Keeping roll-up doors and shutters working through a wet, salty winter

Why Richmond is hard on roll-up doors

Richmond sits on flat delta land close to sea level. It gets more wind off the Strait of Georgia than most of the region, and the high water table keeps ground and concrete damp through the wet season. For the rolling steel doors on warehouses, storefronts and storage units, that means three things working against them at once.

• Salt air. Fine salt settles on the curtain and in the guides, and speeds up rust on steel parts and fasteners.
• Constant damp. Doors rarely get a chance to dry out between October and spring.
• Wind-driven rain. Rain is pushed into the guides and under the bottom bar, carrying grit with it.

Doors near Steveston and along the dykes in Terra Nova tend to show it first, but units in East Richmond and the warehouse areas around Brighouse get the same damp air.

Where the wear shows up

Guides

The guides on either side of the opening collect grit, sand and salt. As rust builds up inside them, the curtain drags. A door that once rolled up easily starts to jam partway or needs a hard pull.

Slats and endlocks

The curtain is made of interlocking slats. Rust starts at the edges and where paint has been chipped by impacts. Bent or dented slats from a pallet or a vehicle catch in the guides and wear them faster.

Bottom bar and weather strip

On flat lots, water pools at the door if the bottom seal is worn. A cracked or flattened weather strip lets rain, wind and debris in under the door, and a bent bottom bar leaves gaps no seal can close.

Springs and the barrel

The spring inside the barrel at the top of the door is what makes the curtain feel light. Damp air can rust it, and as tension drops the door gets harder to lift by hand or slower under a motor.

Motors and controls

On motorized doors, a motor that hums but does not move the curtain often points to a door that has become too stiff, or to a fault in the operator itself.

A simple winter routine

You do not need special tools to slow down most of this. Staff can handle the basics on a regular schedule.

• Rinse the curtain and guides with fresh water when they look dusty or crusted, and let them dry.
• Brush or wipe out grit and leaves from the bottom of each guide.
• Look at the bottom weather strip for splits, gaps and flattened sections.
• Check that the door rolls up and down smoothly, without catching at the same spot each time.
• Note any new rust, bent slats or loose fasteners and report them.
• Keep pallets, carts and stock back from the door so the curtain is not knocked.

Use only the lubricant the door's maker or your service technician recommends, and only where they say. Heavy grease in the guides on a salty, gritty site can trap dirt and make things worse.

Signs a door needs a technician

• The door is noticeably harder to lift, or will not stay up
• The curtain jams in the guides or comes out of them
• Slats are bent, cracked or badly rusted at the edges
• The bottom bar is bent and the door no longer seals at the floor
• The motor hums, strains or trips without moving the curtain

If a door is hard to lift, the cause is usually dropped spring tension or dirty or bent guides. Adjusting the tension and cleaning the guides fixes many doors. Spring tension work should be left to a technician, because the spring is under load even when the door is closed.

Repair or replace the curtain

If only a few slats are damaged and they are a standard profile, they can often be replaced on their own. When the curtain is badly bent or rusted across many slats, replacing it as a whole can make more sense. Most adjustments and slat repairs take a few hours. A new curtain takes longer.

Storefront shutters and counter grilles

Security shutters over windows and service counters in shopping areas such as Brighouse face the same damp air, often with less attention. A shutter that sticks can leave a shop unsecured at closing time or stuck shut in the morning. Give them the same rinse and visual check as the larger doors.

When to call a professional

If your doors are already rusting at the guides, getting harder to lift, or letting water in under the bottom bar, it is worth having them looked at before the coldest weeks. A technician can clean and adjust the guides, set spring tension, replace a weather strip or damaged slats, and tell you which doors are likely to need more work next year. For doors close to the water, regular cleaning and lubrication is the main thing that slows rust down.