We just had a paver technooc patio installed that is 26 feet long by 20 feet wide. It is built right next to the house length wise. The patio drops about 7 inches in 26 feet. This comes out to a little bit more than a quarter inch per foot if my math is right. It feels a bit tilted to us. Is this standard or acceptable for a pavered patio? The patio has a retaining wall and 2 drains on the lower side of the patio. The project is finished and it would be a lot of work to redo the slope. Do I have any grounds on asking the contractor to redo it or is the slope fine? Contract did not specify the slope.