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How to Keep a Classic Car in Good Condition in Storage

ByDave Stopher

Apr 11, 2024

How to Keep a Classic Car in Good Condition in Storag

Storing a classic car involves much more than just parking it in a garage. It requires specific steps to ensure that the car remains in good condition, ready to drive without needing extensive repairs when it comes out of storage. Proper preparation and storage conditions can prevent a multitude of issues, from rust on the body and engine parts to the deterioration of the interior. Here’s a comprehensive guide on how to store your classic car correctly, including an important section on the role of building insulation.

Choose the Right Storage Location

Indoor vs. Outdoor

Always opt for indoor storage if possible. Indoor environments provide control over humidity and temperature, which are crucial for preserving the mechanical and aesthetic aspects of your classic car. Outdoor storage can expose the car to moisture, sunlight, and extreme temperatures, all of which can rapidly accelerate deterioration.

Environment Conditions

The ideal storage environment should be cool, dry, and well-ventilated to prevent the buildup of condensation, which can lead to rust. The use of dehumidifiers can help maintain an optimal humidity level.

Preparing Your Classic Car for Storage

Clean Thoroughly

Before storing your car:

  •   Exterior: Wash and wax the car to protect the finish. Apply a thorough coat of quality wax to add an extra layer of defense against rust.
  •   Interior: Vacuum the interior to remove any organic materials (food particles, dirt) that might attract pests.
  •       Engine bay: Clean the engine area to prevent corrosion and remove any materials that could catch fire.

Mechanical Preparation

  •   Fluids: Change the oil and replace all fluids (coolant, brake fluid, transmission fluid) to avoid contaminants that can cause internal damage over time according to https://www.yourcarparts.co.uk/ .
  •   Fuel System: Fill the tank and add a fuel stabilizer to prevent the fuel from decomposing and damaging the engine.
  •   Battery: Disconnect the battery to prevent drain. Alternatively, connect it to a trickle charger to keep it charged without overcharging.
  •       Tires: Overinflate the tires to prevent flat spots or place the car on jacks to remove weight from the wheels entirely.

Pest Control

Plug any openings (exhaust, air intake) with steel wool or aluminum mesh to prevent rodents from nesting inside the vehicle.

Insulating the Storage Building

Proper insulation of the storage facility is critical in maintaining the ideal conditions for your classic car. Here’s how to effectively insulate the external building:

Types of Insulation

  •   Fiberglass Batts: These are easy to install between studs and rafters, and they provide excellent coverage with a high R-value for thermal resistance.
  •   Spray Foam: This insulation expands to fill cracks and gaps, ensuring no air leaks. It is ideal for preventing moisture entry and maintaining a stable temperature.
  •       Rigid Foam Boards: These can be used on walls and ceilings and are particularly effective in damp conditions.

Installation Tips

  •   Seal Leaks: Before adding new insulation, seal all cracks and leaks in the building with caulk or expanding foam. This prevents moist air from entering and causing mold or rust.
  •   Vapor Barrier: Install a vapor barrier (a sheet of plastic or foil) on the warm side (interior) of the insulation to prevent moisture transmission.
  •       Proper Ventilation: Ensure that the space is still well-ventilated to avoid the buildup of fumes or condensation.

Regular Maintenance While in Storage

  •   Rotate Tires: If not using jacks, rotate the tires every few months to prevent flat spots.
  •   Run the Engine: Run the engine every few weeks to circulate fluids and maintain engine parts.
  •       Check Fluids: Inspect the levels and quality of fluids and replace them if they show signs of degradation.

Security Measures

  •   Locks: Use high-quality locks and consider an alarm system for the storage unit.
  •       Covers: Use a breathable car cover to keep dust off while allowing moisture to escape and avoid trapping condensation.


Properly storing your classic car is essential for keeping it in pristine condition. By following these steps, you can ensure that your vehicle stays protected from the elements, pests, and other potential hazards. Proper insulation of your storage space plays a vital role in this process, helping to maintain the necessary environmental controls that classic cars require. With the right precautions, your classic car will continue to look and run its best for years to come.