Cargo trailer issues?

[Rainier70]

Like PigCooker said, the better you vent the less chance there is for condensation anywhere. Condensation against the skin or on the ceiling is not likely to be any kind of a problem if you are proactive in venting, insulating, and sealing your inside walls. I kind of remember one person on here that was having condensation problems on their inside ceiling, but they hadn't insulated, and I don't think they had a vent either. I can't think of anyone else that has a condensation problem, because most insulate, seal, and vent. It is just something to be aware of as a possibility when you build.

One thing that really adds moisture to the inside is using an unvented propane heater like a Buddy Heater. You would really have to vent then..burning propane inside puts out a LOT of water.

[astrotrailer]

Before I added a real Atwood RV furnace with heat exchanger I would see the condisation building up from our breath the very cold interior in the colder months. With the furnace added that problem was resolved. I would also leave a window cracked because I wasn't worried about losing the heat. I put in 2 inches of insulation under the floor covered with FRP. I have 1 inch in the walls and 2 in the ceiling. We don't cook inside so the only moisture building up is from our breath. I live in a dry climate and have never driving my trailer in a rain storm. It just doesn't rain much in Nevada. I have 240 watts of solar on the roof and 225 amp-hours of batteries in the front box and a propane bottle on the outside front wall so I won't have a problem running the furnaces on a week long winter camping trip at Death Valley without using campground electricity. We don't camp at places with electricity because the campsites without them are better for astronomy.

My setup is minimal, just a 5x8 so I can tow it with a Highlander and still see around it with my regular mirrors. Gas millage is very good when towing. I use shelves for storage, not cabinets because shelves are lighter. The whole lower area of the trailer is used for cargo on the way to our astronomy site so I want an interior that doesn't interfere with the cargo hauling function. Once the gear is unloaded, we use the inside as a full size bed plus a desk. All our bags and stuff get off the floor and up on shelves so the floor supports the full size mattress.