Chandler sits in a severe-heat climate band, and most of the housing stock in this service area went up between 1985 and 1993, with a median build year of 1991. That matters because garage doors from that era were built to the standards of their time, which did not require the insulation values that later codes demanded. A single-skin steel door with no foam core does almost nothing to block summer heat, and in a garage that regularly sits well above outdoor temperature, that heat soaks into the slab, the ceiling joists above, and anything stored against the shared wall. Repeated heat cycling also does something specific to these older doors: it dries out the factory lubricant in the hinges and rollers faster than a newer, better-sealed unit, and it can warp thin steel panels enough that they stop sitting flush in the track. If your house is one of the many in this area built in that 1985-1993 window, your door has likely been through close to three decades of this cycle without ever being upgraded.