This case study is conducted to develop strategies for designing improved internally insulated basement walls. The majority of houses in North America have been built with poorly designed basement walls with highly vapour permeable internal insulation. Conventional basemea
This case study is to develop strategies of using simplified analysis to determine hygrothermal crawl space conditions. In order to keep crawl spaces dry, the elimination of moisture gain from the ground, the control of crawl space temperature, the moderation of the crawl space RH by air exchanges with indoor air, and the removal of moisture by ventilation are possible approaches.
If a vapour barrier is placed on the ground, air exchange with indoor air and exterior air and the application of insulation can significantly control crawl space temperature. Crawl space humidity can be controlled by air exchange with the indoor and the exterior. Hence, the location of the insulation and the air exchange rates are important factors for the control of crawl space conditions.
In this case study, the effect of these factors on various systems of crawl space construction is investigated. A method of estimating crawl space conditions is established using the hygrothermal space balance method, developed from the principle of conservation of energy and mass. The method is applied to crawl spaces in Toronto and Vancouver, Canada.