Exterior door details with 4″ thick foam walls
I’ve read plenty of articles on Dudley boxes and setting innie and outie windows, but doors are a whole different animal mainly due to the swing and bottom. The sides and top are basically the same details as a window to my understanding. It may be possible there is a manufacturer that makes door settings this wide that are affordable? The wood on all of the original doors is rotting because they were set 3″ off the finished grade and got wet always. The foam will be 4″ in areas and the walls are either 2×4 or 2×6 depending on the area of the house.
Some of my questions and concerns are:
-How do I build the build the box for the bottom of the door? The door currently sits directly on a slab and there is also 4″ of insulation beneath the door for the exterior of the foundation (it’s only insulated due to radiant flooring with no insulation on the inside). Should I use a steel plate and raise the door? The door sits directly on a concrete slab.
-Can I notch the king studs and header 3/4″ to allow for the same sized door or window to fit in the original rough out?
As always, any and all help is much appreciated!