Fix Door Rubbing Against Floor

This is seen as a gap that is wider at bottom than at top or vice versa.
Fix door rubbing against floor. Squirt some pva wood glue in to the screw holes first then bang in as many match sticks as will fit. These problems can be solved by careful cutting sanding or planing of the offending door. Tighten the hinge screws screws magically work themselves loose over the years. Repair of doors rubbing on the door jamb frame floor or carpeting are a staple of home repair.
The solution to this is to push the door outward from the lower hinge therefore squaring it up and stopping the sagging. Alternatively plug the screw holes with a rawl plug or lots of matchsticks. If the bottom of your door below where the lock and door handle are located is hitting or rubbing the bottom of the door frame then you need to add a cardboard shim to the very bottom and possibly the middle hinge also. With a drill you re more likely to over tighten the screw and strip the screw holes or chew up the screwheads.
Take one of the doors down by lifting it and angling the bottom toward you until the rollers clear the top track then pulling it toward you. Inspect the rollers and tighten them with a. If you can t get them to bite remove screw and fill hole with glue and a matchstick then drive in screw again. First check all screws holding hinges are secure.
To adjust a door in this instance i either use better longer wood screws and try to fix deeper through the frame into the timber stud behind that the frame is fixed to. If your door rubs near the top or drags on the floor use a screwdriver not a drill to tighten the screws. Always trim doors conservatively they don t heal.