No camper on the market is free of heat transfer and condensation dew point management.
When you seal out the weather, you also seal in the interior “weather” and the evaporated moisture in the air (humidity). When the temperature of surfaces and the dew point (relative humidity and temperature to which air becomes saturated with water vapor that forms dew) are within 2 degrees Celsius, condensation will appear.
The goal is to reduce the dew point by removing moisture from the air and/or increasing the temperature of surfaces and preventing cold spots with airflow circulation.
DE-HUMIDIFICATION: In a closed and well-sealed camper, without proper airflow, heating, and exhausting of moisture-laden air from showers, cooking, and washing dishes, as well as traveling or living in a high-humidity climate zone, will cause condensation issues inside the camper. Excess moisture is a problem, even under the best of circumstances. In shower areas, it is a must to have an exhaust fan. Cooking areas should also be hooded if possible and have an exhaust port to the outside. Living in the camper full-time or storage of the campers do well with a dehumidifier. Preventing the cold exterior from reaching the interior is also key.
Globe Trekker’s thermal break aluminum extrusions and high R-value structural insulated panels do a lot to mitigate condensation issues, but it will not prevent it ever from occurring. Remember, raising the temperature of surface areas with adequate heating, preventing cold spots with proper circulation of airflow and dehumidifying the moisture-laden air are steps you must take for prevention.