Patent ID: 7273642

Claim:
A unit for a modular synthetic grass turf assembly comprising a base sheet adapted to be flat on a support surface, and a synthetic grass system laid on top of the base sheet and provided in sections sized to fit on the base sheet, said synthetic grass system including at least a sheet backing, a plurality of synthetic ribbons extending upward there from and an infill layer of particulate material disposed interstitially between said synthetic ribbons on said sheet backing, said unit including a flexible edge border upwardly extending therefrom around a perimeter thereof for retaining the infill layer in the unit, said base sheet having at least one drainage aperture extending there through, wherein the base sheet is capable of being fit side by side with respect to a base sheet of another such adjacent unit to provide a substantially flat and substantially continuous synthetic grass surface, wherein the flexible edge border extends substantially equal to or less than the level of the infill layer.