Further, the thickness of the profiled sheet — the thicker the material, the greater the weight of the profiled sheet. But the reliability and bearing characteristics also «go uphill». Here it should be proceeded from the principle of optimality: half a million thickness for the roof of a private low -rise building is quite enough. And for the fence — and even more so, the neighbor has no tank! In general, the range from 0.4 to 0.6 millimeters is optimal for private construction.