I am installing a floating laminate wood floor on an 11th floor
concrete building. So therefore my subfloor is concrete. Most place
say to put a 6mil poly vapor barrier on top of the concrete. I can
understand this if you are in a house and you have water vapor seepage
from the foundation and the earth, but I am on the 11th flor of a
condo. Do I still need that vapor barrier???
The product I used was combination moisture barrier and foam. I would
think you would want the foam at least to help deaden the sound a bit.
Walking on laminate flooring with hard shoes is very noisy, not just
for the downstairs neighbor but also for yourself.
Check the manufacturer's website for recommendations and in your
special case you might even call them to get the answer.
Check your CC&R's to see if they allow hard flooring above the first
floor. Get the densest pad you can, it will help with the sound. And
put the 6 mil vapor barrier. Its cheap and you need it. Concrete is a
porous material. It will transmit water vapor whether its a slab on
grade or on the 11th floor. Now of course there will be much less
transmission in your situation, but it will still pull moisture from
the air and you don't need that on the bottom side of your laminate.
You can test the concrete floor with plastic taped down overnight. Check
for moisture the next day. I've been in lots of stuffy hotels where I am
sure there are moisture problems all the way up the building.
You probably don't _need_ the vapor barrier, but it can't hurt.
I just bought some "flooring membrane" called "Insonobois", made
by "Resisto" (www.resisto.ca) for use in our basement under
Looks almost like a plasticized paper, with a rubber layer impregnated
with rubber granules on the bottom. Most of the material is
recycled (probably old tires). The roll is quite heavy.
It's touted as both a vapor barrier, high sound insulation, and
deaden the noise from the floor.
I expect it to work really well, but it's going to be a week or
two before I get to the stage of the project to install it.
Something like that would probably be ideal.
The stuff ain't cheap tho. $67CDN for a roll of 35"x39'.
Chris Lewis, Una confibula non set est
It\'s not just anyone who gets a Starship Cruiser class named after them.
Not a vapor barrier, but most call for some sort of material under the
laminate. I used Mannington engineer wood. They have two types of underlay,
one for grade and below, the other for above grade, like yours.
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