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Old 09-19-2010, 05:14 PM   #1
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Cork under laminate

Purchasing the laminate from Costco for 2 bedrooms. One of the bedrooms is over a garage and I would like to add a cork underlayment to help deaden the sound from the garage. We put this down when we put in a cork floating floor and just lay 2x3 pieces. Can this be done or is it overkill since the laminate already is padded. Also the instructions for the harmonics wants a vapor barrier. Why? It's on the second floor, so is that really necessary also.
Thanks for your help!


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Old 09-20-2010, 12:00 PM   #2
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I really like cork, But I like it as a finished floor and me it sounds over kill...I would think you would do better by putting accoustacal tiles on the garage ceiling....This is only my opinion, but one concern maybe having too much cushion underneath the laminate....also maybe look into an alternative method for suspending you door opener...


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Last edited by Aaroncarpet; 09-20-2010 at 12:02 PM.
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Old 09-20-2010, 12:54 PM   #3
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Maybe I was unclear. The garage under this room is completely finished. The ceiling is already drywalled with insulation. The house was built like this. We are replacing carpet. Was just wondering if we could add more soundproofing by adding a layer of cork between the laminate and subfloor. We did this in another room but the floor did not have a preattached pad, the one we are now looking at does.
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Old 09-20-2010, 01:48 PM   #4
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If you are guarding against airborne noise, then a pad / cork / rubber isn't advised since it creates it's own resonance. Any compressible layer will do this in between rigid surfaces (the subfloor and the engineered floor. If you are worried about airborne sound, rather than impact (footfall) noise, then simply add mass like plywood, and damp with a damping compound.

If you have impact noise from footfall, then this compressible layer is a necessary evil. Cork isn't used as much these days as it is an organic material susceptible to mold. It's also quite thin, and any thin underlayment won't work as well as a thicker one.
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