Original spring sizing
Housing in this service area went up mostly between 1938 and 2009, with the median build year sitting around 1977, and a lot of that stock is 1960s and '70s construction. That means original torsion springs sized for a lighter door, steel tracks that were never leveled for today's heavier insulated panels, and openers bolted to framing that's shifted a little over fifty-plus years.
