Eric and Megan Swope wrote:
Hi everyone. I am putting a prehund door into the rough opening. I
want to
make sure my door is not twisted in the rough opening. When I say
twisted,
I mean that one door jamb doesn't stick out further than the other.
Is
there a special tool to check for this. I will draw a picture below,
using
J for the door jambs and l for the level. However I don't think this
is how
to check this. Any help is greatly appreciated. Thanks.


J J
J J
JLLLLJ
J J
J J

I see a several posts trying to re-invent the wheel. The answer, since
it is a pre-hung door, is to tack the hinge jamb, shut the door and
when it is tight to the stops on all three sides the door is in plane.
Tack the other two sides after adjusting them so the gap between door
and jamb is the same all the way around. Simple. The problem comes
when the wall is not plumb. You may not be able to have the jambs in
plane if the wall is far enough out of plumb. There are tricks to fix
that (planeing the jamb, planeing the wall, installing off plumb and
moving stops etc.).

Harry K