I'm looking to replace my front exterior door which is in bad shape. The jamb and threshold are bad, the slab is warped so weather stripping is ineffective, and it used to have a mortise style lock, so it's missing the "meat" around the knob.
I'm on some what of a budget, so I see that Home Depot carries Jeld-Wen steel doors in my size and with a rectangular quarter window which is a style that I like. They are $200. At the lumber yard, the door I would like--a fiberglass door with some caning in the window--is about $600.
So, in the interest of getting a door in place that is "good enough", I decided to try to go with the Jeld-Wen.
My problem is that the jamb on the Jeld-Wen is 4-9/16" which is apparently standard for a house with 1/2" drywall. My current door has a 5-1/16" jamb which is consistent with the fact that I have plaster board walls which are ~1" thick.
So my first question is:
How do I make this work? I assume I need a jamb extension? I further assume that must go on the interior side?
Next question is about the exterior:
The house has vinyl which was applied over the existing wood shingles with 3/8" thick fan-fold styrofoam in between. The existing casing was covered with brown aluminum ("coil"?). The new door will come with the typical ~1" brickmould. What is the best way to handle the exterior trim and casing? I don't mind leaving the existing brown aluminum if needed, it doesn't look great, but it does work. I'd of course prefer a more elaborate casing, but I'm not a carpenter so I'll take what I can get. I'm also nervous about cutting up the vinyl as I'll never match this color (it's 20 years old and faded).
BTW, I will not be putting a storm door back on, this door faces south and the street... heating is what damaged the existing wood door, and the street is so noisy that I'd never want to leave the door open with a screen.
I also plan to replace that board at the bottom (skirt? Or apron?) with a piece of Azek or other PVC trim so that it won't rot.
I have a few pictures which I hope will help visualize what I'm working with.