Flat Roof Felt Bubbling

Small bubbles blisters and cracks are a common problems with felted flat roofs.

Flat roof felt bubbling.

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. 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. Flat roofs often require more maintenance than pitched roofs because the water and debris don t roll off the roof as easily. There are four main reasons why blisters bubbles occur on your flat roof.

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. Access the roof using an extension ladder. Sweep away any loose gravel aggregate from the areas where repairs are needed.

The roofer did not completely cover every square inch of the roof deck with adhesive as he re roofed.