Interior doors are often hollow with only 1 inch 2 54 cm of wood to stabilize the door.
Door suddenly dragging on floor.
Houses settle over time which often causes a door to sag inside its frame.
Apart and run the point along the jamb.
A dragging corner makes a door difficult to open and close.
Use a screwdriver to tighten the screws in the top hinge on the door and frame.
Be careful not to cut the door too deep or too far.
Plane the door with a belt sander.
The dragging door corner can scrape the floor or threshold.
Over time these screws can work their way loose causing the bottom of the door to drag on the floor.
Set the pencil tip and compass point 1 8 in.
First run a piece of paper at the bottom of door to identify where is sticky.
Masking tape makes the pencil line easy to see.
If your door is a solid wood door you have more leeway in regards to how much wood you can remove.