bulletin is preliminary and based on a limited number of reports from Owners or their insurance adjuster and WSRCA member Contractors. So all involved and/or concerned may be aware, these initial reports are not pointing to a particular fault or deficiency of the roof membrane, on the contrary, the roofs are reported as thought to be well formulated.

Initially, post-hail storm damage has been discovered on reinforced ketone ethylene ester (KEE) single-ply membrane roofs. However, because of the potential for inaccurate roof damage assessment particularly after all the recent hail events so far this year, WSRCA believes it prudent to apprise its members of that which we have recently learned. Although, WSRCA’s LowSlope Committee is cautious that other resilient thermoplastic single-ply membranes (e.g., PVC and/or copolymer blends, etc.) could potentially be vulnerable to this phenomenon as well, and as such, WSRCA suggests this genre of thermoplastic roofing membranes be thoroughly surveyed or closely checked and examined for damage after a hail storm. 

WSRCA believes that undetected, latent-hail damage of roofing membranes could potentially have a detrimental (e.g., financial, or leakage later, or other) impact on building owners and roofing contractors in areas of the country that experience hail events. As such, WSRCA’s Low-slope Roofing Committee has decided it prudent to release this preliminary information for your review. Additionally, WSRCA desires to prompt reports of any additional occurrences so WSRCA’s Technical Advisory Section may potentially conduct laboratory analysis of roofs displaying latent-hail damage, so that additional information may be learned and if appropriate disseminated to the low-slope roofing community.