RV condensation is one of the most common — and most damaging — problems winter campers face. When warm air inside your rig meets cold surfaces like windows, walls, and metal frames, moisture collects as water droplets. Left unchecked, this condensation can cause mold growth, wood rot, rust, and damage to furniture and cabinetry. The best way to prevent condensation in your RV is to reduce humidity inside the rig while keeping those cold surfaces insulated. Here are 10 proven ways to do it.
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RV Condensation Solutions at a Glance
| Method | Effectiveness | Cost | Best For |
| Run a dehumidifier | High | $30–$150 | Overall moisture reduction throughout the rig |
| Switch to electric heat | High | $20–$50/heater | Eliminating moisture from propane furnaces |
| Use vent fans | Medium-High | Free (built-in) | Quick humidity relief while cooking or showering |
| Crack a window | Medium | Free | Quick air exchange on milder days |
| Cover windows with insulation film | Medium-High | $10–$30 | Reducing window condensation specifically |
| Use the campground bathhouse | High | Free | Eliminating shower moisture entirely |
| Cook with Instant Pot or oven | Medium | $60–$100 | Reducing steam from stovetop cooking |
| Open cabinet doors | Low–Medium | Free | Preventing mold in enclosed spaces |
| Place DampRid in cabinets | Low–Medium | $5-$15 | Absorbing moisture in small spaces |
| Raise indoor temperature | Low–Medium | Varies | Warming cold surfaces to slow condensation |
What Causes Condensation Inside an RV?
Understanding the cause of condensation will help you to prevent it. Condensation forms when warm, moist air comes into contact with colder surfaces like windows, metal window frames, and exterior walls. The moisture in the warm air is released and collects as small water droplets on those cold surfaces. So the practical solution is to attack the problem from two directions – reduce the moisture inside your RV, and insulate or warm the cold surfaces where condensation forms. Everyday activities like cooking on a stovetop, taking hot showers, or even breathing can add moisture to the air. Propane furnaces are also a major contributor because they release water vapor as a byproduct of combustion. In a small, enclosed space like an RV, that moisture can add up fast and can cause mold, rust, and other problems.
How Do You Reduce RV Condensation?
Here are 10 effective methods for reducing RV condensation, starting with the highest-impact solutions.
Invest in a Dehumidifier
A dehumidifier is the single most effective tool for controlling RV condensation. It pulls moisture directly from the air, reducing humidity levels throughout your entire rig. Run it consistently throughout the winter, and you’ll notice a major difference in how your windows, walls, and cabinets feel. Portable models designed for small spaces work well in most RVs.
Switch to Electric Heat Instead of Propane
Propane furnaces are one of the biggest hidden sources of moisture in an RV. As propane burns, it releases water vapor into the air — which is exactly what you’re trying to get rid of. Switching to electric space heaters keeps the air dry while still keeping you warm.
Important note: If you are relying on a heated underbelly to keep your water system from freezing, this is not the tip for you. The RV furnace must be running for the underbelly to stay warm. In that case, consider using a small space heater under the rig in combination with RV skirting and tank heaters to keep pipes warm while minimizing indoor propane use.
Put Your Vent Fans to Use
Your RV likely has a vent above the stove and one or two ceiling vents. – put them to work! Opening the vents and running the fans a couple of times a day — especially when things start to feel humid — helps push moist air out and pull drier air in. This is especially important during and after cooking.
Open a Window
Even in cold weather, cracking a window for a few minutes lets trapped moisture escape and allows drier outdoor air to circulate in. Some campers use a small RV window fan to speed up the air exchange. You only need to run it for a few minutes, two or three times a day, to make a noticeable difference.
Cover the Windows
Most RV condensation shows up on the windows first, because glass is one of the coldest surfaces in the rig. Covering your windows with a special window insulation film creates a barrier that reduces the temperature difference and limits condensation. Some campers use Reflectix panels cut to fit each window instead — these reduce condensation and add even more insulation, though they do block natural light.
For a more permanent solution, double-pane RV windows significantly reduce condensation and improve insulation. However, they’re heavier and more expensive, so they’re harder to justify if you only use your RV a few weeks per year.
Use the Campground Bathhouse
Hot showers are probably the single biggest source of moisture buildup inside an RV. All that steam goes directly into the air in a very small space. Whenever a campground bathhouse is available, use it instead of your RV shower. This one change alone can make a dramatic difference in your condensation levels.
Change the Way You Cook
Pots and pans on the stove release steam into the air. Keeping your stovetop cooking covered is somewhat helpful. However, avoiding using the stove is even better.
Instead of the stovetop, consider one of the following options:
- RV oven — The oven is a much better alternative to the RV stove. However, even the propane oven can produce some moisture. A convection oven is an even better choice if you have one.
- Instant Pot — An Instant Pot is a fabulous electric appliance to have in an RV for a variety of reasons. It reduces the amount of moisture in your RV when you use it for cooking and release the pressure outdoors.
- Outdoor cooking — Speaking of the outdoors, taking all of your cooking outside will remove the issue of releasing steam into the air entirely.
Avoid Hanging Things to Dry Indoors
Wet towels, clothing, and gear hung up inside the RV to dry add moisture right back into the air and undo the work of your dehumidifier and ventilation. Use campground laundry room dryers during cold months, and hang towels and wet items outside whenever possible.
Keep Cabinet Doors Open
Moisture tends to accumulate in small, enclosed spaces. Keeping your cabinet doors open — especially overnight when you aren’t moving around — allows air to circulate and helps prevent mold growth from trapped condensation. Pop them open before bed so they aren’t in your way during the day.
Place DampRid in Cabinets and Enclosed Spaces
DampRid and similar moisture-absorbing products are an easy, inexpensive way to control humidity in the spots that are hardest to ventilate — cabinets, closets, and storage compartments. They won’t replace a dehumidifier, but they’re a great supplement for smaller enclosed areas.
How Do I Get Rid of RV Condensation During Storage?
If your RV is in storage for the winter, condensation is much less of a concern since you won’t be cooking, showering, or running heaters inside. Still, moisture can collect in cabinets and closets over time.
- Place DampRid in enclosed spaces: Use it in cabinets, closets, and storage compartments, which are the most likely spots for moisture to collect in a stored RV
- Leave cabinet doors open: This allows air to circulate and prevents moisture from getting trapped in enclosed spaces
- Winterize your water system: Draining your water lines can eliminate a source of moisture and prevent freeze damage
Since no heaters will be running, the inside air temperature should be close to the outdoor temperature, which makes condensation much less likely. But it never hurts to take precautions to make sure you don’t return to a damp, musty RV.
Key Takeaways
- Condensation in your RV occurs when warm, moist air contacts cold surfaces, leading to water droplets and potential damage.
- Top strategies to reduce condensation include using a dehumidifier, switching to electric heat, and employing vent fans.
- Cover windows with insulation film and consider double-pane options to significantly limit condensation on glass surfaces.
- Avoid indoor drying, cook smartly, and keep cabinet doors open to help manage moisture levels effectively.
- When storing your RV, use DampRid in cabinets and leave doors open to prevent trapped moisture.
FAQs About RV Condensation
Still have questions about RV condensation and how to keep it in check?
You can’t completely stop moisture from accumulating in your RV in the winter. But there certainly are ways to reduce the amount of moisture in the air in your RV so you can remove condensation from the windows and walls and keep your carpets and furniture from feeling damp.
An RV dehumidifier is the very best thing for this, but the other tips above will also help.
RVing in winter is totally doable, but there are some things you need to know first. Preventing condensation from taking over is just the first step to making your RV winter-proof.
Other steps you should take include insulating the windows, adding insulation to the walls, adding a skirt to the bottom of your rig, using tank heaters and a space heater to ensure your water system doesn’t freeze, adding a heated hose to your setup, and wrapping your sewer hose with heat tape to prevent freezing.
Don’t plan to be in your RV during the winter? In that case, adding some DampRid to the cabinets, winterizing the water system, removing the batteries and placing them on a battery maintainer, and making sure you take steps to prevent pests are all good ways to get your rig ready for winter.
To absorb moisture in your RV, you’ll want to run a dehumidifier all winter long. Placing DampRid in various places throughout the rig will also help absorb moisture, and using the other tips above will ensure you aren’t creating extra moisture in the RV unnecessarily.
To insulate your camper windows, consider adding plastic film to each one. You can also use Reflectix panels cut to fit in each window, but you’ll find that this also blocks out light. For the walls, consider hanging blankets or tapestries on the walls to retain heat. You might also hang something in front of the door (where a lot of heat tends to escape) and put covers on the vents and skylights.
An RV skirt will help keep cold air from blowing under the RV. It’ll also prevent the water system from freezing. There are all sorts of RV skirting options, including inflatable RV skirts, vinyl skirting, and DIY skirts made of hay bales, wood, or whatever else you can find.
RV condensation in winter can be a real nuisance, but it doesn’t have to stop you from camping year-round. By combining the tips above — especially a dehumidifier, electric heat, and good ventilation — you can keep your rig dry, comfortable, and protected from moisture damage all season long.
Looking for more winter camping tips? Check out our guide to keeping warm in your RV during the winter. Don’t want the hassle of owning a camper and thus worrying about RV condensation? Rent one with RVshare!
