The service area overall has housing built mostly between 1938 and 1995 with a median year of 1972, but Red Lion's own stock runs older - median year built here is 1944. That's a meaningful gap. A door installed or replaced on a house from the 1940s is more likely to be sitting on older extension-spring hardware mounted along the horizontal track, rather than the torsion setup that became standard later. Extension springs fail differently - they stretch, fatigue, and let go with a crack rather than a gradual loss of lift. Add in the cold-and-severe climate this region sits in, and metal fatigue moves faster: repeated freeze-thaw cycling stresses the coil windings every winter, and a spring already decades old doesn't have much fatigue life left to give. We see more of that failure pattern in Red Lion than we do in neighborhoods built in the 1970s and later, where torsion springs on steel shafts are more common and tend to go a different way - usually a sudden full snap rather than a slow stretch.