Study of factors related not using Development of green Roof In reducing Islands thermal Metropolises Case of the city of Mashhad

Population growth and urbanization development and use of more than motor vehicle of the factors affecting the increase in temperature in The urban areas And cause the Thermal island On urban areas and the surrounding environment. And the effects of its important role in the quality of air. In other words, the value of land use Most of the land for Construction and down the green space. So that the use of green roof technology in large cities to improve the quality of the urban environment is an appropriate option. The applicable research and descriptive- analytical studies and using AHP technique in identifying obstacles expanding green roof has been Mashhad. In this regard, study Development fields green roof the main dimensions of the the expert opinions green roof development Identification, The result of which is to determine the main axis and the obstacles. Obstacles such as green roof cost compared to conventional roof, cheap energy, and research applications, Lack of economic feasibility projects with the people and Officials and lack of written laws and regulations in this regard to the development of green roof is Mashhad. Use the experience of other countries, Acquaint the Officials and people with advantages of green roofs, Infrastructure for the private sector and proposed solution for green roofs.