I'm considering buying a house that has a semi new basement. They've put 2 totally new block walls in and blocked in front of the other 2 existing walls. They also hired a waterproofer to waterproof the basement. They appear to have at least put drains in from the outside walls, under the floor and into the basement. When I went to look at the house, all 4 walls were damp at the floor level. The property has not been graded, and there is a decidedly sunken area at one spot. the gutters are all full of tree stuff and one of the downspout areas has nothing but broken cement chunks under it. So, my question is, does it seem likely that cleaning the gutters, backfilling and getting the cement chunks out will likely solve the water problem? The waterproofer says its under warrantee and that they will fix it, but if it cant be fixed, that's no reassurance. Any advice would be appreciated.