How To Keep Moisture Out Of A Car In Storage

Storing your car for an extended period can be a great way to protect it from daily wear and tear. However, one of the most common issues that can arise during storage is moisture buildup. 

Moisture can lead to rust, mildew, and unpleasant odours, which can significantly affect the condition of your car. In this guide, explore several effective ways to keep moisture out of a car while it’s in storage, ensuring that your vehicle remains in excellent condition.

Why Moisture Is a Problem for Cars in Storage

When a car is left in storage, particularly for a long period, the combination of temperature fluctuations and poor ventilation can lead to excess moisture inside and outside the vehicle. This moisture can accumulate in various parts of the car, including the interior, engine, and undercarriage. Over time, this can lead to the following issues:

  • Rust: Metal components of the car, such as the body, wheels, and exhaust system, are prone to rusting when exposed to moisture.
  • Mould and mildew: Dampness inside the car can promote the growth of mould and mildew, particularly on the seats, carpets, and upholstery.
  • Electrical issues: Moisture can damage the car’s electrical components, causing malfunctions or failure.
  • Unpleasant odours: Damp conditions often lead to musty smells, which are difficult to remove without proper care.

Taking steps to prevent moisture buildup during storage can help you avoid these issues and preserve the vehicle’s integrity.

How To Keep Moisture Out Of Your Car

Step 1: Choose the Right Storage Location

The first step in keeping moisture out of your car is selecting the ideal storage location. A well-ventilated, dry environment is essential for preventing the accumulation of moisture. Here are some tips for finding the best storage spot:

  • Indoor storage: If possible, store your car in a garage or storage unit. This will protect it from the elements and help control humidity levels.
  • Avoid damp areas: Do not store your car in areas that are prone to dampness, such as basements or unsealed sheds, as these locations can trap moisture.
  • Use a carport: If indoor storage is not an option, a carport can provide some protection from rain and humidity.

Step 2: Clean and Dry the Car Thoroughly

Before storing your car, it is crucial to give it a thorough cleaning. This includes both the exterior and interior. Dirt and grime can trap moisture, leading to rust or unpleasant smells. Here’s what you should do:

  • Wash the car: Use a mild car shampoo to clean the exterior. Pay attention to wheel wells, undercarriage, and areas where dirt may collect.
  • Dry the car: After washing, dry the car completely using a soft cloth or microfiber towel to remove any remaining water. This will help prevent water from settling into crevices.
  • Clean the interior: Vacuum the carpets, upholstery, and floor mats. Wipe down surfaces with a damp cloth and ensure the interior is free from any food or debris that could attract moisture.

Step 3: Use Moisture Absorbers

Moisture absorbers are a great way to keep humidity levels under control inside your car. These products work by absorbing excess moisture from the air, preventing it from settling on surfaces. There are several options to consider:

  • Silica gel packs: Silica gel is an excellent moisture absorber. Place packs in various locations inside the car, such as under the seats, in the glove compartment, or in the boot.
  • Desiccant bags: Similar to silica gel, desiccant bags can be placed in different areas of the car to absorb moisture. These are available at most auto shops or online.
  • Moisture-absorbing crystals: These crystals can be placed in the car’s cabin or boot. They work by drawing moisture out of the air and can help reduce dampness inside.

Step 4: Use a Car Cover

If you are storing your car outdoors or in a location where it may be exposed to moisture, investing in a good-quality car cover is essential. Car covers are designed to protect your car from rain, snow, and other environmental factors that can contribute to moisture buildup. When choosing a car cover, keep the following in mind:

  • Breathable material: Look for a cover made from breathable fabric, such as cotton or polyester. This allows air to circulate underneath the cover, preventing moisture from getting trapped.
  • Water-resistant: Ensure the cover is water-resistant to prevent rain from soaking through and reaching your car’s surface.
  • Custom fit: A custom-fit cover will provide better protection and ensure the car is fully sealed.

Step 5: Ventilate the Car Regularly

Proper ventilation is one of the most effective ways to prevent moisture from accumulating inside the car. When a car is sealed tightly without airflow, moisture can become trapped, leading to damp conditions. To encourage airflow:

  • Open the windows slightly: If possible, leave the windows cracked open just a small amount. This allows air to circulate while still keeping the car secure.
  • Use ventilation devices: There are specialised car ventilation devices that help promote airflow without letting in dust or rain. These can be especially useful in long-term storage situations.
  • Run the air conditioning before storage: If your car is being stored for an extended period, run the air conditioning for a short time before you park it. This helps to remove excess moisture from the interior.

Step 6: Protect Sensitive Components

Certain parts of your car are more susceptible to moisture damage than others. Taking extra precautions with these components can help prevent issues:

  • Battery: Remove the car battery if the car will be stored for a long time. This will prevent the battery from draining and reduce the risk of corrosion.
  • Tyres: Inflate the tyres to the recommended pressure. Under-inflated tyres can develop flat spots over time, which can be exacerbated by damp conditions.
  • Engine and exhaust system: Cover the exhaust pipe with a cloth or plastic bag to prevent moisture from entering. This will help avoid rust forming in these areas.

Protect Your Car for the Long Term

Properly storing a car requires attention to detail, particularly when it comes to keeping moisture at bay. By following the steps outlined in this article – choosing the right storage location, cleaning the car thoroughly, using moisture absorbers, and ensuring proper ventilation – you can protect your vehicle from the damaging effects of moisture.

Remember, prevention is key to ensuring your car remains in top condition during storage. With the right care, your car will be ready to hit the road when you need it again.

Read more: Common Mistakes to Avoid When Storing Your Car.

Book your car's storage today

Book premium car storage at Autovault today! Call 01371 820317 or fill out our form to secure your spot.