Cut the old threshold in half with a circular saw being carefull not to go to
deep. Pry out the peices. Remove the staples from the bottom of the
jambs thhhhat held the threshold in place. If possible remove the
interior trim at the bottom and remove the lowest set of shims. This
will allow the jamb to move outwards to fit the new threshold in. If
removing the trim is a pain for you, you may be able to slide it in
from the outside and shim it up tight to the jamb and nail it thru the
threshold into the floor below. Either way works fine.


I'm going to have to take this thing apart. It's in concrete base,
not wood as some of you were probably thinking. It might just be a
piece of thin wood (1 x 10) with some shims and a back piece of wood
to cover up the shims. If it is then it should be real easy to
replace from the inside of the house.