Dropping a floor


Old 08-01-05, 10:37 PM
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Dropping a floor

I plan on replacing a tile floor which was damaged after a pipe burst in our house. I am bothered that the file sticks up about 1/2" higher than the floor in the hall way. So I was considering dropping the floor by taking one layer of subfloor out and putting in cement baker over the remaining subfloor. I have heard of others doing this but would like to hear of issues I may encounter before doing this. I have access to the floor from below so I can do whatever is needed to shore it up. The space to be dropped is about 5' by 5'.

Any advice would be great.
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Old 08-02-05, 06:29 AM
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Something to consider is why it was built up like that in the first place.
Chances are, the tile installation required it.
Since cement backerboard does not add any structural value to the floor,
your "after" floor will not be as stable.

I'm not an expert, but you will need to know the joist size, spacing, and longest unsupported span for these joists.
That you're only doing 5ft^2 helps.
Access to add structure from below is a plus also.
Old 08-02-05, 04:07 PM
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1/2" is nothing, install a marble saddle between the 2 different floors in the doorway opening, done all the time.

But yes, if you answer the above questions, maybe we can get it lower, depending on what you have for a subfloor.

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