Customer has approx 3700 Sf grass area in backyard 2500 Sf is either dead, dirt or weeds. They fixed the reason for it's current state (Irrigation and poor maintenance). They want to have sod put in. All the sod I have installed in the past three years of business have either been a fresh install or I cut out the bad area, treat, level and sod. They want me to cut a few corners and save a few bucks. they want me to treat existing area with non selective and wait a week and sod on top of old. Anyone ever done it. The soil to sod contact should be good since most of the area is sand/dirt anyway. Just never did it that way and wondered what you would do.