Across the service area, houses went up between 1938 and 2005, with the median build year landing in 1977. That one number tells you a lot about what breaks. A 1962 ranch has a different door opening, different header framing, and usually a different spring setup than a house finished in the 1990s. Most of what we see falls into the 1960s-70s window, spread across 34 named areas rather than one tract built by one developer, so the fixes vary block to block even within a few miles of each other.
The climate band here is classified cold and severe, which matters more than people think. Torsion springs lose temper faster in hard freeze-thaw cycles, nylon rollers crack, and steel tracks pull loose from framing that's shifted over fifty-plus winters. Older one-piece doors on side-mounted hardware are the parts nobody stocks anymore, while homes from the 80s and later usually run extension or torsion systems that are easier to source.