Question: How many turns do I need to wind the new spring(s) Answer: I full turn per ft of door height plus a 12 turn. A 7' high door would adjust to 7 12 full turns or 30 quarter turns. Installation Video:PLEASE NOTE, Any variation of your actual spring dimensions will alter counterbalance and affect the overall life of the replacement spring. Here are the instructions on how to measure your existing spring. If you need help, contact customer support at 1-800-829-6002