While artificial grass simplifies landscaping compared to real turf, installing synthetic lawn over an uneven concrete subsurface poses some unique challenges requiring careful prep. With a methodical approach, a seamless lush lawn can transform the most buckled patio.
Start by pressure washing the concrete and letting dry fully. Use a screed rake to distribute patching cement or self-leveling underlayment to fill divots or holes for flattening. Allow proper curing before synthetic grass application.
Sweep then firmly pressure wash again to degrease and degloss the slab for proper adhesive grip. Check for sharp raised edges to grind down. Fix cracked seams with concrete caulk and a sealer.
For persistent low spots, consider incorporating removable foam puzzle mats or sheets before turf rather than repeatedly leveling with cement. Interlocking mat edges secure together upon grass installation.
Prepare a porous crushed rock base in a fine layer to further stabilize and smooth the subsurface. Compact using a plate compactor before carefully cutting and laying the grass atop the base.
During turf installation, thoroughly glue all interior roll seams and perimeter edges with outdoor adhesive. Cement glue-down nails or sod staples boost hold. Allow all adhesive to fully cure before light foot traffic.
With attentive subsurface diagnostics and patching in preparation, even significantly uneven concrete can become a perfectly natural-looking synthetic lawn. Meticulous leveling provides the necessary flat underlayment.
