Can I lay sod over my existing grass?

Answer: No
Explanation: It is not recommended to lay sod over existing grass, as the roots from the new sod will have a harder time establishing as there is less contact area for the roots. The new sod will completely cover the old sod, which will provide no benefit for the new sod and can lead to a less than desirable outcome. Further, water drainage capabilities will be reduced until the sod fully establishes.

Answer: No
Explanation: No. If you want a beautiful long lasting lawn. A sod removed or rototiller your existing lawn before laying new sod. Preparation is everything in new sod installs.

Answer: No
Explanation: It will grow through and add to the new sod grass. Plus the area for new sod should be refurbished with top soil.

Answer: No
Explanation: We wouldn’t recommend it. While it seems like a great idea, layering sod on top of existing turf isn’t likely to fare well. We can see why you’d think it could be a good strategy – like laying landscaping fabric, sod could starve existing grass for sunlight and effectively kill off the original layer. As professional turf layers we know that’s a recipe for a ruined lawn, for a variety of reasons. Turf needs to be able to grow roots quickly to become established after sod is laid. To do so, it needs additional soil. The original layer of grass will form a barrier that makes it difficult for roots to establish.

Answer: No
Explanation: The new grass never rooted. ... You can't simply lay sod on top of grass without doing proper preparation. “All sod must make soil contact to root,” she points out. “Therefore, the existing grass / lawn must be extremely sparse or you will have to bring in dirt and put it on top before laying the new sod

Answer: No
Explanation: The best way to get your new sod to take root is to lay it directly on fresh soil. Air pockets like those that would exist if you layed it directly atop of another piece of sod, would allow the soil to dry out and burn up.

Answer: No
Explanation: “All sod must make soil contact to root,” Therefore, the existing grass / lawn must be extremely sparse or you will have to bring in dirt and put it on top before laying the new sod. Additionally, the grade is extremely important; the water flow must be proper.

Answer: No
Explanation: You would need to kill the existing grass with round up and wait for two weeks or so, then till the area, add stater fertilizer and lay the sod.

Answer: No
Explanation: No the soil must be prepared properly before any sod is installed.

Answer: No
Explanation: Existing surfaces need to be removed first and the soil properly prepped and graded and I highly recommend installing an automatic irrigation system to guarantee the sod installation.