Can anyone tell me if broken roof tiles will cause a problem letting water in. There's one or two with hairline cracks, and one which I would consider badly broken, it's cracked the whole way through. Builder is saying hairline ones will not cause a problem and he can't remove broken one without braking others and that he'll seal it with silicone. I'm not in the habit of telling people how to do they're jobs and know nothing about roof tiles but it sounds like he couldn't be bothered doing it. Need replies on this as builder is finishing up in next couple of days and if this has to be sorted I want it done before I pay him.
sincerely, Ree