Moisture is one of an RV’s biggest enemies. It sneaks in through cooking, showering, and changes in the weather. If left unchecked, moisture can lead to mold, mildew, and damage to the interior of your RV. With a few simple RV moisture control habits and the right tools, you can keep your RV dry, comfortable, and in great condition.
Why Moisture is a Problem in RVs
RVs are smaller and more tightly sealed than traditional homes, which makes moisture buildup a bigger issue. Unlike a house, an RV doesn’t have as many natural air circulation points, meaning humidity tends to linger. High humidity causes condensation on windows, walls, and ceilings, which leads to water damage over time. If ignored, this can warp wood, weaken structural components, and create a breeding ground for mold and mildew, both of which can pose health risks.
Signs of Excess Moisture in Your RV
If you’re wondering whether moisture is a problem in your RV, there are a few clear signs to look for. Condensation on windows is one of the first indicators. If your windows are fogging up in the morning, your humidity levels are likely too high. A musty smell inside your RV is another warning sign, as it suggests mold or mildew growth. Soft or spongy walls and ceilings could mean water damage has already set in. If you notice any of these issues, it’s time to take action.
How to Reduce Moisture in Your RV
The first step in moisture control is ventilation. Make it a habit to crack a window or run your RV’s roof vent, especially when cooking or showering. Even in cold weather, allowing fresh air to circulate can help keep humidity levels in check.
A dehumidifier can also make a huge difference. If you’re in a humid climate or spend extended time in your RV, a small dehumidifier can help pull excess moisture from the air. Moisture-absorbing products, like silica gel or DampRid, can be useful in small spaces like closets, cabinets, and under beds.
Proper insulation is another key factor. If you’re dealing with frequent condensation, check your RV’s insulation and consider adding thermal window coverings. Keeping your RV heated in cold weather can also prevent condensation from forming on cold surfaces.
Preventing Mold and Mildew
Once moisture becomes a problem, mold and mildew can spread quickly. Regular cleaning is essential to prevent them from taking hold. Wipe down surfaces, especially around windows, walls, and vents, where condensation tends to form. If you do spot mold, clean it immediately with a mixture of vinegar and water or a mold-specific cleaner.
Storage matters, too. Avoid packing your RV too tightly with gear, as this can reduce airflow and contribute to trapped moisture. If you’re storing your RV for the season, make sure it’s completely dry before sealing it up. Leave vents slightly open and use moisture-absorbing materials inside to keep humidity levels low.
Dealing with Water Leaks
Even if you’re doing everything right, a leak can introduce moisture where you least expect it. Regularly inspect your RV for leaks, especially around windows, doors, and the roof. Seals and caulking can deteriorate over time, so make sure to reseal any areas that show signs of wear. If you notice water stains or peeling wallpaper, it’s a sign that moisture is getting in somewhere and needs to be addressed right away.
Keeping moisture under control in your RV doesn’t have to be a constant battle. With good ventilation, regular maintenance, and a few key tools, you can keep your home-on-wheels dry, comfortable, and in excellent shape for all your adventures.
FAQs About RV Moisture Control
Why does my RV always feel damp inside?
RVs can feel damp due to poor ventilation, high humidity levels, or hidden water leaks. Improving air circulation, using a dehumidifier, and checking for leaks can help resolve the issue.
Can I use a household dehumidifier in my RV?
Yes, but make sure it’s appropriately sized for your space. A smaller, portable dehumidifier is usually best for an RV, as it won’t take up too much room or use excessive power.
What’s the best way to dry out an RV after a trip?
Open windows and roof vents to allow air circulation. Run a fan or dehumidifier if necessary, and wipe down any condensation on windows or surfaces. If anything got wet during the trip, make sure it’s completely dry before storing it away.
Should I run my RV’s air conditioner to control humidity?
Yes, air conditioners help remove moisture from the air, making them a great option in hot, humid weather. Some RVs also have a built-in “dry mode” that specifically reduces humidity levels.
How do I prevent moisture buildup in my RV while storing it?
Make sure your RV is completely dry before storage. Leave roof vents slightly open with vent covers to allow airflow, and use moisture absorbers inside. If possible, store your RV in a covered or climate-controlled space to reduce humidity exposure.
Tennga RV Consulting offers professional RV inspections and services in North Georgia and South Eastern Tennessee. Contact us to schedule an appointment.