The sod compresses the grass and limits its exposure to sunlight and water.
Installing sod over existing lawn. Can you lay sod over existing grass?. If your town has a compost center, spread 2 inches of finished compost for free. This is because when the new sod is laid on.
The answer is usually no. In my area we soak sod we keep it soak if u let it dry out it will curl and shrink. Fresh sod won’t be able to reach the soil in order to grow roots.
Add a layer of topsoil on top of existing grass to ensure root contact. Before installing your new sod, you should moisten the soil using a hose or sprinkler. Installing sod over existing lawn will cause the grass to form a layer between the soil and your sod.
Worry less about the little spaces between the. Leaving a layer of grass underneath your new sod prevents it from taking root and increases the chance that the new lawn will die from lack of nutrients and moisture. The additional organic matter and the labor.
How to prepare the soil for planting. Remove old sod with a sod cutter to expose soil. Start a new roll immediately where the roll finished.
Though it is generally thought to be ok to lay sod over an existing lawn, some landscapers and homeowners prefer to remove any existing lawn before installation of sod. Lay a sod at one end of your lawn and start to unroll it from the other side. Once the vegetation is removed, take a landscape rake or hoe and loosen the top 2 or 3 inches of soil.