Leveling concrete sub floor with sand?

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  #1  
Old 02-05-09, 06:41 PM
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Leveling concrete sub floor with sand?

Recently I purchased a 50 year old 2 story cape cod style house with an addition. Sub level is a concrete. The 50 year old portion seems pretty level and flat but the addition that was added by an obvious amateur contractor or owner has some flooring issues. A room 28x25 with carpet has its up's and down big time. I got a pretty good deal on the house due to this issue, but now I wanna remove the carpet and install hardwood or bamboo flooring. I went to my local flooring supplier and was told I could first use a fine sand to level the floor and place a plywood sub floor over the sand, then put a moisture barrier over the wood and then lay the new floor. I am a bit nervous and a little confused about this. Has anybody ever heard of this? I think the floor is so bad that leveling cement would not work due to how thick the mixture would be. Any ideas would be great. Thanks
 
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Old 02-05-09, 07:44 PM
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Just so there isn't any confusion, he said put down sand not sand floor.
 
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Old 02-07-09, 07:49 AM
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I'd stay away from plywood that isn't attached to the subfloor.

Use a self leveling floor float overlay designed to go over concrete. It comes in 50# bags and mixes like watery cement and can be applied up to 2" thick. Ardex is one manufacturer but there are many others.
You won't need plywood at all then.
 
  #4  
Old 02-10-09, 08:39 AM
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Sounds better than sand. Thanks
 
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