Humidity in RV Equals Mold

One of the first things we learned when we first started living full-time in our RV was how easily mold can develop in your rig. As previous part-time campers or half time campers visiting only the south-west, we had no idea about humidity in a motorhome.

Humidity in RV Equals MoldHumidity in RV equals mold in your closets, walls and damp smelly clothes!

Our first winter in Portland, OR volunteering for Champoeg State Recreational Area taught us a valuable lesson. If you have not spent a winter in the Willamette Valley of Oregon, you may not know that it rains every day. Between the rain outside and the need for heat inside the rig, our windows were constantly wet with condensation.

We were also using a Blue Flame heater, so the burning of propane also added to the inside humidity. This heater works great in dry climates, but can cause a major mess with moist climates if you don’t combat the problem. At the time, we were using DampRid in our closets and were able to keep our clothes dry. However, every day I had to wipe down the windows and ledges because of the condensation.

We also did all of the other things that are recommended for humidity in our rig.

  1. Opening windows a crack
  2. turn on bathroom fan
  3. Wipe down showers and bath area
  4. Turn on kitchen vent when cooking
  5. Minimize boiling water

Humidity in RV Equals MoldWe still continued to have a major window condensation problem during the cold months of a rainy winter. We did not realize how bad the humidity was until we sold the rig two years later. When we unpacked the under bed storage, we found mold on the wall and floor of the storage area. We knew we had to do something to protect our new 40 motorhome from the same problem.

Talking with other full-time RVers provided the answer. We purchased a small dehumidifier, plugged it in and the problem was solved. It had the added benefit of keeping our rig warmer because of the heat it generated when it was running. To our amazement, we emptied, at least, a gallon of water a day and sometimes 2 gallons. No wonder we had such a humidity problem. Just normal living in a small space created an amazing amount of water.

dehumidfierThere are several types of dehumidifiers, but because of the large amount of water that can be produced, we recommend a larger capacity model dehumidifier rather than the smaller thermo-electric type.

We sold our large motorhome in 2011 and downsized to first an R-Pod and now our 20 foot Lance trailer. Even living for just a few weeks at a time in the smaller rigs taught us that the same humidity problem exists. So in the winter we travel with our trusty Frigidaire dehumidifier. It sits in the shower and rides down the highway with no problems at all and we have a dry rig.

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