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Old 09-17-2008, 06:29 PM   #16
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concrete floor...the pits!


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I am curious for my future reference, What can you use over concrete as a underlayment? I've never put anything other than carpet or VCT down in a basement and never used an underlayment. But if I was installing a floor that required a sub floor, what would I use if I could not use Lauan?

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Old 09-17-2008, 09:50 PM   #17
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concrete floor...the pits!


ok, so I'll forget the "muriatic acid"! I cleaned it by hand. big machines do create dust etc. and that won't do since I just painted the walls. (shoulda waited,huh) now to fill the pits...

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Old 09-20-2008, 01:38 PM   #18
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concrete floor...the pits!


so I cleaned the floor (by hand,very labor intensive!) and patched those "pits" with Planipatch and "durn it", that stuff is like "mud" (you know,wall compound") when you patch a nail hole. it looks fine when it's wet,nice and smooth,but when it's dry it shrinks leaving a nice "dimple". I sanded and went over it again,trying for a smooth patch, but when it was dry, dimples again! what do you do,keep going over it until it's perfectly smooth? don't you want a perfectly smooth surface for the tiles? will the primer fill those dimples? hey Nestor!

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Old 09-21-2008, 03:02 PM   #19
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concrete floor...the pits!


While you are on that subject of subfloors, I was wondering if you could
use hardibacker set in thinset over a concrete floor or wonder board.
I need to bring a concrete up to the terrazzo level for wood flooring
to be glued down
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Old 09-21-2008, 03:12 PM   #20
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concrete floor...the pits!


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Originally Posted by therugdummy View Post
While you are on that subject of subfloors, I was wondering if you could
use hardibacker set in thinset over a concrete floor or wonder board.
I need to bring a concrete up to the terrazzo level for wood flooring
to be glued down
You need to post your question in a new thread. That way people will see it and you'll get the answers you need.

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