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.

The result is a series of pot marks which allow moisture to ingress and cause the covering to fail the following winter. 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. Cracks and signs of bubbling if the cracks are also showing signs of bubbling then water could possibly seep through the surface. When the roof has warmed in the sun the felt swells in the heat causing blistering on the surface.

This area can fill up with air or water to form a blister which looks like a bubble on your roof. Flat roofs often require more maintenance than pitched roofs because the water and debris don t roll off the roof as easily. There are also liquid systems for felt roofs. Vapour from contact bonding adhesive.

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. A roof blister is a raised area where there is a loss of adhesion of the roof. 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. Sweep away any loose gravel aggregate from the areas where repairs are needed.

Moisture has already penetrated under the felt. 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. Access the roof using an extension ladder. 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.