10 Essential Tips How to Prevent Mould in Your RV During Storage

Since RVs are smaller, enclosed environments with limited airflow, they are especially prone to mould growth—particularly when in storage. Preventing mould in an RV is critical to ensuring your vehicle remains a safe, clean, and comfortable space for your travels.

Here’s your comprehensive guide on how to prevent mould in your RV during storage.

What are the main causes of mould in your RV in storage?

Mould thrives in environments with moisture and poor air circulation, both of which are often present in stored RVs. The combination of humid weather, condensation, and lack of ventilation in an RV makes them an ideal breeding ground for mould spores. When these microscopic spores find moist surfaces, they begin to grow, leading to visible mould colonies that can be difficult to remove.

Common areas where mould in a RV can develop include:

• Bathrooms and kitchens: Due to the use of water.
• Closets, drawers, and under beds: These areas lack proper air circulation, making them prime spots for mildew in your RV.
• Corners of walls and under carpets: Moisture can accumulate unnoticed.

Why Preventing Mould in RV Campers During Storage Matters

Preventing mould in an RV is not just about preserving the value of your RV—it’s about your health. Exposure to mould spores can cause symptoms like coughing, sneezing, nasal congestion, skin irritation, and even severe respiratory conditions. Additionally, mould can damage the interior, leading to costly repairs and decreasing the resale value of your vehicle. Taking the right steps to protect your RV while it's in storage can save you money and ensure that your RV remains a comfortable space.

What are the Best Ways How to Prevent Mould in Your RV During Storage?

Here are our 11 tips for preventing mould in your RV during storage:

1. Perform a Pre-Storage Inspection

Before putting your RV into storage, give it a thorough inspection. Check every area for signs of mould in your RV, leaks, or cracks. Ensure that your slide-outs, roof vents, windows, and doors are properly sealed. Even the tiniest crack can allow moisture to seep in, creating the perfect environment for mould.

2. Give your RV a Deep Clean Before Storing

A clean RV is less likely to harbour mould. Make sure to:

• Clean all surfaces, including walls, floors, and ceilings.
• Dry everything completely before storing to prevent moisture buildup.
• Remove any food or organic material that could attract moisture or pests. Regular cleaning can help maintain the value of your RV.

3. Drain Water Systems

Water is the enemy when it comes to preventing mould in an RV camper. Be sure to drain all your water systems, including the plumbing, water heater, and holding tanks. Use an air compressor to blow out any residual water from pipes, faucets, and drains. Protect your RV by ensuring no standing water is left inside and your RV is dry inside and out.

4. Use Dehumidifiers

Humidity plays a significant role in mould growth. Mould spores thrive in moist environments, and high humidity levels inside your RV can create the perfect conditions for mould and mildew to develop. By keeping humidity levels below 60% using a dehumidifier or small dehumidifier, you can significantly reduce the chances of mould in your RV.

Using a dehumidifier is one the best ways to keep mould from forming by reducing moisture in the air, especially in humid climates. It’s also essential to check and address any moisture that might accumulate in hidden areas such as under beds or inside cabinets, as these are common spots for mould and mildew to develop.

5. Open Cabinets, Closets, and Drawers

Airflow is essential in preventing mould in RV camper storage. Leave cabinets, closets, and drawers open to allow air circulation throughout the RV. You can also prop open the fridge and freezer to prevent mould and mildew from building up in those areas.

6. Use Moisture Absorbing Products as Mould Prevention

Products like silica gel, DampRid, or activated charcoal can help control humidity levels in small, enclosed spaces where your dehumidifier might not reach. Place them in drawers, cabinets, closets, and other confined areas to further protect your RV from moisture.

7. Keep a Fan Running

If possible, keep a fan running to help air circulate and prevent the buildup of stagnant air. Proper air circulation ensures that mould spores cannot settle and start growing on surfaces.

8. Use an RV Cover

If you must store your RV outdoors, using a high-quality, breathable RV cover can protect it from rain, snow, and humidity. Make sure the cover allows moisture to escape, as non-breathable covers can trap moisture inside and worsen mould in an RV.

9. Monitor Humidity Levels

Using a hygrometer inside your RV allows you to monitor humidity levels. Ideally, indoor humidity should be kept below 60% to reduce the risk of mould. If it climbs higher, run a dehumidifier or improve air circulation.

10. Check Your RV Regularly

Don’t leave your RV untouched for months at a time. Visit the storage site periodically to check for any signs of mould or mildew. This also allows you to ensure that the dehumidifier and fan are still functioning correctly. Regular inspections will help maintain the value of your RV.

11. Choose the Right Storage Space

Choosing the best storage facility for your RV camper is crucial. Climate-controlled and indoor storage areas are ideal because it minimises exposure to external moisture and fluctuating temperatures. 

SpaceMate is a peer-to-peer storage platforms, where you can find safe, dry, and affordable storage options near you. For more insights on selecting the best storage option, check out our Ultimate Guide to Self Storage.

Signs That Your RV May Already Have Mould

• Musty Odour: A strong, musty smell is often the first sign of mould.
• Discolouration: Visible black, green, or white spots on surfaces indicate mould growth.
• Condensation: Persistent moisture on windows, walls, or ceilings can lead to mould formation.
• Allergy Symptoms: Increased coughing, sneezing, or respiratory discomfort could signal mould presence.
• Warping or Softening: Warped wood panels or soft upholstery may indicate water damage and mould in an RV.

If you notice any of these signs, act quickly to prevent further damage and potential health hazards. Check out our guide here on how to get rid of mould and kill mould if you notice any of the above signs. 

Extra Tips to Stop Mould From Growing in Your RV

• Ventilation: If possible, crack a window or roof vent. Just be cautious of weather conditions to prevent moisture from entering.
• Use a Desiccant: A desiccant dehumidifier can absorb moisture in areas with moderate humidity.
• Temperature Control: In colder climates, using a space heater periodically can reduce humidity and prevent condensation inside the RV, thereby helping to protect your RV.

Final Thoughts

RV during storage is incredibly vulnerable to moisture, and taking the necessary steps to prevent mould formation is essential. By following these steps, you can greatly reduce the risk of mould and maintain the value of your RV. From thorough pre-storage cleaning to regular inspections, taking preventative measures is essential to preserving your RV's condition and ensuring a healthy environment.

By following these preventative measures, you can keep your RV mould-free and ready for your next adventure!

Frequently Asked Questions

1. How often should I check my stored RV for mould?

It’s recommended to check on your RV every few weeks to ensure no moisture is accumulating and that no mould is forming.

2. Can I store my RV outside and still prevent mould?

Yes, but use a breathable RV cover, monitor humidity levels, and use dehumidifiers or moisture absorbers inside the RV.

3. What temperature should I maintain in my stored RV?

Keep your RV’s interior temperature between 18°C and 24°C to minimise the risk of mould growth.

4. Can mould damage my RV permanently?

Yes, mould in an RV can cause structural damage, including ruined upholstery and weakened walls if left untreated.

5. How often should I check my stored RV for mould?

It’s best to check on your RV every few weeks to ensure moisture isn’t accumulating and mould isn’t forming.

6. Can I store my RV outside and still prevent mould?

Yes, but use a breathable RV cover, monitor humidity levels, and use dehumidifiers or moisture absorbers inside the RV.

7. What temperature should I maintain in my stored RV?

Keep your RV’s interior temperature between 18°C and 24°C to minimise moisture and mould growth.

8. Can mould damage my RV permanently?

Yes, mould can cause structural damage to your RV, including ruining upholstery and weakening walls if left untreated.

9. How can I effectively prevent mold in my RV?

To effectively prevent mold in your RV, consider the following tips: First, always clean your RV thoroughly before storing it. Second, use a dehumidifier to eliminate excess moisture from the air. Third, ensure proper ventilation by keeping windows cracked or using vents. Fourth, store your RV in an enclosed storage unit if possible to protect it from outdoor elements. Lastly, regularly inspect your RV for any signs of mold or mildew and address them immediately.

10. Is using a dehumidifier necessary for RV storage?

Yes, using a dehumidifier is highly recommended during RV storage. A dehumidifier helps to control the moisture levels within your RV, reducing the likelihood of mould and mildew growth. You can use a small dehumidifier that is specifically designed for RVs to maintain optimal moisture levels. This is particularly important if your RV is in storage for an extended period.

11. What is the importance of airflow in preventing mold?

Airflow is essential for preventing mold in your RV as it helps to keep moisture levels low. Stagnant air can trap humidity, allowing mold spores to settle and grow. To enhance airflow, leave cabinet doors and storage compartments open, especially during storage. 

Extra References to Get Rid of Mould: 

1. CHOICE - A comprehensive guide on how to effectively use vinegar and bleach to remove mould, including expert advice on choosing cleaning methods. Read more here.
2. EPA - This guide provides detailed tips on mould cleanup techniques, highlighting when to call a professional and the health risks associated with mould exposure. Check the guide.
3. Better Health Channel - This government health site covers mould's impact on health, tips on prevention, and when to seek professional help. It can be referenced to back up health-related statements in your blog. View the site.
4. NSW Health - Offers a local Australian perspective on dealing with mould, including health warnings and prevention methods specific to humid climates Learn more.
5. National Asthma Council Australia - Provides advice on how mould can affect people with respiratory issues like asthma.  Read more here.
6. Mayo Clinic - This site explains the symptoms of mould exposure and health effects. Check it out here.
7. Queensland Government - Health Information - Provides official guidance on mould prevention and removal, including health considerations, tailored for Queensland residents. Learn more.