I am getting ready to replace an exterior door and I discovered that
the fiberglass door we selected (therma-tru) is too tall for the rough
opening. (Opening = 81.75" but appears to be slanted by 0.25" so I
really only have 81.5" to work with after it's leveled; door is 82" and
they recommend an 82.5" opening.)
So I have identified the following possible solutions:
1. The door dealers told me they could cut the door down at a cost of
$67, though it sounded like taking an inch off was getting to a limit
where the standard storm door wouldn't fit.
2. I read in this group that somebody cuts the header back to make
room for therma-tru doors which tend to be taller than everybody else.
Is that a reasonable thing to do? (Wall is not structural.)
3. I could reframe the rough opening which seems like a bit of work.
4. I could lower the subfloor. As it happens, the subfloor is rotted
out and needs to be replaced anyway, so I could replace it by something
thinner right where the door is to sink the door into the floor.
(Floor is vinyl tile on top of 1/4" plywood on top of 3/4" subfloor.)
I could support this with blocking underneath.
Anything on this list reasonable?