Ok, so I have decided to resod my lawn with St. Augustine. I have already applied Roundup and am waiting for everything to die off. My neighbor did this same process last year and decided to till his lawn before laying his sod (it does look good). From some general browsing here, you guys don't recommend tilling. I went to Home Depot and the guy there said I should use a sod cutter to get rid of the current dying grass. My dad says I don't have to till or use a sod cutter, but rather just lay the sod on the existing dead grass. Can you guys give some suggestions as to what is the best way to do this. Thanks.