This study aimed to identify the potential of Concrete Block Houses with Cavity Walls from three main perspectives—design, environmental performance, and adaptive lifestyle—and to explore how their principles and technologies can be applied to contemporary housing.
　In terms of design, it was confirmed that only a limited number of architects currently work with this construction method, and that it requires a relatively large workforce for construction. Environmentally, measures such as using spray polyurethane foam were taken to ensure airtightness, compensating for the porous nature of concrete blocks. Thermal environment measurements showed that indoor temperatures declined slowly after heating was turned off in winter, demonstrating the house’s high thermal storage capacity. Interviews with residents revealed unique adaptive lifestyles, including night purge in summer, intermittent heating in winter, and adjustments to heating settings based on weather forecasts. Experiences of discomfort also served as triggers for residents to develop more suitable ways of living in the house.
　Furthermore, a simulation using a simplified thermal network model showed that replacing gypsum board with wood wool cement board as an interior finish could slightly reduce heating loads, suggesting its potential as a viable material for modern applications.
　In summary, this study demonstrated that the environmental features and knowledge embodied in Concrete Block Houses with Cavity Walls can be effectively implemented in modern housing. The findings contribute to preserving and continuing Hokkaido’s unique architectural culture.