A technician gets called out to one of these every month: a converted garage with a treadmill where the car used to go, carpet glued right up to the threshold, and a garage door that hasn't moved in two years. Sometimes it's painted shut. Sometimes there's a 2x4 wedged against the opener bracket so it 'can't open by accident.' Sometimes the springs are rusted solid and the rollers have fused to the track. The homeowner usually says some version of, 'We never use it, so I figured it didn't matter.' That's the part that trips people up — the door doesn't stop being a door just because you stopped opening it.