ᐅ Insulation in a Construction Trailer: Vapor Retarder Yes or No?
Created on: 29 Dec 2019 17:28
C
cube_maniac
Hello building community,
I recently acquired a construction trailer and now want to convert it into living space.
To keep it from getting too cold in winter, I plan to insulate the trailer with 5 cm (2 inches) of polystyrene foam. Heating will be provided by a wood stove and an electric frost guard. The trailer has an outer shell made of metal, which acts as an exterior vapor barrier.
Now I am wondering if I should also install a vapor barrier on the inside of the insulation. My concern is that moisture might still accumulate in the cavity and then become trapped.
Does anyone have experience with this kind of wall assembly? What would you recommend?
I recently acquired a construction trailer and now want to convert it into living space.
To keep it from getting too cold in winter, I plan to insulate the trailer with 5 cm (2 inches) of polystyrene foam. Heating will be provided by a wood stove and an electric frost guard. The trailer has an outer shell made of metal, which acts as an exterior vapor barrier.
Now I am wondering if I should also install a vapor barrier on the inside of the insulation. My concern is that moisture might still accumulate in the cavity and then become trapped.
Does anyone have experience with this kind of wall assembly? What would you recommend?
F
FamilieBausS13 Apr 2020 22:10Hello, such a camper can be very well insulated with XPS or self-adhesive Xtreme Insulator. Vapor barriers are not installed in this case. For cost reasons, I would glue and seal XPS directly and tightly from the inside with Würth adhesive. This method has been used for decades to make caravans winterproof from the factory. We use our caravan in the Alps during winter. Minus 25°C (minus 13°F) is absolutely no problem. Important factors are mechanical ventilation and ventilated furniture construction, as well as a warm-air heating system that distributes heat all around through a duct. Using only a stove can cause dampness in the corners.
