Few cities put garage doors through what a Minneapolis winter does. Long stretches below zero, heavy snow, road salt and the freeze-thaw swings of early spring all take a toll on springs, openers, seals and the concrete the door closes against.
Housing adds its own twist. Many older neighborhoods have detached garages along alleys, often decades old, while newer houses, in the city and across the suburbs, usually have attached two-car garages. The problems differ, and so do the fixes.
What breaks on the coldest mornings
Torsion springs carry the weight of the door, and years of cycles leave them fatigued. Deep cold is often the last straw, so a sharp bang from the garage during a cold snap usually means a spring has broken. After that, the door feels extremely heavy and the opener may hum or strain without lifting it.
Openers struggle too. Grease in the gear housing and on the rail thickens, the door itself stiffens, and the opener's force limit may trip and send the door back up. A bottom seal frozen to the slab adds even more resistance.
Do not try to unwind or replace a torsion spring yourself. The stored energy can break bones, and the winding bars and set screws involved are easy to get wrong. That work belongs to a technician with the right tools.
Detached alley garages
Older detached garages often sit on slabs that have shifted with decades of frost heave, so the opening is no longer square and the door drags, gaps at one corner or binds in its track. Shimming the track, adjusting the bottom seal or adding a threshold seal can help; a badly heaved slab may need concrete work first.
Many still have older doors with extension springs running along the horizontal tracks. If yours does, look for a safety cable threaded through each spring so a break can't send it whipping across the garage, and have one added if it's missing.
Some alley garages have no opener at all, or no outlet near the ceiling. Adding power, an opener with rolling-code security and a light on the alley side makes late arrivals in January a lot easier.
When a snow emergency meets a stuck door
The city declares snow emergencies that restrict street parking while plows work, and a garage door that won't open can leave your car with nowhere legal to sit. Cars left where the posted rules say not to park can be ticketed and towed, so if the door fails during a storm, call early instead of waiting until the parking rules take effect.
If the door is stuck partway open, don't pull the emergency release: with a broken spring, nothing holds the door up and it can slam down. If it's closed and won't budge, don't force it with the opener or pry at the bottom edge; a frozen seal or a broken spring is the likely cause.
Insulation and seals for attached and tuck-under garages
When a bedroom or living room sits over or beside the garage, the door affects comfort and heating bills. Doors with a polyurethane foam core and a thermal break between the inner and outer steel skins hold heat better than hollow or polystyrene-filled doors.
Perimeter weatherstripping, a bottom seal sized for your slab and tight joints between sections matter as much as the R-value printed in the brochure.
A fall checklist before the first hard freeze
October is the month to do this in Minneapolis. Half an hour now prevents most January surprises.
- Treat the hinges, rollers and spring coils with a cold-rated garage door spray.
- Replace a cracked or flattened bottom seal.
- Put a flat piece of lumber on the slab beneath the door and run it down; it must reverse the moment it makes contact.
- Wipe the photo-eye lenses and make sure their brackets are tight.
- Put fresh batteries in remotes and the keypad, since cold drains them.
- Book a professional tune-up if the door is noisy, jerky or slow.
Last updated by the American Garage Door Team.