Spring repair in Kearns, Utah

Elevation is the quiet driver: Kearns's 4,429 feet buy it 88.4 freezing crossings a year, and each one flexes the coil like a small unpaid cycle. A door used twice a day and a door used ten times age differently — but both springs live in the same Kearns winter.

Cold adds a second effect: low temperature reduces the fracture toughness of spring steel, so a fatigued spring is likeliest to let go on the first lift of a freezing morning. That is when Kearns spring calls cluster — 94% of the year's freeze–thaw days here fall between November and March.

half the homes in Kearns were standing by 1969, which makes original springs the exception; doors here are typically on their second or third set. The exception is exactly the door to test, because it is far past the 5–7 years this climate allows.

Upgrading to 25,000-cycle springs costs $80 to $150 more and roughly multiplies life by 2.5. With 88.4 freeze–thaw cycles a year working on the steel in Kearns, the upgrade turns a 5–7-year spring into one most owners never replace again — one invoice instead of two.

Whatever the rating, it goes on as a pair and it gets sized to the actual door weight. Cut-price undersized springs fail fastest exactly where winters are hardest.

For context around Kearns: West Valley City runs 82.5 freeze–thaw cycles and 5–7 years of spring life; Taylorsville runs 84.4 freeze–thaw cycles and 5–7 years of spring life; and West Jordan runs 90.5 freeze–thaw cycles and 5–7 years of spring life.

This page runs on Kearns's numbers (88.4 freeze–thaw cycles, 1969 median build, 4,429 ft of elevation) — close to the neighbours', never identical, which is exactly the point of measuring per city.