To keep water from entering the basement from the stairwell (which has a drain in it), a masonry sill was constructed that rises about 2-1/2 to 3 inches above the concrete floor.
Over time, it has deteriorated and now is about to fall apart. I need to replace the door, anyway, with a more energy efficient one.
I need to replace the sill. How to I do it? Or do I need to hire a masonry contractor to do the job?