Basically, they are saying if a floor is sloping over a 1/2 to 1 inch in twenty feet then there is concern. Nearly all will say that if a floor slopes 1 and 1/2 inches in twenty feet or more, that there should be further investigation. Floors that slope 2 or 3 inches in 20 feet would be a very serious concern.Click to see full answer. Simply so, what is acceptable floor slope?The “Residential Construction Performance Guidelines for Professional Builders and Remodelers”, Third Edition, by the National Association of Home Builders allows that a floor should not slope more than 1/2″ in 20 feet. And, they further state that measurements should be made across the room, not in a small area.Subsequently, question is, can a sloping floor be fixed? Fixing a Sloping Floor Foundation specialists will repair any structural problems first, then use one of a few different techniques to mend your sloping floor. This might involve jacking up floor joists and installing supports, or it could require jacking up the whole house and installing new footers. Secondly, are sloping floors dangerous? Floors that dip in the middle are usually caused by non-structurally significant joist deflection, but sloped or tilted floors that are straight (i.e., slope in one direction) may indicate a more serious foundation or bearing wall problem. Some wall cracks can indicate evidence of an on going problem.What is the best flooring for an uneven floor?If your floor is less than perfect, your best flooring options are carpet, vinyl or linoleum. You might be able to get away with tiles, but you’ll have to use a floor leveling product or lots of mastic.

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