May 7, 20215 yr Had this small brown water mark at the ceiling wall junction for about 6 months, it's not got worse since and is about 7cm X 1cm. Took some photos today of the top of the flat roof and only think I can see is this...(photo attached) This mark is about 1 meter away from the mark. Does this look like a hole? I'm not convinced the mark goes all the way through the rubber but can't get better access as it's a 3 story house.
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