I have a previous customer that is wanting his front yard sodded. The problem is the two nice size trees and their roots. How do you guys deal with these? If i add a few inches of top soil and then till I will hit these roots. Some are several inches thick and will tear up tiller. The customer just wants topsoil laid out and then sod on top. If I add two/three inches of topsoil and then sod there may be issues with the irrigation heads. Thanks, for replies.