We are purchasing a home with what is referred to as Arizona landscaping aka rock. The rock is approximately 1" pieces. Would it be feasible to install over the layer of rock for added drainage? Or would it destroy the backing?

When installing our Pet Turf, we recommend installing it on a flat, hard surface. Typically you would install this over compacted crushed granite. This will help with drainage and also keep from destroying your turf when installed. So for this particular install, we would recommend removing the larger rocks before installing our Pet Turf Rolls or any other artificial grass rolls.