Why Are There Bubbles Or Blisters On My EPDM Rubber Roof?

There are multiple causes for bubbles in an installed EPDM membrane. 

If the bubbles occur around the perimeter, this is because the Contact adhesive used around the perimeter has not been allowed to tack off for long enough. Please see the video below: 

If the bubbles occur throughout the membrane then this is usually due to moisture trying to escape from the roof build up.

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