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Old 12-04-2010, 03:30 PM   #16
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Gluing plywood to concrete


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Originally Posted by GDiak View Post
Ok, but what is the best way to do this? Nobody has really told me !!!! Anybody that knows, please let me know !!
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Old 12-04-2010, 05:19 PM   #17
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Gluing plywood to concrete


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Found a few sites that may have a solution for you. I don't know if LL has a good enuff rep to be followed, but worth looking at.
http://video.bobvila.com/m/21320495/...r-concrete.htm

I wonder if you could just put the floating floor closed cell foam under some 3/4" plywood and nail the hardwood to that.

My house was built in 1937 and has some kinda tar and then some tile (looks like asbestos tile), the problem is that I've replaced some of the foundation and that's an area that I want hardwood over.

If these options don't work well, then what is the solution? (other than going with a floating enginered floor)
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Old 12-05-2010, 03:03 PM   #18
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Gluing plywood to concrete


Applying glue to slab or below grade concrete is a very bad idea. Concrete wicks up moisture from the earth around it, which will break down the adhesive bond. Additionally, this moisture will build up under the floor, causing the bamboo flooring to swell and buckle, and it will eventually develop mold, rot, mildew, and foul odors. It might take ten years, but it WILL happen.

You have three good options:

1. Install a plastic vapor barrier underneath the floor-- at least 10mil.
2. Install a plastic sub floor -- but don't use those tiles they sell at Home Depot -- the wood chips in it extend 1/4" beyond the tiles and has the same basic problems as wood on floor.
3. Use a concrete sealer to seal the floor, then add the floor as a floating floor. Don't use those waterproof paints, as they tend to flake and peel away.

Let me know if I can help with anything else.

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