Flat Roof Felt Bubbling

Whilst bubbles or blisters on a one piece epdm roof can be unsightly they will not cause the rubber membrane to fail.

Flat roof felt bubbling.

During a warm summer flat roofs become illegal terraces and their asphalt or felt coverings are subjected to point loads just when they are most vulnerable. Walk the roof and locate any raised ridges or half bulges in the roofing. Sweep away any loose gravel aggregate from the areas where repairs are needed. 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.

These bubbles of trapped air moisture can be caused by a variety of issues which are all avoidable if the roof design is correct and the membrane is correctly installed. Small bubbles blisters and cracks are a common problems with felted flat roofs. The result is a series of pot marks which allow moisture to ingress and cause the covering to fail the following winter. When the roof has warmed in the sun the felt swells in the heat causing blistering on the surface.

Moisture has already penetrated under the felt. Water buildup combined with heat from the sun can cause shingles to. Cracks and signs of bubbling if the cracks are also showing signs of bubbling then water could possibly seep through the surface. There are also liquid systems for felt roofs.

Diy temporary flat roof repair for felt roofs this is often a paint on fix from a tin like the repair videos at the top of the page. 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. This area can fill up with air or water to form a blister which looks like a bubble on your roof. A roof blister is a raised area where there is a loss of adhesion of the roof.

Vapour from contact bonding adhesive.