A standard torsion spring replacement means unwinding the old spring under controlled tension, pulling the shaft, swapping the spring and often the bearings, then winding the new spring to the door's actual weight - not a book number. On a double door with two springs, we replace both even if only one has failed, since the second is running on the same clock. We test the door through a full cycle before we call it done: balance, travel, and reversal on the opener if one's installed. Wolf Trap has roughly 5,382 households, and a good share of the doors we see there are still running the hardware they were built with - which means the spring is rarely the only thing worth a look once we're up on the ladder.