Laminate underlay on 2nd floor

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  #1  
Old 04-11-07, 08:11 AM
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Laminate underlay on 2nd floor

Hey how's it goin?

Ok, I have done laminate on the 1st floor, blah blah blah...And I used the vapor/pad combo as the underlayment ontop of the cement.

Now, I am wanting to put laminate on the 2nd floor.

What underlayment do I used for the plywood floor? Which do I used?

-same as the cement - vapor/pad?
-just the pad stuff?
-just the vapor plastic?
-can I used roofing paper?

Help. thanks.
Joe
 
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  #2  
Old 04-11-07, 08:42 AM
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You install what the laminate manufacturer recommends for the type of subfloor you have. If upstairs subfloor is plywood, you will not need the vapor retarder. Each laminate manufacturer has its own specific recommendations for underlayments and installation.
 
  #3  
Old 04-24-10, 10:55 AM
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Sorry to digup a bit of an old post, but I have a related question. On a 2nd level plywood subfloor, would there be any harm in using the same padding/vapor barrier combo underlayment that is normally used on cement?

Is there a valid concern that the vapor barrier could trap moisture in the plywood (and lead to mold/mildew)? Thanks in advance!

Originally Posted by twelvepole View Post
You install what the laminate manufacturer recommends for the type of subfloor you have. If upstairs subfloor is plywood, you will not need the vapor retarder. Each laminate manufacturer has its own specific recommendations for underlayments and installation.
 
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