Does Floor Muffler underlayment need a vapor barrier in a basement?


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Old 10-07-08, 06:14 AM
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Does Floor Muffler underlayment need a vapor barrier in a basement?

I am installing a WilsonArt laminate floor in my basement (on a concrete slab). I will be using Floor Muffler underlayment. Should I also use a 6 mil poly as a vapor barrier?

Also, does the Floor Muffler get laid edge to edge, or overlapping edges?

Thanks,
Guy
 
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Old 10-07-08, 02:59 PM
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Floor Muffler is an acoustic layer and moisture barrier in one. No need to add the 6 mil poly too.

Butt the seams together(no overlapping) and use 2" wide duct tape to tape the seams together.
 
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Old 10-07-08, 09:22 PM
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In a basement, I would still use at least a 6-mil plastic moisture barrier.
 
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Old 10-08-08, 09:10 AM
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Floor Muffler has the same perm rating as 6 mil poly. It sure wouldn't hurt anything the double up on the moisture barrier if you wanted to though.
 
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Old 10-08-08, 07:47 PM
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I don't trust those 2-n-1 cushions. Seen them fail.
 
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Old 10-09-08, 03:56 AM
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Originally Posted by Carpets Done Wright
I don't trust those 2-n-1 cushions. Seen them fail.
Is Floor Muffler considered 2-in-1 or 3-in-1?


Also, if I use the 6 mil poly, should I use duct tape or clear plastic packing tape for the seams? And, if I use the poly, should I still tape the seams of the Floor Muffler with duct tape?
 
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Old 10-09-08, 07:05 AM
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Overlap and tape the seams with clear packing tape.

If the floor muffler is a moisture barrier also, it should have a peel & stick overlapping edge. If it doen't, the clear packing tape is the right thing to use to seal the moisture vapors out. Vapors cannot be seen. It is not liquid moisture.
 
 

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