I've got a garage access door (32" width) whose wood/aluminum sill chronically allows leakage beneath it, into the garage when it rains. I've tried all kinds of caulking, rubber seals, improved drainage, etc and nothing works - I think it was just a poor installation that needs to be ripped out.
I'm thinking of replacing it with qwikrete instead of installing another wood/aluminum sill.
Good idea, bad idea? It doesn't seem like it would be too difficult to make a form and then level it out to be flush with the existing door bottom, but I haven't tried this before and I don't want to make an annoying situation into an actual bad one.
Thanks