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CogitoErgoScum t1_jdk4i6m wrote

The right way is to cut out all the concrete. Then you drill holes into the slab, hammer in rebar, and repour it.

If I was going to half ass it, I would just clean it up and tile it with a super thick mortar bed so you can grade it as you lay the tile.

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Affectionate_Leg_686 OP t1_jdk7y0v wrote

Thank you for the suggestions.

I hope these are appropriate questions to ask (still trying to learn how to abide by the forum's rules ):

Mortar wise, what do you think about reinforcing it with wire mesh? Any mortar will do or would you recommend some particular mix (not looking for a brand here -- the type),. Structurally strong concrete mixes seem to need 5" to 7" thickness which we cannot do here (I see your point about redoing the whole thing is the right approach).

Would adding a cement board on top of the mortar be a good idea? I am thinking this would reduce how thick the mortar needs to be and maybe it can help avoid crumbling in the long run. Or this is half assing it to the square :)

Thanks!

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