Heat losses from buildings occur to a great extent through external walls. As compared to other types of buildings detached houses have fewer stories constructed in open places with less environmental shelter against wind. In urban and rural settlements, the wind effect on houses with roof remains as an important subject of study. More specifically, the role of roof as an insulator and the effect of roof on forced convection from buildings need to be considered in this context. In this study, we have investigated the potentials of roofs for reducing the wind effect on the detached houses during winter months in Kayseri. a midsize city in Turkey located at 38.44 degrees N and 35.29 degrees W Turkey.