Bangladesh traditional houses was a good representative of warm humid tropical houses that can well-adapt to local climate and well collaborate with a local believe and tradition as well as local materials. Highly dense worst surrounding condition of Dhaka city have impact to the quality of indoor and outdoor climate, it influence to the thermal comfort in the traditional house. The question is how Bangladesh traditional house can contribute in providing the thermal comfort in a dense environment. This report aims to investigate the thermal performance in Bangladesh traditional house roof section in the context of an uncomfortable dense environment of Dhaka city Bangladesh traditional house is a typical example of dwelling which encapsulates the socio-cultural values of the country and traditional form.