Does your door scrape against a high spot on the floor? When a door swings over uneven terrain and clips the high ground, let gravity, solve your problem. Tape a sheet of medium-grit sandpaper to the floor on the high spot face up, so it sands the bottom of the door when contact occurs. After a while, it’ll wear the door's bottom edge down. Once it clears the bottom, start building it up again adding thin cardboard under the sandpaper until the clearance is just right. And that’s the On The House tip for today.