By Cheri Sicard
When temperatures drop and leaves turn, plenty of RV owners start thinking about winter camping. Some do it by choice, others because they have no better housing option. Either way, cold camping can be rough on both people and rigs if they go in unprepared.
The video guide at the end of this post from Josh the RV Nerd at Bish’s RV walks through real-world tips to stay safer, protect the RV, and avoid some very expensive and dangerous mistakes.
The four seasons RV myth
Josh says that every fall, RV Facebook groups fill up with posts like, “Why is everything freezing? I was told this is a four-seasons camper.”
The hard truth is that most “four seasons” claims are mostly marketing. RVs are not built like houses, especially when it comes to insulation and wiring. The best way to cold camp is to avoid the cold when possible, but many people do not have that choice. So the next best step is to understand the weak spots and common rookie mistakes before the first hard freeze hits.
Space heaters: A real safety hazard
Many “expert” guides and even some dealers push portable space heaters as a cheap way to save propane. In an RV, that can be a fast route to a fire.
RV wiring is lighter than residential wiring. The receptacles, breakers, and wire size are not meant for long-term high loads. A 1,500-watt heater can heat up a receptacle over time, loosen connections, and start melting plastic. That might happen while everyone is asleep.
A tiny heater can still be a 1,500-watt heater. Many small units are labeled as 1,500-watt only, even if they have low, medium, and high settings. They still pull full power and put the RV circuit under stress.
A space heater should never go into a power strip or cheap extension cord in any building, and especially not in an RV. That is a major fire risk in a very small space filled with soft materials.
Clutter is another danger. If a blanket, bag, or coat falls over a heater, things can go bad very fast.
Electric fireplaces: The planned exception
Built-in electric fireplaces are different from plug-in space heaters because:
- They are factory-installed and expected to be there.
- They sit on their own dedicated circuit that is sized for that load.
That does not make them magic, but it does make them much safer than a random heater plugged into a wall outlet.
Thermostat location and frozen tanks
Most RV thermostats sit in the main living area. If someone warms that space with a space heater, the thermostat thinks the RV is cozy, so the furnace does not kick on much.
That means no hot furnace air gets pushed through the underbelly. Tanks and water lines then sit in the cold and can freeze while the living room feels fine.
Tank heaters
Most “tank heaters” are 12-volt pads about the size of a dinner plate. They work more like tank warmers than true heaters.
More effective options are 110-volt heating blankets for tanks, which only a few brands use, such as certain Jayco North Point options and standard setups on Pinnacle. Those are rare in the wider market.
If someone must use an electric heater because they are just trying to get by, smaller is safer. Units in the 400- to 750-watt range are still a risk but far less stressful on RV wiring. It is still important to keep other loads on that circuit as low as possible.
Moisture and dehumidifiers
Cold camping brings another silent enemy: moisture. In summer, roof air conditioners naturally pull humidity out of the air. When the furnace runs instead, that dehumidifying effect goes away.
The first sign is often foggy windows or water beading on the glass. That is just the tip of the iceberg. Every breath, every shower, every pot of boiling water adds moisture to the air.
Dual-pane windows do not fix this. They might show less visible condensation for a while, but they do nothing to reduce the amount of water in the air. A dehumidifier, or even more than one in larger RVs, is the proper tool.
Skirting: Blocking the cold below
Anyone who has seen “bridge may be icy” signs knows cold air hits both the top and bottom of a structure. An RV is the same way. Cold air under the rig steals heat fast.
Common skirting approaches include:
- Hay bales or OSB sheets. Cheap and common in rural areas, but they add a serious fire load around an already flammable RV.
- Foil style sheeting taped on with HVAC tape. Helps block wind, but the tape can leave ugly residue that is hard to remove later.
- Snap on thermal skirts. Thick fabric panels that attach to snaps or twist fasteners are screwed into the RV. They work well, but can run more than a thousand dollars and leave many new screw holes around the lower walls.
- Inflatable air skirts. Flexible tubes that pump up and wedge around the bottom of the RV. They store small and do not require drilling, but they often cost more than the snap-on systems.
Hearing from other owners who have tried these methods is helpful before spending that kind of money.
Propane: Get ready to burn through it
RV insulation is nothing like residential insulation. Claims such as R40 roofs are usually theoretical numbers, not true tested performance.
That means the furnace will work hard and chew through propane. A higher BTU furnace puts out more heat, but it also burns fuel faster, just like a bigger truck engine uses more gas.
Cold campers need a plan for steady propane access. That might mean tracking fill station hours and topping off before weekends or holidays so they are not stuck with empty bottles on a Sunday.
Water supply in freezing weather
Many parks shut off water once the frost line drops to protect their underground pipes. That can surprise people who expect to just hook up a hose and turn on a faucet.
In places where water is still available in winter, a heated water hose is almost a must to keep it from freezing. If the site also offers a full-time sewer hookup, a heated sleeve for the sewer hose can keep waste lines from freezing solid when it is buried in snow.
Insulation gaps and RV windows
Beyond the walls and roof, there are many small gaps that let cold pour in, such as doors, vents, skylights, and windows. Foam inserts, insulated vent covers, and similar products can help seal those spots. The nice side effect is that the same upgrades help keep cool air inside in summer.
The real weak link is the glass. Most laminated RV sidewalls land somewhere around R7 to R9. Common RV windows sit closer to R0.7. In simple terms, they act like big thermal holes in the wall.
Most “dual pane” RV windows are just two pieces of glass bonded together, with no gas fill and no air gap between them. They might crawl up to roughly R1, which is barely better. They do a great job of cutting noise from outside, but they are not serious insulation upgrades.
The rare exception is true European-style dual-pane RV windows. These have a real air space and a much higher R value, more than two-and-a-half times better than common bonded dual-pane windows. They usually appear on higher-end or specialty rigs.
Final thoughts on safer RV cold-weather camping
Cold-weather camping in an RV is tough on gear and people, but the biggest risks are usually fire, frozen plumbing, and hidden moisture. A basic plan that covers heat, humidity control, skirting, propane supply, water access, and insulation can keep many of those problems in check.
Cold weather will always win in the long run, but smart prep can give any RVer a fighting chance to stay safe, warm, and on the right side of repair bills.
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