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Old 03-05-2010, 02:04 PM   #1
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Insulation


When building a floor on top of a cement slab, can the insulation lay directly on the cement or does it need to be suspended in the air?

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Old 03-08-2010, 07:38 PM   #2
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Insulation


What type of floor and what type of insulation?
Laminate floors can go over concrete with a vapor barrier and good insulation/ cushion made for laminate floors- normally no thicker than 3/16".
If you are building a full floor with 12" joists or tgi's and a 3/4" plywood or OSB subfloor over them 24-36" of airspace is required and the airspace should be ventilated. Your local building codes and where you live have a little to do with it as well.

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