See title. Is it the spring lifting one side off the ground or is it something else like the cable on that side? Thanks for any advice!
Edit: From what I can tell the door and the floor are both slightly off level in opposite directions. I also just replaced the bottom seal in an attempt to fix this.
If you check the level of both the door and the slab it will let you know which one is causing the gap. I would guess that a gasket would be the best fix. If it is the door DO NOT try to fix it yourself. Those springs can very easily kill you. I have known life long contractors that will do everything in a house but a garage door. Garage doors are not DIY.