POLY HOUSES ARE USUALLY MADE FOR PROTECTED CULTIVATION .USUALLY UV STABILIZED FILM WITH 5 LAYER IS USED ,THE LIFE SPAN VARIES 3-5 YEARS, THE LIFE SPAN OF STRUCTURE USUALLY MADE FROM G.I PIPES IS ESTIMATED TO BE 15 YEARS,INSIDE THE POLY HOUSE DIFFUSED SUN LIGHT IS OBTAINED BEDS ARE PREPARED IN THE POLYHOUSE SOIL/SOIL LESS MEDIUM