Concrete Slab below 2nd Floor Bathroom Tile??


Old 03-01-11, 12:08 PM
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Join Date: Feb 2010
Location: US
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Concrete Slab below 2nd Floor Bathroom Tile??

I just started a bathroom renovation for a 2nd Floor Master bath and found a 3-4" slab of concrete below the original floor tiles and joists. Was this a common approach used on homes built in the 20's? I'm worried about the extra weight of the new bathroom if I leave it in place and also concerned about opening a can of worms if I remove it. Would you recommend I leave this slab in-place or start with a clean slate and rebuild the joists and sub-floor?
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Old 03-02-11, 07:08 AM
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Join Date: Jul 2008
Location: NY
Posts: 10,986
You're right about the worms & yes, it was common at one time. Leave it there.

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