The use of a two by four exterior wall building in extreme northern Minnesota for the bathhouse construction project is a departure from the typical construction practice in the region, which often involves using two by six construction. However, the two by four construction is being supplemented with exterior continuous insulation to enhance the energy performance of the building. This combination of insulation materials and methods will result in a highly energy-efficient structure with a significantly reduced heating load. The air sealing measures, such as tape connections and sealing with a vapor barrier on the ceiling, further contribute to the overall energy efficiency and airtightness of the building. The goal is to achieve less than one air change per hour at a test pressure of 50 pascals, which exceeds the code minimum requirement of three air changes per hour. These building practices not only improve energy performance but also enhance the overall durability and comfort of the structure.