The bottom row of a newly installed tile wall has a gap with the shower base that is about 1/2 inch wide, too wide to caulk. How can this be filled in a way that will not crack, will make a water ...
Where my ceiling drywall meets a brick wall there is a gap. This is smaller at the brick itself (maybe 3/16") and then larger where the mortar is struck. This seems too large to fill with caulking......