Install sports artificial grass like football field need professional workers and tools, to meet the standard requirement. Shockpad recommend install at first before unroll the turf on the ground. HomeGrass offer onsite installation service and here is installation guide for reference. Some of those tools/materials include:
Knife Seam tape Adhesive

1. Array the shockpads on the ground

2. Glue at intervals

3. Upper seam tape

4. Unroll the grass onto the shockpad