Concrete sealer Bostik MVP vs. roofing felt


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Old 03-13-07, 09:27 AM
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Concrete sealer Bostik MVP vs. roofing felt

I plan to install engineered hardwood flooring on our basement floor. The house had a slight moist smell when we moved in, but no evidence of moisture damage. A dehumidifier eliminated the smell. I haven't lifted the carpet yet to do a moisture test, but suspect it might fail. I have heard of using Bostik MVP to seal the concrete. I have also heard of putting down two layers of roofing felt sealed with mastik between each layer. Does anyone have experience with any of these products?
 
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Old 03-14-07, 05:01 PM
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You really need to be aware of moisture issues in a basement.

I don't have a basement but I use #15 roofing paper. Depending on the slab moisture content you may or may not want to use the roofing mastic. Personally in my home, I put down a 1/8" layer of roofing mastic directly to the concrete and then embedded the #15 paper into the mastic as I went.

This was under 3/4" kiln dried CDX plywood and 3/4" solid hardwood was nailed into that, so I really have no plan of removing the subfloor ever. As mentioned I would not do this type of install in a basement but the slab prep can be handled in a similar fashion.
 
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Old 03-14-07, 09:30 PM
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I highly suggest a floating installation, only if the concrete passes the moisture VAPOR test.
 
 

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