and to open at the top. When inspecting these doors,
you should check the following:
The jamb opening to ensure that the hinge and
lock sides are plumb and parallel.
The doorhead to ensure that it is level.
The anchorage of the jamb and the hinges.
The lock face plates for projection beyond the
face of the door.
Settling of the foundation or shrinkage and
deflection of framing members often causes trouble at
door openings. When the greatest settlement is on the
hinge side of a door, the door will tend to become floor
bound at the lock side. When settlement is greatest on
the lock side, the door will bind at the head jamb. As
a result, the bolt in the lock will not be in alignment
with the strike plate, making it impossible to lock the
door securely. Vertical settlement and horizontal
deflection will cause the jamb opening to become out
On most wood doors the simple correction is to
plane as required at either the top or bottom for proper
clearance. When the door itself has shrunk or is
warped, swollen, or sagged, the procedures for
corrective action are as follows:
1. When a door shrinks, remove the hinge leaves
and install a filler (cardboard or metal shim) at the outer
edge of the jamb and hinge mortise. This forces the door
closer to the jamb at the lock edge; and if the hinge pins
do not bend, the door should then operate satisfactorily.
Each hinge should be shimmed equally to prevent the
door from becoming hinge bound. When the door has
swelled, place shims in the inner edge of the hinge
mortise, as shown in figure 7-6.
2. Restore a warped door to its normal shape by
removing it and laying it flat. Weighing it down may
also be necessary. If it is still warped after a reasonable
length of time, battens can be screwed to the door to
restore it to true plane. Screw eyes, rods, and
turnbuckles help straighten a door by gradually pulling
it into place.
3. Install a diagonal batten brace from the top of
the lock side to the bottom of the hinge side to repair a
sagging door permanently. The diagonal brace must
cover the joint between the rail and the stile and be
securely fastened to both members, at the top and
bottom, and other intermediate rail members.
Temporary repair can be made by installing a wire stay
brace equipped with turnbuckles and placed diagonally
in the reverse direction from a batten brace.
4. Doors or door members may require rebuilding
because of neglect or abuse. Remove the door to a flat
surface and replace the damaged member. Carpenters
clamps assist in holding door members square while
nails or screws are driven.
5. Trim the door when the preceding methods fail
to correct the trouble. However, do not cut the doors
immediately following rain or damp weather. When the
door is dry, it may fit too loosely.
Failures in PANEL DOORS are similar to those in
large wood doors. In addition, panel doors are subject
Figure 7-6.Hinge adjustment for binding or sticking doors.