I was asked for an estimate for sod installation. This would be my first. The area is 1700 square feet of extremely thin turf... mostly dirt showing. My questions: Does this area need to be tilled or harley raked if adding a couple of inches of soil? How long should it take to lay the sod once the area is prepped? Thanks! ps... If anyone from the Maryland area knows the price of sod and going rate for install.. would appreciate the info.