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Old 04-14-2008, 01:17 PM   #1
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Crack in Concrete/Engineered floor


We are installing engineered hardwoods over a concrete slab on our main floor. However, there is a crack in the concrete approximately 1/16-2/16 in wide. It appears that the floor settled on one side of the crack and it now slopes towards the outside wall. This causes a drop of about 3/16-1/4 in drop over 6 feet. (The concrete on the other side of the crack is perfectly level.) According to the instructions on our hardwood floors, this is too large of a drop...so this has to be fixed somehow. My husband wants to get a concrete sander, and attempt to sand away at the crack, but that sounds like a ridiculous amount of work. Couldn't we just fill in crack and gradually slope it towards the outside wall?

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Old 04-14-2008, 05:45 PM   #2
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Crack in Concrete/Engineered floor


How old is this slab?

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Old 04-14-2008, 06:04 PM   #3
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Crack in Concrete/Engineered floor


It's 12 years old.
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Old 04-14-2008, 06:44 PM   #4
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Crack in Concrete/Engineered floor


It can be done for sure.

You may want to hire this one out to a pro though
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Old 04-14-2008, 07:17 PM   #5
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Crack in Concrete/Engineered floor


Do you mean you can "do it for sure" by sanding it or just sealing it?
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Old 04-15-2008, 05:40 AM   #6
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Crack in Concrete/Engineered floor


No sanding it is unhealthy and a bad idea. Besides its more of a grind than a sand.

Feathering it out or using self levelling patch is the way to go
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Old 04-15-2008, 07:25 AM   #7
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What would be the best product to use?
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Old 04-15-2008, 01:42 PM   #8
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I would use a Portland cement based "Self-Leveling" compound
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Old 04-15-2008, 01:44 PM   #9
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all u do is mix it up with a latex/water mixture and use a small trowl to spread it out alittle then it will level it self. (Follow instructions closely)
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Old 04-15-2008, 07:11 PM   #10
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I agree. How long is the crack?
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Old 04-15-2008, 07:32 PM   #11
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Crack in Concrete/Engineered floor


Is this a living crack or is it dormant?
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Old 04-15-2008, 09:23 PM   #12
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Crack in Concrete/Engineered floor


My guess is that it is old. I would say the crack is approximately 8-10' long.
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Old 04-15-2008, 09:58 PM   #13
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Quote:
My guess is that it is old.
Yow maybe! But does it move with the seasons is the question?
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Old 04-15-2008, 10:09 PM   #14
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There is no way to know for sure. We bought the house 2 weeks ago, and the previous owner had the original carpet.
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Old 04-15-2008, 10:12 PM   #15
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Crack in Concrete/Engineered floor


Since the house is on a 3' deep slab, we aren't worried about any structural issues from a 1/16" crack. We have decided to just seal it up and put down the new flooring...which is what the house inspector told us to do with other tiny cracks.

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