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Old 10-11-2008, 10:23 PM   #1
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recommended subflooring for hardwood on concrete slab

We have built an addition to our home and a looking for information about installing hardwood flooring on a concrete slab. The slab meets minimum code requirements and the room is a three season room. (We live in the midwest.)
What kind of subflooring should be installed under 3/4" red oak?


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Old 10-13-2008, 11:04 AM   #2
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Someone will chime in on the answer for 3/4 oak.
But why not float an engineered product?


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Old 10-23-2008, 12:17 AM   #3
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hardwood over concrete

I floated an engineered hardwood over concrete slab using Floormuffler underlayment, which acts as both a sound deadener and a moisture
barrier. Came out great.
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Old 10-23-2008, 08:11 AM   #4
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You'll have to get plywood under it...No alternative. You can't lay plywood right on your concrete slab, so it'll have to be furred up on sleepers.

Bad idea if you ask me...Just asking for moisture issues with the floor and the substrate. I'd look at a floating engineered floor if it were me.
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Old 10-25-2008, 05:58 AM   #5
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I have been looking at Junckers hardwood flooring - floating installation and can be done over a concrete slab.

Also looking at putting Floor Muffler under it for the underlayment.

Last edited by vsheetz; 11-27-2008 at 02:56 PM.
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Old 10-26-2008, 05:15 PM   #6
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I used a product called DriCor which allows any water that penetrates the basement to run to the floor drain. Adds about $1-80 per square foot to your costs. Its easy to lay, but slightly time-consuming. I can recommend it. You can also build internal walls directly over the top of it. It also allowed me to run network and speaker cables underneath it.


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