I just bought a new house. During the final walkthrough I pointed out to the constructor that there was a noticeable bulge or rise underneath the vinyl floor close to the sliding glass door (high traffic area). And to make a long story short, the builder says the industry standard for slope of a concrete slab or flooring is 1/4 inch for every 10 feet. My question is, what is the *true* industry standard? I can agree with this if the slope is gradual but ours is more of a ridge. If you measure 10 feet, 9 1/2 feet of it is level, but the other half foot is not even close. I'm worried that this will cause some problem to my vinyl flooring or even wood or marble flooring if I decide to upgrade in the future. Plus it just doesn't look or feel right. Do you think I have a good argument for them to fix this? It would probably involve grinding/sanding of the slab or some similiar messy fix.