The steady-state (thermal resistance) and dynamic heat transmission characteristics of seven wall specimens were measured. The test specimens represented wall types ranging in construction from an insulated steel stud wall with stucco finish to an insulated concrete block wall with brick veneer finish. For all specimens, the measured frequency response compared quite well with the predicted frequency response. On the other hand, the measured thermal resistance varied from 45% to 90% of the predicted thermal resistance.KEYWORDS: heat flow, measuring, walls, thermal resistance.