Abstract: This invention is directed to facilities for storing food in a controlled atmosphere wherein the temperature is regulated and the relative humidity is regulated. An important element in achieving a controlled atmosphere for the storage of food is the storage building. If the storage building is, properly, designed and constructed so as to provide a vapor barrier and also to provide thermal insulation, the storing of the food is made easier for realizing a desirable stored product. With the combination of a vapor barrier and also thermal insulation, there is less possibility of condensation of moisture in the storage building.