Make any final adjustments prior to nailing. It is highly recommended to use our custom 4" galvanized "Small Head" turf nails (20D) and fasten every 6" to 12" inches along the perimeter edges 1" in from the outside edge of turf. When nailing, be sure to spread the turf away from the nail head so it doesn't trap any fibers. Additionally, add nails internally (around every paver) every 4"-6" on both sides 1" in from each edge, either aligned or alternating (see diagram below). Fluff or brush up the fibers around to cover the nail head, which should disappear in the thatch. 

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PRO TIP: We have tested every nail on the market and although some other nails can work in a pinch, most will leave a visible nail mark or divot and take a lot of extra effort to hide. This makes a world of difference when installing hundreds or thousands of nails for your project. A nail divot will trap a clump of sand and become highly visible throughout the grid. You should not be able to see any nail divots in a successful installation.