Roof Bubbling Up

Cut a line through the center of the bubble with a utility knife.

Roof bubbling up.

Lift up one edge of a slit with a large screwdriver and apply roofing mastic under the ridge or bulge. 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. Roof bubbling is just what it sounds like spots where the rubber has lifted off the surface of the roof and formed a bubble or blister. In most cases bubbles in epdm roofing are just a cosmetic problem as long as they aren t growing.

The most common cause of roof bubbling is poor installation of the roof. The most common cause of bubbles is the application of rubber to the deck or insulation board too soon before the adhesive is dry enough. How to fix a bubble in a roof shingle 1. Usually bubbles are not associated with leaks.

The rv manufacturer simply didn t apply the adhesive evenly or left some dirt on the roof that the adhesive couldn t stick to. Cut slits along the high point of the ridges and bulges from end to end with a utility knife. If working on a pitched roof wear a roofing safety harness. Climb up to the roof with a ladder.

In some cases a contributing factor can be high pressure in the roof system. The line should be slightly wider than the diameter. Vapour from contact bonding adhesive.