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Old 06-04-2008, 12:28 PM   #1
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Deffinition of a floating slab


I am searching for an accurate definition of a floating slab and the benifits of having one
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Old 06-04-2008, 12:52 PM   #2
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Deffinition of a floating slab


What are you building? Since you want an accurate definition the specific use and conditions permit similare slabs that are not exactly "floating", but are generally called floating.

A true "floating slab" example would be a garage slab the is poured between stem walls. It is not attached to the stem walls and is supported by the compacted soil beneath it.

The advantages are less of a tendancy to crack since the edges are not tied and the thickness and reinforcement can be less that a typical structural slab.

A basement floor is very similar, but not exactly the same. Much thicker slabs like slab foundations and post-teneioned slabs are also similar, since the soil supports the slab.
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Old 06-04-2008, 01:14 PM   #3
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Deffinition of a floating slab


Lets use the true definition, would a product that is 3/8" thick continuous vapor barrier acting as a cushion like thin foam products now being used under wood floors have a benefit? The product is called Slab shield.
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Old 06-04-2008, 01:50 PM   #4
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Deffinition of a floating slab


You would have to check with the flooring manufacturer to see that the requirements are the materials to use under a wood floor. This will affect any flooring material guarantees.

The term "vapor barrier", which is more correctly referred to as a "vapor retarder" depends on the material AND the thickness.
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Old 06-04-2008, 02:11 PM   #5
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Deffinition of a floating slab


I apologize I didn't phrase my question clearly. The question is using the flexible foam product under concrete. I know that improves cure time, radon and termite barriers.
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