Horizontal bubbles in roofing felt

14 May 2007
Reaction score
United Kingdom
A contractor has just laid a warm roof felt roof on my extension. I have noticed horizontal bubbles in top layer of roofing felt across the majority of the new roof. There was a delay in applying the final layer of roofing felt of 2-3 weeks due to bad weather. The final layer has been in place for about 5 weeks.

Please clarify if this is a defect and if so, whether it can be satisfactorily remedied without removal of the new felt roof, or whether the contractor should relay the whole roof.

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Firstly did you get given a guarantee?
should be a minimum of ten years for a properly laid flat roof, and also did you notice if the roof had been dried off properly before the final layer being torched on? If it was still wet then this will have caused the bitumen to bubble up, and this will eventually split in no time at all with the summer coming up. Call the guy back asap, it needs re-laying by the sounds of it. Can you post a good picture on here? The problem cant be remedied unless you're prepared to have your new roof cut and repaired with patches all over- but this isnt acceptable for a new roof. Get the bloke back in.

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