I put in floor heat and have long floor drains under each vehicle.  I wanted the water to drop from vehicle and go under vehicle to drain.  I also put in black granite in to mix instead of normal rock and then ground down over 1/4 of surface.  Made it look nice and will last forever.  Pictures attached.

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(IMG_1932 (full).JPG)

(IMG_1922 (full).JPG)

(IMG_1114 (full).JPG)

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(IMG_1912 (full).JPG)

(IMG_1090b (full).JPG)

IMG_1934 (full).JPG (132KB - 11 downloads)

IMG_1932 (full).JPG (312KB - 9 downloads)

IMG_1922 (full).JPG (121KB - 9 downloads)

IMG_1114 (full).JPG (146KB - 11 downloads)

IMG_1112 (full).JPG (134KB - 10 downloads)

IMG_1912 (full).JPG (150KB - 10 downloads)

IMG_1090b (full).JPG (117KB - 11 downloads)