Most of Bartlett's housing stock went up between 1972 and 2005, with the median build year landing around 1998. That's a long run of tract construction, and across the ten subdivisions and nearby areas we work - Daybreak, Bartlett Corporate Park, Wolfchase, Davies Plantation, Countrywood, Cordova, Raleigh, Hawkins Mill, Eads, and Blaydes Estates - the doors and openers installed at build time are now anywhere from twenty to over fifty years old. Torsion springs are rated for a set number of cycles, not years, and a 1980s or 90s double-car door that's been opened twice a day since the house was framed is well past the point where the spring should've been swapped. The cold-moderate climate band Bartlett sits in adds its own wear. It's not the brutal freeze you get further north, but you still get enough swing between a humid summer and a cold front in January to work steel springs and nylon rollers harder than a mild climate would. Metal contracts in the cold, lubricant thickens, and a spring that was already near the end of its cycle count is the one that snaps on the coldest morning of the week. That pattern - older stock, moderate cold stress - is the thing we see on repeat calls across the area.