Light steel aplication as a fabric roof that more popular at the present time. Almost of the schol bulding, office, hospital, worship place, housing in the big city in indonesia have already use light steel. Moreover it can be easily, speed installation is more be appeal, it is an alternative as a wood subtitute that more expensive and hard to get. Colllecting the necessary data in this research conducted by interview to Mr Azad as a host and his workers who install the light steel to his house. After that do this analysis data about the material price, compare it between using light steel with sadle shape and pyramid shape in different roof. The result in is the sadle shape is more cheap than pyramid shape using the concrete roof. The comparison of light steel in the saddle shape and pyramid shape with variation of covering roof is in the installation’s cost with the same light steel and decortion but different roof. The pyramid shape using metal roof, the cost is 10.936.000 rupias, while using concrete roof is 13.460.000, , using ceramic roof is 13.684.000. if the saddle shape using metal roof, the cost is 10.337.000,, using concrete roof is 12.049.800,. using ceramic roof is 12.273.800. it means that the saddle shape of light steel using concrete roof is most 
Keywords : light steel, roof, saddle shape, pyramid shape.