Vapour from contact bonding adhesive.
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.
Spread roofing cement inside the.
In most cases bubbles in epdm roofing are just a cosmetic problem as long as they aren t growing.
In some cases a contributing factor can be high pressure in the roof system.
Cut a line through the center of the bubble with a utility knife.
Cut slits along the high point of the ridges and bulges from end to end with a utility knife.
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.
A roofer joseph bublick responds.
The most common cause of roof bubbling is poor installation of the roof.
Climb up to the roof with a ladder.
If working on a pitched roof wear a roofing safety harness.
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.
The line should be slightly wider than the diameter.
Whilst bubbles or blisters on a one piece epdm roof can be unsightly they will not cause the rubber membrane to fail.