With households in Manchester built mostly in the early '90s and after, the complaint we hear most isn't a sagging wood panel - it's an opener that grinds, reverses, or won't respond to the remote at all. That tracks with the age of the hardware: openers from that build era are now 25-30 plus years old, right in the range where capacitors fail and gears strip.
A door that drops partway and reverses is almost always a safety sensor out of alignment or a worn drive gear, not a spring problem, on houses this age. A spring that's actually gone will show as a door that won't lift at all, or one that feels twice as heavy on one side. Different symptom, different fix, and we'll tell you which one it is before we quote anything.