The Reason behind the Emergence and Spread of Deteriorated Fabrics

Old urban fabrics have always been major problems which have presented wider dimensions in recent decades. Various measures in old urban fabrics renewal in the world, including Iran, have resulted in unsuccessful or less successful consequences. Multiple questions such as "What is urban blight?" And "What does renewal of old urban fabric mean?" have been posed to researchers. Moreover, studies show that the procedures have failed to answer the needs of urban renewal of old fabrics.
The paper aims to challenge issues related to old urban blight and renewal and efforts in order to find answers to the posed questions. Having a critical approach toward old urban fabric and renewal of urban fabric, it is more explicit that no proper understanding old urban fabric renewal has been introduced yet.
The results of perennial researches presented in this paper explains that either the phenomena of urban blight and urban renewal program requires a change in method and approach from detailed thinking to  holistic thinking  to be usefully measured and known. In this regard, the "urban blight" phenomenon is very complex in terms of social, economic, political and social changes. "Renewal" as well as a program for preventing mitigating and restoring urban blight will efficiently been known in case it repairs damaged social and economic networks and restores interrupted currents .
Keywords: