Screws magically work themselves loose over the years.
How to fix door lock gap.
You can tighten a simple interior mortise lockset like the one shown at left as follows.
A visible door gap between the door and door frame.
If a door binds on the latch side at the top the upper hinge may be loose.
Remove the trim and cut the nails holding the frame to the studs.
Continue pulling until it completely.
If your door rubs near the top or drags on the floor use a screwdriver not a drill to tighten the screws.
3 if this does not help remove the knob.
Reducing door gap in a latch side hinge adjustments.
Door gap fix repair door gaps and drafty doors a door gap resulting in light under the door or peeking around the edges of the door.
Tighten the screws or repair the screw holes.
A binding door may need to be planed but often simpler repairs will solve the problem.
1 loosen the setscrew on the knob s shank.
If the hinges are fine you may need to take the door off and re square it from scratch.
Examine the weatherstripping on the bottom of the door to see if there are holes or worn areas.
With a drill you re more likely to over tighten the screw and strip the screw holes or chew up the screwheads.
2 hold the knob on the other side of the door and turn the loose knob clockwise until it fits snugly.
A drafty door with chilly drafts air blowing through your entryway.
Tighten the hinge screws.
Pull the weatherstripping toward the outer edge of the door.
If the gap along the side of your door is so large that the latch won t catch or barely catches.
In some cases a simple fix like tightening the hinges is enough.
Throw the hinges i m not talking out the window here if you don t want to cause any re decorating you can adjust a door by the hinges.
Gaps along the latch side of a door may be reduced by shimming out the hinges in some cases.
Other times the misaligned door requires a more challenging repair like shimming the hinges.
Then re nail the door stops on leaving a 1 2mm gap all the way around to allow for paint fix them tighter if no decorating needs doing afterward.
If it binds on the latch side at the bottom you may need to fix the bottom hinge screws.
Water leaking from the top of the door frame.