Flat Roof Blisters

The blister is in an area that receives foot traffic.

Flat roof blisters.

Membrane systems are most susceptible to blistering because blisters are formed by voids between the plies or at the point between the substrate and the membrane. This flat roofing type is ideal for roofs with high amounts of foot traffic or if the roof is often hit by airborne debris. The blister is near enough to the seam that it may cause the seam to open up. Left alone it might take several yeas for the.

A single blister on a seam. Water somehow got under the roof coating and couldn t get back out. It expanded as vapor and made this blister. Blisters can develop from voids which are essentially bubbles caused by uneven bitumen application trapped debris or gases from trapped moisture.

To repair a blister cut away the membrane until you reach an area where the membrane still adheres to the roof tightly. Causes of blisters all conventional low slope roof systems experience blisters in some form. Causes of roofing blisters may vary and for arizona residents with flat roofs and annual storms knowing how to fix blisters ways for preventing roof blisters on flat roofing and why roof blisters happen is an important part of regular roof maintenance that keeps their homes protected in this harsh climate. Some are not so bad and others show a roof that needs quite a bit more work.

Roof blisters are not limited to one type of roof system. Shown below are a multiple photos of flat roof or cool coated roof blisters. While roof blisters may not need immediate attention if left unmonitored they could lead to saturated insulation and a damaged membrane.