The pad is in 6 sections and is heaved in the center from our PA climate changes. I didn't take any elevation shots, but can visually see the differences in height. I have about 6" to the finished surface of their covered concrete porch. I have seen others put pavers over concrete, but I wouldn't feel comfortable with the results over time. I don't know the install procedure over concrete (base stone & sand or just sand?) the only drainage they have are gutters on the roof that exits on the driveway. No exact amount was given for the budget. I said I would gather some ideas and present them with a dollar amount.