Subfloor moisture


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Old 10-22-06, 02:21 PM
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Subfloor moisture

I am installing a subfloor in a breezway over an existing concrete floor. I new floor will be about 4" above the concrete slab. I am concerned about sealing out moisture from under my new floor. I was going to put plastic down before building the new floor, is this correct? What if I wanting to insulate the new floor? I live in Buffalo, NY. Thanks. Kevin
 
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Old 10-23-06, 07:05 AM
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You would definetly want to put down 3 ml plastic first on the concrete. You can insulate your floor as long as there will be an air space between the bottom of the insulation and the plastic. About 1" of space. Good Luck
 
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Old 10-25-06, 05:44 PM
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Thanks for the reply Jack. That is exactly what I was thinking of doing. Someone also suggested to me to lay down 15# felt paper, then 4 mil plastic. Not sure what felt paper would do for me, what do you think about this idea?
 
 

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