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Discussion Starter #1
Redoing my bathroom and I am checking my wooden subfloor for level using a 48" level.

Here's a diagram of how off the floors are. So +3/4" means the point 48" from the center is higher than the center by 3/4"

How bad is this and how would you go about getting it more level?

Seems like the middle point is low.

The non measured areas have rotted subfloor which I am replacing.




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JUSTA MEMBER
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I would be replacing all the subfloor.

Because I think that since there is at least half rotted, that there has been major water damage, and I would want to inspect the floor joists anyway.

And by doing that I can be sure that the joists are still good, and get a level subfloor that way.

So tear all the subfloor out and repair any joists that need it, lay new subfloor level, use CMU backer, and tile it.


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Discussion Starter #3
The rot is pretty much confined to the area where the tub was installed the rest of the floor looks good.

I'm not sure I want to rip up the whole floor.

Is there an easy way to get it level?

Also I hear people say that level isn't as important as flat. How can I test for flat? I guess a longer level and look underneath for bowing?


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