Leveling concrete floor for laminate

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  #1  
Old 01-06-11, 10:40 AM
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Leveling concrete floor for laminate

I have a 12' x 30' basement room that has a uneven concrete floor. Approximately 1/2 of the length is level. The other 1/2 gradually drops 1 1/2" below level. What product should I use to bring this 12' x 15' area back to level?
 
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Old 01-06-11, 02:12 PM
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You can usually use self leveling cement up to 2" thick. It is not truly self leveling, but if you spread it around right, you an probably get it to within 1/8"th tolerance. Be sure to to add a cement adhesive to the floor.
 
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Old 01-08-11, 07:43 AM
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fyi

it doesn't need to be "level". it needs to be "flat"
 
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Old 01-17-11, 03:30 PM
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After using 22 bags of topping cement to bring the low side of the room even with the high side I'm left with a middle area that - when a string is stretched from one end to the other - is 1/2" lower at the lowest point. Today I mapped it from all corners with a string and marked a outline with chalk. I need to build up 90 SF of floor. Deepest point in middle is 1/2" edges are 1/8". I was looking at the self leveling product that sells for $30 a bag that covers 50 SF at 1/8" Any suggestions for a less expensive product? Should I continue with topping cement at $5/bag?
 
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Old 01-18-11, 05:59 PM
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topping cement is a poor bonding underlayment ,not approved for adhesive applications. for a floating floor should be fine .At the very least you must use a primer for the concrete. Keep in mind that could be problems down the road for another installation
 
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Old 02-09-11, 07:45 AM
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I used the self leveling compound cement in a small bathroom over radiant floor heat wires, I found it did not "level" very well. I think you could do just as well with a good concrete mixed a little loose and a long flat board or piece of metal to level it yourself. but listen to Bish80 and don't forget the bonding agent on the existing concrete!
 
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