Tile underlayment problem...help!

If the two sections of floor are at different height would it be possible to apply some plywood to the other floor

I would build up both sides with plywood and lay a continuous underlayment across and over the concrete sill to tie it all together. I’ve heard of people laying down radiant piping then pouring a layer of cement over the whole area to level it out. I’m not sure what requirements the structure would need to handle the weight.

Both scenarios would probably mean that you’d have to trim or re-hang the doors to clear a higher floor level.

You can rent a grinder to take it down, check out the local rental yard and see what tools they have for this. When you do this, be sure you seal off this section of the house to keep the dust to a minimum.

Good luck.

With the space limitations, you could go with an electric radiant flooring and the Shluter membrane. You need to bring the surfaces even though first. Chip out all the old self-leveler, clean it up really well. Get some new self-leveler and an additive to help it stick to the concrete; it’s not bad to etch the concrete first with some muratic acid. Once you have the floor level, you can set the Shluter membrane in thinset and let it harden overnight. You’ll need a 1/4” of thinset over the top of the membrane to shield it from the radiant heating, so add a 1/4” of thinset. Then you can lay the electric radiant in another 1/4” of thinset. Let it set overnight and then lay your tile. You’re going to be adding roughly 1” to 1 1/4” to the highest point in the area this way, but it’s the lowest combination I can think of.

Good luck!

Fick you.
Kizi 2

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