Well I am getting ready to install a real maple wood floor, and its going to cost me alot of money so I want it done right. My problem is this: My living room is 12x20 and has a 1.5inch down slope over a 12 ft span. The 20 foot lengths are level front to back but accross the 12ft span of the room the slab drops 1.5inches. I have been told this will take roughly 12 fifty lb bags of self leveling compound to fix. I have also been told to call a concrete refinisher, as well as glue some ply down and self level over that to take up some of the room. What is the best way to do this. Is 12 bags of SLC to much? The flooring guy wanted $1100 dollars to level it out. What should I do?