I have a ridge tile that is very heavily filled with mortar where if meets the hip. Builder is claiming it’s ok and should have a slight rise in it for weather proofing. I think it’s more than a slight rise and bad fit where the ridge or hip tile has not been cut accurately enough . Advice please as I’m told it’s fine and they will not rectify.
Thank you
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As to the problem, if the roofer had a distance of, say 62 inches of ridge tile needed to make the job look neat and the ridge tiles were 20 inches long each, tell him he shouldn't plonk
three full tiles in and then mess about with a 2 inch sliver, or dodging it full of mortar and having it look gash, he should take
four full ridge tiles and cut them all to be 15.5 inches long, then they will go the distance, and the eye won't see the 4.5 inches having been lopped off each one (unless his cutting technique is as fine as his mortaring one)
The more you want the job to look neat, the more tiles you cut to get the end one to land in the right place. The formula isn't hard:
Total distance needed, divided by length of a tile: 62/20 = 3.1
Probably this will result in a decimal number, so go to the next number up: 3.1 -> 4
Divide the distance by this new number: 62/4=15.5
That is how long the tiles need to be
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For weatherproofing it would look better and cleaner to form a lead flashing over the tiles where hip meets ridge, then fit the ridge tiles over it, hiding it. Don't mound mortar up on the lead as that could provide a route for water to bypass it.
Or use a dry ridge system, rather than sticking with what we did 100 years ago because it was the best available thing at the time