This article provides some guidance on whether or not to repair blistered areas on different types of conventional low-slope membrane systems.
This is a common question — and it will become more common — as roofing contractors and building owners increasingly commit to maintenance programs. The industry does not provide a concise answer to this question, though everybody appears to be in agreement that if a blister has opened it must be repaired. This is due to the probability that moisture will enter the system at these locations. The decision to repair unopened blisters has typically been left up to the judgment of the contractor. This article provides some guidance on whether or not to repair blistered areas on different types of conventional low-slope membrane systems.