Bathroom raised floor foundations?

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Old 07-31-19, 07:24 AM
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Bathroom raised floor foundations?

Hi to all forum folk! I'll cut to the chase...

I'm renovating a bathroom. I want to build a wooden frame structure for a raised floor due to the height of the main sewage pipe and wanting to build a shower tray etc.

Currently the floor has been dismantled down to old tiles, two different areas of tiling (with about a cm difference in height between them) make up the entire space.

1) Can I build the wooden sub-floor frame straight onto the old tiled floor?

2) If yes, how do I solve the problem of the cm difference? Shims? Made out of what?

3) Should I just remove all the floor tiles and put down self-leveling thin set mortar for the foundation?

4) Or is it better to just grind down the tiles and then add a primer and then thinset to level the floor?

Please check out the pics for more details, (one pic just demonstrates the kind of wooden frame i want to build)

Thanks so much in advance for your time and expertise!

 
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Old 07-31-19, 09:26 AM
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Picture(s) are way to small to see!
 
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