1958 extension-spring inventory stocking
Across the wider service area, houses run newer on average - median year built lands around 1967 - but Nitro's stock is older, centered on 1958. That ten-year gap matters more than it sounds like it should. Doors and openers installed on houses built through the 1950s and early 1960s were often retrofitted later with extension-spring setups rather than the torsion systems that came standard once builders started installing garage doors at construction instead of adding them after.
