Whenever you lay artificial turf on the AirDrain it’s the same principle as installing carpet. It is stretched and attached to the perimeter boarder, similar to carpet installation. The synthetic grass, typically has a 50-80 ounce polyurethane backer.
You will be adding between 1.5 – 3 lbs. of infill for ballast. Given that scenario, you’ll never feel what’s below the turf because the depth of the infill and the turf backer will not transfer down to the grid below the turf.
Since 2002, Airfield Systems has thousands of synthetic grass installs, to this date Airfield Systems has not received a call with a “gap” issue.
Remember AirDrain has up to a 20% reduction in GMAX on aggregate and 15% on cement, I’ll put that up against any 1″ pad in the industry and it’s rated at 233 psi.