Abstract
SF roof (a sloping roof combined with a flat roof) is a special kind of roof existed in the Ningqiang region. SF roof isdesigned by local residents according to their experience of life. Based on experimental test, this paper discussed such roof and normal flat roofs of rural houses in the Ningqiang region of west China. It can be found that, comparing with the flat roofs, SF roof with a heat insulation transformation has better thermal insulation performance in the research region. Testing process of the research is introduced, results of the testing are discussed and conclusions are provided.