[quote=Eugene]
Did you hang doors onto existing doorjambs, or did you install full packages?
Hanging the door onto the old crooked doorjamb is not too bad. But it won’t fit airtight, there may be small gaps in some places around the door.
The real fun begins if you try to hang a complete door package onto preexisting studs and it turns out that studs are 0.5° off vertical in different directions.[/quote]
They are pre-hung door, so, new doorjambs too. You can fix minor stud vertical issue by adjusting the hinge. I have 1 that was off, as you say and I put some paper between the jamb and the hinge and it works perfectly now.
