A Broken Spring in Cold Weather: What's Actually Going On

By Castle Rock Garage Door Pros · Published October 12, 2026 · Updated October 28, 2026

Season by Season

Castle Rock sits in a severe-cold climate band, and that matters more for your garage door than almost anything else about the house. Steel torsion springs lose flex as temperature drops - the metal gets brittle, and a spring that's been winding and unwinding for years without complaint will pick the coldest morning of the year to let go. Most of the housing stock here was built between 1938 and 2005, with a lot of it from the 1980s and 90s clustered across the 22 named areas in this part of the county, including neighborhoods like Terrain and The Meadows close in. That means a lot of original or first-replacement springs are now old enough, and have seen enough freeze-thaw cycles, to be near the end of their wind count right as winter hits hardest. Fall is when we see people trying to get ahead of it. Deep winter is when we see the calls come in after the fact - usually first thing in the morning, door stuck halfway, cable slack on one side. Spring and summer the failures slow down, not because the spring got stronger, but because the cold stopped working against it.

When to Call Someone

If the door won't open and you hear a bang from the garage overnight or at first light, that's very likely a torsion spring letting go - cold makes that moment more sudden, not less likely to happen eventually. Don't try to force the door by hand or with the opener once a spring is broken; the opener isn't built to lift the weight the spring was carrying; you can strip the drive gear or pull the trolley off the track trying. Call when: the door is heavy to lift by hand, you see a visible gap in the coiled spring above the door, or the opener runs but the door barely moves. Also call if a door on a home built before the 1990s has never had the spring replaced - in this climate band, that's borrowed time, not good luck.

What Local Conditions Do

Severe cold does two things to a torsion spring: it stiffens the steel so there's more resistance on every cycle, and it shrinks the metal slightly, which tightens tolerances on the winding cone and bearing plates. Neither of those is dramatic on its own, but stacked over years of Castle Rock winters they shorten the working life of a spring that would have lasted longer in a milder band. Houses from the 1990s median build year are now old enough that factory-original hardware is commonly at or past its expected cycle count, and the cold just moves up the date of failure rather than causing it outright. We don't carry every gauge of spring on the truck for every build era in these 22 areas - older torsion setups sometimes need a part we have to order, and that's a day's delay we'll tell you about upfront rather than guess at.

The Situation

If your door is from a home built in the 1980s or 90s - which covers a large share of the housing stock out here - and it's never had the spring swapped, cold weather is the thing most likely to end that spring's run. It isn't a defect in your door. It's steel doing what steel does at low temperature after decades of cycles. The fix itself is usually straightforward: match the spring to the door weight and wind count, which is different for a single wide door than a pair of standard doors, and get it back under proper tension. What's not worth doing is patching an old spring with a lighter-duty replacement to save a little - in this climate it tends to just bring you back to the same call next winter.

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