When you open the door, it rolls along a track and bends at the hinges that connect the panels. A tilt-up garage door is one large panel with a sturdy internal frame instead of several panels.

If you guessed a garage door ... rollers and the door opener. Twice a year, apply a spray lubricant on the rollers and hinges, then wipe off excess. "Dust collects and builds up on parts, creating ...