Whether your garage door operates with an extension or torsion system, you can lubricate the spring system by applying lubricant (5W30 motor oil works well) to all metal parts. To apply the lubricant or oil, drip or spray it on the top of the spring. Sep 9, 2016
If the quality of the floor cannot be fixed, consider a u-shaped bottom weatherstrip, which can adjust to an uneven surface to create a seal. Another option to consider if the floor is uneven is a garage door seal strip. These can be purchased and applied to the floor to help fill in areas of unevenness.