Artwork by Jan Jamison
Trailers, fifth wheels, and motorhomes, all have a couple of things in common. Eventually you will come across moisture on the inside windows, walls, ceiling or floor. If it is moisture that has gotten inside because of a leak in the roof or windows, then once the problem has been identified, the corrective measures can be taken. However, sometimes you can get moisture inside that is not caused by a leak, or from cooking.
We have to remember some of our school science and what can cause moisture. A difference in temperatures may cause moisture to appear if the conditions are right. After a cool moist evening, the sun starts to come up, and the outside walls of the RV begin to warm, but the inside walls and cupboards are still cool. The temperature difference combined with the relative humidity inside the unit can cause condensation to form. It can be particularly bad if you have something up against the inside of the wall, such as the non-porous computer briefcase, or a map book that has a plastic cover on it. Anything that cannot breathe will allow moisture to form between it and the wall. Over time dry rot damage can occur. If you are not using your RV regularly then it is even worse, because there is very little air circulation inside the RV, and without air circulation the moisture has no where to go.
This type of condition can also cause a musty smell to slowly develop, so if you don?t see the condition, then over time you will begin to smell it.