Are you talking about inset doors?
One method, of many:
Requirement: Perfectly,.as possible, "square" face frame.
Requirement: Perfectly, as possible, "flat" stock for the doors rails and
stiles, so the door has NO warp.
If the door is warped, do something to get rid of it ... the warp, or the
door. If the FF is warped ... well.
Of course, you have previously made the door oversize in both dimensions ...
about 3/32" wider and taller than the door opening ... you want to end up
with about a 1/16" gap, all around, between the door and the face frame of a
single, inset door in a cabinet.
I generally start by placing a bottom and top side, usually the bottom rail
and hinge side stile, in the door opening.
Then start your choice of planing, cutting, jointing, sanding, on the top
rail and opposite stile for a TIGHT fit of the door in the opening.
You got a choice of methods. If you're real good with a plane, you may find
that an option. I generally use my stationary belt sander as there is
generally less damage/chipout when sanding, and I often use the jointer now
that I own a good one. A well set up table saw with a good blade is an
option. Sanding is probably better if you've never done it before.
Once you get the top and hinge side reduced to where the door will go JUST
go in the opening with NO room to spare, pull the door out and make a mark
1/8" across the top rail and opposite stile.
Plane, cut, joint, sand, to this line ... but sneak, sneak, sneak up on
those lines like Boudreaux sneaks up on dem ducks!
Check the fit often ... and pray to your god/goddess of choice as
Use double-sided carpet tape to tape a strip to the bottom and one
side of the door [assuming it is built to fit with the space allowance
you want ...1/16]. Perhaps tape a temporary door stop to the frame
to hold from going too far inward. Hold snug. Mark and fasten
hinges. Remove strips.
Just 'tack' the strips, full length not necessary.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.