Standing seam as flat roofing

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In the picture above, we have a cross-section of a typical 180 standing seam, a 90 standing seam, and an uncoupled panel.  At leska, we only use the 180 seams on roofs;  they're stronger and more watertight.   

As you can see from the cross-section, each panel, on flat surface looks like a cross section of a bucket would;  even if water builds up a little bit the roof wont leak!  This makes standing seam metal a perfect flat roofing material.  It can be used on incredibly low-slope roofs!