If rainwater is being held back due to the join causing a ridge,is it acceptable for rainwater to stay there to the extent whats left behind is touching the end of the tiles?
My belief is the whole purpose of a gutter is to catch rainwater and disperse it via the nearest downspout ie no water should be left behind providing the gutter is clear of debris or moss.
She's getting her relative on the case but I would like to know whats acceptable and what isn't? roofers are saying its acceptable.
Cheers