Fleet Washing and Road Salt: Protecting Trucks Through a Vermont Winter

Road salt and liquid de-icers stick to trucks all winter and keep corroding metal until they're washed off. For fleet washing in Vermont, that means washing often during salt season, getting the undercarriage every time, and doing a thorough wash in spring when the roads clear. AAA recommends exactly that for passenger vehicles: wash the whole vehicle frequently, including the undercarriage, and give the undercarriage one last cleaning in spring.

We wash trucks, trailers and equipment on site, so here's what we've learned about keeping a fleet ahead of the salt.

How road salt damages trucks

Vermont winters mean months of salted roads. AAA's research on road de-icers puts it plainly: the rock salt and liquid de-icers used before, during and after storms can rust and corrode vehicle parts, and beyond cosmetic damage, rust can seriously damage brakes, fuel tanks and exhaust systems (AAA, Road De-Icers and Rust Damage fact sheet).

Work trucks get it worse than the family car. They're on the road earlier and later, often during and right after storms when de-icer is at its heaviest, and they spend more hours in the slush.

Where corrosion starts on a work truck

• Frame rails and crossmembers, where salty slush packs in and stays wet.
• Brake lines and brake components.
• Fuel tanks and straps.
• Exhaust systems.
• Wiring connectors and trailer light plugs.
• Hitches, liftgates, plow mounts and spreaders, which take direct spray from the road.
• Body seams and wheel wells, where paint has chipped and bare metal shows.

Why the undercarriage matters most

A truck can look clean from the side and still be caked underneath. A quick rinse at a self-serve bay mostly hits the panels you can see. The salt that does the real damage is up in the frame, around the brakes, and inside the wheel wells.

AAA recommends frequently washing the entire vehicle, including the undercarriage, using a detergent made for vehicles rather than dish soap, to loosen and neutralize road salts. It also recommends a final undercarriage cleaning in spring, because deposits left from winter can keep causing corrosion year-round (AAA fact sheet).

How often to wash a fleet in a Vermont winter

There's no single right number, and we haven't seen a study that sets one. This is the rule of thumb we give fleet managers:

The point isn't the exact interval. It's not letting salt sit on metal for months.

Plows, sanders and equipment need it most

The equipment that puts salt on the road takes the worst of it. A sander body carries salt and sand in direct contact with metal for hours. Plow frames, hydraulic lines and light bars get blasted with brine and slush every pass. Trailers parked all winter with salt dried on them keep corroding while they sit.

For these, washing after a storm cycle matters more than for any other vehicle. Pay attention to the hard-to-see spots: inside the sander bed and spinner, behind the plow mount, along hydraulic fittings, and around electrical connections for lights and controls. Salt that dries in a crevice keeps working on the metal every time it gets damp again.

What a thorough salt-season wash covers

A quick spray of the doors doesn't do much against salt. A wash that actually helps looks more like this:

1. Rinse off loose slush and sand so it isn't ground into the paint.
2. Apply a vehicle wash detergent, not dish soap, to loosen road film and salt.
3. Undercarriage, frame and wheel wells, where most of the salt sits.
4. Body, glass, lights and mirrors, working from the top down.
5. Final rinse, with attention to steps, hitches and anything a driver grabs.

Setting up a fleet washing program

A few decisions up front make regular washing easy to stick to:

• List every vehicle and piece of equipment, and which ones run during storms.
• Pick a schedule for each group, using the table above as a starting point.
• Choose a wash spot at your yard with room to work, away from storm drains if possible.
• Decide on a time window that doesn't pull trucks off the road during working hours.

On-site fleet washing vs. driving to a wash bay

An EPA guide on vehicle and equipment washing notes two things fleet managers already know: many commercial car washes don't have bays big enough for large vehicles, and sending vehicles to an off-site wash costs employee and equipment time in travel and waiting (EPA, Stormwater BMP: Vehicle and Equipment Washing).

On-site washing solves both:

• Trucks get washed where they're parked, at the yard, between shifts or at the end of the day.
• Drivers aren't sitting in line at a wash bay on the clock.
• Box trucks, trailers, plows and equipment that won't fit in a bay get done the same way as pickups.
• The whole fleet gets the same wash on the same schedule, so nothing gets skipped.

Wash water and stormwater

Truck wash water isn't just dirty water. The same EPA guide says vehicle and equipment washing can produce discharges contaminated with sediment, detergents, oils, grease and heavy metals, and recommends avoiding direct discharges to storm drain systems (EPA vehicle washing guide). The EPA also explains that stormwater runoff carries oils, chemicals and dirt into rivers and lakes (EPA NPDES Stormwater Program).

If you're hiring anyone to wash your fleet on site, ask how they handle the runoff at your yard and where the nearest storm drain is. It's a fair question, and a good company will have an answer for your specific lot.

What else helps between washes

AAA's list of preventive steps applies to work trucks too:

• Wash thoroughly before winter starts.
• Repair body damage and touch up chips where bare metal shows.
• Keep a coat of wax on painted surfaces.
• Pull a vehicle off the road if brake warning lights come on, the pedal feels soft, or you smell fuel.

Fleet washing in Rutland and across Vermont

We're based in Rutland and wash fleets for businesses like warehouses and distribution sites, gas stations, contractors and farms. See our fleet washing service page for what's included. If your yard also has a grimy loading area or dumpster pad, we can do that the same visit with power washing. Our Rutland City page covers the home route.

Get a fleet washing quote

Tell us how many vehicles you have, what kind, and how often you'd like them washed. Use the contact page or call (802) 558-3533, Monday through Saturday, 7am to 5pm. Quotes are free.