Q: Can i bolt a sheet of wood underneath my car to prevent rust?

asked by on February 16, 2017

I live in New York state, so cars are always getting torn up by rust and salt damage. I noticed that most cars are open underneath, with a lot of exposed metal.

Is it safe to bolt a sheet of wood underneath to try and prevent some of that damage?

Hello, and thank you for writing in. Wood absorbs water, and due to that physical trait, you should not use wood to help prevent rust damage. This will instead hold the moisture close to the metal components and influence them to rust faster. This type of maintenance has more to do with prevention. You should look into chemical sprays that you apply to the bottom of the vehicle that keep water off of the metal surfaces. Another common way to handle this is to use a quality vehicle wax twice a year. This is more for the body and where it attaches to the frame. Use a separate spray for the bottom of the vehicle. If road salt is commonly used in your area, you will want to make sure it gets washed off as soon as possible. Even rinsing the vehicle after it gets a light coating of road salt will help dramatically. If you already have some rust damage, you should remove that rust and treat it so that it stops the corrosive damage. For more help, contact our service department to schedule an appointment, we would be happy to take a look.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing


Experienced Mechanic?

Earn up to $70/hr

What others are asking

What is the ideal tire pressure?
You should always inflate your tires to the pressure levels specified on the tire and loading information label. This label can be found on the driver’s doorjamb.
Brakes will not decelerate and steering wheel seized
This issue that would need to be inspected firsthand. In the case of such a catastrophic event, I would guess some Diagnostic Trouble Codes (DTCs) would be stored. Retrieving these codes is the first step in the diagnostic process. It...
Steering wheel is hard to turn whenever I slow down turning a corner and when stopped.
In order to test the power steering pump you'll need to produce the correct amount of pressure. A mechanic would need to do a high pressure test to get the pressure of the pump. You may have a bad power...
Intake air flow leaking. What makes this happen?
Hi there. When having the code P0171 (https://www.yourmechanic.com/article/p0171-obd-ii-trouble-code-system-too-lean-bank-1-by-andrew-quinn), the fuel system is too lean. This could be the fuel pump is not working, the fuel filter is dirty or plugged, or the injectors are plugged or not working properly. Check...
Key stuck in the ignition.
To remove the key from the ignition switch, try turning the steering wheel left and right as you turn the ignition switch. Make sure that the vehicle is in park to make the interlock solenoid unlock the ignition switch lock....
My 2008 Mini Cooper S has a check engine light on and the code is P0977.
The code P0977 (https://www.yourmechanic.com/article/p0977-obd-ii-trouble-code-shift-solenoid-b-control-circuit-high-by-brady-klopfer) will set if the transmission control module (TCM) records an abnormal voltage reading from a shift solenoid in the transmission. A vehicle with the P0977 trouble code will generally be driveable but due to the potential...
My car won't stay running unless I hold the gas pedal down.
This is likely as your symptoms do fall into that category because a clogged or malfunctioning idle air control valve may not allow enough air into the engine to maintain a good idle speed. A faulty air temperature and engine...
How much for a head gasket replacement job?
Hi There, It sounds like you may be correct in that this is a classic sign of a blown head gasket. A blown head gasket may cause a number of different symptoms. Coolant in the engine oil, an engine misfire...
Nissan exterra security light flashing car won't start
This suggests you have a malfunction in your security system that is disabling the ability of the vehicle to start. When the security system is functioning properly, the goal is for it to disable the car's ability to start when...

Related articles

Is Rustproofing Your Car a Good Idea?
Rustproofing Rustproofing and undercoating your vehicle can protect it from corrosion and rust (https://www.yourmechanic.com/article/how-to-repair-a-rust-hole-in-your-car). This is especially important for the undercarriage of your vehicle, which commonly comes into contact with substances such as water, chemicals such as salt, and other...
How to Protect Your Car From Rust
Rust Rust on a vehicle not only looks unsightly, but also reduces the value when selling the vehicle or using it as a trade-in to purchase a new car. Once in place, rust eats away at the surrounding metal. Over...
The Best Tool to Heat Up Rusted or Seized Parts
A micro torch is a great addition to a mechanic's tool box. It can clean rust that has built up in various parts of a car.