RV Moisture Control

Living in an RV requires attending to certain tasks that permanent foundation houses do not require. One such task is to keep the air moisture level low enough to avoid condensation. Moisture control is easily accomplished with roof vents and a dehumidifier, and just as easily forgotten. Condensation occurs when the warm, moist, interior air of the RV comes into contact with a cool surface. Not only can it happen on the windows and mirrors, but the interior walls of the RV as well. It’s well known that winter condensation problems can be both annoying and detrimental to your RV over time. Windows full of condensation leak water that can delaminate fiberglass, rust metal frame work, rot wood structure, and ruin wall board and wall coverings. Moisture in the air comes from a variety of sources. Cooking, bathing, washing dishes, and the moisture in our breath are just a few. The trick to minimizing condensation is to eliminate or reduce the moisture from the air. Here are a few tips to minimize condensation:

Allow excess moisture to escape to the outside when bathing, washing dishes, hair drying, laundering, and using appliances and non-vented gas burners.

Always use the vent hood when cooking.

Keep the bathroom door closed and the vent or window open when bathing and for a period of time after you have finished.

Do not hang wet clothes in the vehicle to dry.

In hot weather, start the air conditioner early as it removes excess humidity from the air while lowering the temperature.

Keep the temperature as reasonably cool during cold weather as possible. The warmer the vehicle, the more cold exterior temperatures and warm interior temperatures will collide on wall surfaces, thus creating condensation.

Use a fan to keep air circulating inside the vehicle so condensation and mildew cannot form in dead air spaces. Allow air to circulate inside closets and cabinets (leave doors partially open). Please keep in mind that a closed cabinet full of stored goods prevents circulation and allows the exterior temperature to cause condensation.

The natural tendency would be to close the vehicle tightly during cold weather. This will actually compound the problem. Simply put, you need to remove some of the warm air, and allow some cool air to get inside the vehicle, so the furnace will not recycle humid interior air.

Use fluorescent ceiling lights and minimize prolonged use of the incandescent lights, which produce heat and contribute to condensation in the roof above the ceiling lights. In extremely humid conditions the use of a dehumidifier can be most helpful.

For more tips about RV maintenance and service, contact Mike at mikeb@rvglass.com

or call (800) 551-9149 ext. 2030