Flat Roof Felt Bubbling

Flat roofs often require more maintenance than pitched roofs because the water and debris don t roll off the roof as easily.
Flat roof felt bubbling. There are four main reasons why blisters bubbles occur on your flat roof. I show you some of the problems with asphalt flat roofs and felt flat roofs these old roofs have blisters forming in them sometimes called bubbles because of water vapour getting trapped under. Small bubbles blisters and cracks are a common problems with felted flat roofs. If they are spotted early there is no reason why they need cause serious damage and no reason for you to replace all of the felting.
The roofer did not completely cover every square inch of the roof deck with adhesive as he re roofed. Access the roof using an extension ladder. Walk the roof and locate any raised ridges or half bulges in the roofing. A roof blister is a raised area where there is a loss of adhesion of the roof.
This area can fill up with air or water to form a blister which looks like a bubble on your roof.