Quick answer: Commercial roll-up door winter prep is a short walk-through before November: clear and inspect the guides, replace torn bottom seals, test sensing edges and photo eyes, try the hand chain or crank, and have a technician check the springs and operator. In Portland and Vancouver, the real threats are freeze-thaw, Gorge east winds and ice storm outages.
Key takeaways
- Walk every door before the first freeze, which NWS Portland puts around November 11 at the airport.
- Test sensing edges at least weekly, as DASMA advises, and pull any door that fails out of automatic service.
- Keep dock doors closed in high wind, and learn to run each door by hand before an outage.
- A loud bang, a sagging curtain or a door that suddenly feels heavy means stop and call. Springs and cables are technician work.
What does commercial roll-up door winter prep include?
Walk each door while the weather is still dry: NWS Portland says nearly 90 percent of the city’s rain falls between mid-October and mid-May.
DASMA’s maintenance guide for rolling doors tells supervisors to check the headplate brackets, guides, drive system and counterbalance, and to test sensing edges. Here is how that looks at a shop or dock.
| Component | Check | What a problem looks like | How often | Who does it |
|---|---|---|---|---|
| Sensing edge and photo eyes | Reversal and beam tests | No reverse, or closes with the beam blocked | Weekly | Your staff |
| Guides and tracks | Bends, loose anchors, debris, ice | Curtain drags, binds or leaves the guide | Monthly | Staff looks, technician repairs |
| Bottom and weather seals | Tears, flat spots, daylight | Water under the door, bar frozen to the slab | Monthly | Staff looks, technician replaces |
| Hand chain or crank | Run the door by hand | Much harder to move than before | Before winter, after outages | Your staff |
| Operator and drive | Watch a full cycle | Hums, slow travel, grinding | Monthly | Staff watches, technician services |
| Springs, cables, counterbalance | Look and listen only | Loud bang, coil gap, frayed cable, heavy or crooked door | Yearly inspection | Technician only |
Your staff can look, listen and test. Anything under spring tension or carrying the door’s weight is technician work.
What fails first on commercial doors in cold, wet weather?
Around Portland and Vancouver, the first failures usually come from water, not deep cold. NOAA normals put the Portland airport at about 32 mornings a year at or below freezing, and 20 degrees or colder is rare. The usual pattern is measurable rain on about 18 or 19 days a month from November through January, then a clear night below freezing.
- Bottom seals. A torn seal lets rain under the door, and the bottom bar can freeze to the slab. Our article on a garage door frozen to the ground explains why forcing it does damage.
- Guides. Water and grit collect at the bottom of the guides and can freeze, so the curtain binds. A guide bent by a forklift makes it worse.
- Springs. DASMA notes that rust thins spring wire and reduces its strength, and a worn spring can let go on a cold morning.
- Operators. Stiff grease and a frozen door make the motor and drive work harder.
If a door will not move, stop pressing the button, and never pry the curtain up with a forklift.
Roll-up vs sectional: different doors, different checks
A rolling steel door coils a curtain of slats onto a barrel above the opening, with its springs inside the barrel. A sectional door has hinged panels that roll up a track, with springs on a shaft above the door and cables down to the bottom corners.
Roll-up doors: look for dented slats, a level bottom bar, straight and firmly anchored guides, and a hood without gaps. The door should run smoothly, without grinding or banging. Keep pallets out of the guide area.
Sectional doors: check panels for cracks, rollers and hinges for wear, and tracks for bends. Look at cables and bottom brackets without touching them, since DASMA says bottom brackets should be adjusted only by a trained technician. Lubricate hinges and rollers per the manufacturer, never the tracks.
When impact damage piles up, replacement can make more sense than repair. Our garage door installation team at Larry Myers Garage Doors can walk you through replacement, and our post on design ideas for commercial garage doors helps if the door faces customers.
How often should you test sensing edges and photo eyes?
Weekly. DASMA’s rolling door guide says to test sensing edges at least weekly. The sensing edge is the strip along the bottom of the door that tells the operator to stop and reverse on contact. Photo eyes do the same job with a beam across the opening.
Edges can stiffen in the cold and road spray coats the lenses. Each week:
- Clear the opening of people and vehicles, and stand by the stop button.
- Close the door onto a 2×4 laid flat in its path, or run the test your operator manual describes. The door should stop and reverse on contact.
- With the door open, block the photo eye beam and try to close it. The door must not close.
- Wipe the lenses with a soft cloth and check that they still line up.
- If a door fails, take it out of automatic service, post a sign and call.
Log each test by date and door.
Power outages and manual operation at the dock
Winter outages here usually start with trees and limbs falling on power lines. Portland General Electric reported that its February 2021 ice, snow and wind storms affected 421,649 customers, and about a quarter of them lost power more than once.
Most commercial doors have a hand chain, a crank or a disconnect for manual use. Run each one by hand before winter. DASMA’s guide says the force needed should stay under 35 pounds on a hand chain and 25 pounds on a crank. If a door takes much more, or more than it used to, call a technician.
Disconnect an operator only with the door closed, since a door with a spring or cable problem can drop if released while open. On sectional doors, lift at a handle or gripping point near the bottom, never at the joints between sections, as DASMA warns. Lock any door you opened by hand before you leave.
For a door you cannot do without, ask about a battery backup operator, which DASMA recommends for outages.
Swan Island, Rivergate, Columbia Business Center, Fruit Valley: what we see
From Swan Island and Rivergate in Portland to Columbia Business Center and the Fruit Valley warehouses in Vancouver, winter trouble usually comes back to three risks.
- Freeze-thaw on unheated guides and tracks. Rain gets into the guides, and a clear night freezes the door in place. Vancouver runs a bit colder: NOAA normals put the average January low at Vancouver’s Pearson airport at 34.4 degrees, about two degrees below Portland’s airport.
- Gorge east winds on east-facing docks. NWS Portland explains that the narrow Gorge funnels east winds, strongest at its exit, so east-facing docks and sites nearer Troutdale, Gresham and Camas tend to take the most. DASMA’s data sheet on high wind events warns that a door can be blown in or pulled out of the opening, and that homemade bracing adds weight and can make the tracks fail.
- Multi-day outages after ice storms. Our worst ice comes when cold air pools in the Gorge and Columbia Basin while warm, wet Pacific air rides in over it, as the NWS describes. When lines come down, docks may run by hand for days.
We serve Multnomah, Clackamas, Washington and Clark counties. Call our Portland line at 503-852-9238 or our Vancouver line at 360-777-6854.
When to call a professional
Stop using the door and call if you notice any of these:
- A loud bang from the barrel or spring area, or a gap in a spring coil.
- A door that suddenly feels heavy, hangs crooked or sags on one side.
- A frayed or slack cable, or a curtain out of its guide.
- A sensing edge or photo eye that fails the weekly test.
Keep people and forklifts clear, do not pull the disconnect with the door up, and leave the door where it is. Springs store a lot of energy, and DASMA calls them arguably the most dangerous part of a door.
Our garage door repair technicians work on residential and commercial doors, with same-day service available and no extra charge on Saturdays. For a pre-winter inspection or a replacement quote, request a free estimate.
Frequently asked questions
How often should commercial garage doors be serviced?
Test sensing edges at least weekly, as DASMA recommends for rolling doors, and look each door over monthly. DASMA also recommends a yearly visit from a trained technician. Busy dock doors usually benefit from more frequent service, so plan a visit before winter and another after it.
What causes a commercial roll-up door to freeze or jam?
Usually water. Rain gets under a worn bottom seal or collects in the guides, then freezes overnight, so the bottom bar sticks to the slab or the curtain binds. Bent guides cause jams too. If a door will not move, stop pressing the button, since forcing it can damage the curtain and the operator. Call us to free it safely.
Can cold weather damage a warehouse door motor or opener?
Cold by itself usually does not ruin an operator, but it can make one work harder. Grease stiffens, and a bottom bar frozen to the slab holds the door down. Pressing the button again and again against a stuck door strains the motor and drive. Let the ice clear, and have a technician check any operator that hums without moving.
Should a shop keep the dock door closed between deliveries in winter?
Yes, in most cases. A closed door keeps heat in and wind-driven rain out. It matters most in high wind: DASMA warns that keeping a garage door open during a high wind event leaves interior walls, ceilings and roof structure vulnerable to structural damage. When strong wind is forecast, keep the dock doors closed until it passes.
Need a hand with your shop or dock doors?
Larry Myers Garage Doors has treated Portland and Vancouver customers like neighbors since 1973: transparent, affordable pricing, same-day service available, no extra charge on Saturdays, work backed by our warranty, and estimates that are always free.
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