I started replacing my exterior utility room door (builder's original 1975
door) with a new, pre-hung insulated door.
The area is slab on grade, but for some reason the builder notched out the slab
for the depth of slightly more than a 2x4 laid on the flat under the door
In addition, the builder used a rough opening for a 34" door, but installed a
My simple 2-3 hour changeout-a-door replacement project just turned into
I can understand a 2'' difference in door thickness, but what's with the
notching of the slab? Was this a common practice? It was obviously done by hand
and wasn't at all necessary, since the 2 x 4 simply built the threshold back up
to where it would have been - slab level. At this point I've hung the door
(with screws) but haven't sealed it in. Wondering If I should get a cca
pressure treated 2x4 and duplicate the builder's method, or get a couple bags
of quickcrete and repair the slab first.