I have a bunch of doorways to make jambs and casing for. These are not going to have actual doors hung, just trimmed out. These are standard 2x4 framed walls with finished gypsum board surfaces.
I'm sure there will be some irregularity in the wall thickness at these doorway openings and surface variations. What's a good guideline for what measurement to use for the jambs?
(Assume that the walls are as sanded flat as they're going to get.)
Large: Use the maximum thickness from all the way around the opening. May have to caulk/fill between casing & walls.
Medium: Subtract the relief at the back of the casing from the max measurement
Small: Use a measurement of minimal wall thickness, and caulk between the casing & jambs
These are just preliminary thoughts... other options welcome!
I suspect that caulk would be less noticeable in option 1 than 3. Option 2 probably requires caulking both sides of the casing. (Maybe that is inevitable).
This will be painted so the caulk or filler itself is not a problem in that sense.