How To Lay Down Sod Over Existing Lawn. The surface would be too lumpy and uneven for the gravel to be laid down properly and as the turf decomposes, the landscape fabric will get even bumpier. To install sod on an existing lawn, cut any existing grass low, and level out any holes or step dips in the yard.
The surface would be too lumpy and uneven for the gravel to be laid down properly and as the turf decomposes, the landscape fabric will get even bumpier. Lay down one section of sod at a time while keeping remaining sections in a cool, shady area until ready for planting. Water the sod every day until it takes root in the soil.
This quickly kills the already existing grass in much the same way that a brick left on a lawn kills the grass beneath it.
Trying to lay sod over existing grass leads to drying and dead roots as the new layer struggles to reach the soil below. After you remove the top layer,you'll need to bring in topsoil and grade. Keep off the sod during installation. Once that’s done, mix some black garden soil in with your existing soil.