[HTFreak]

I have never had issue with water in my basement besides a sink problem
that flooded the basement once, but I have a concrete slab in my basement
and I want to install ceramic tile.

My understanding is that you put plywood, then thinset on top, then backerboard, the more thinset, then the ceramic tile...

If there is flooding, won't the plywood get wet underneath and have no way of drying and therefore cause a mold/smell issue?

 

[Nealtw]

I have never had issue with water in my basement besides a sink problem
that flooded the basement once, but I have a concrete slab in my basement
and I want to install ceramic tile.

My understanding is that you put plywood, then thinset on top, then backerboard, the more thinset, then the ceramic tile...

If there is flooding, won't the plywood get wet underneath and have no way of drying and therefore cause a mold/smell issue?

Tile is the best floor to deal with a flood, why would anyone put wood in there.

 

[HTFreak]

Tile is the best floor to deal with a flood, why would anyone put wood in there.

I agree but a lot of videos are preaching to perform these same layers in this video:

 

[Nealtw]

I agree but a lot of videos are preaching to perform these same layers in this video:

https://www.youtube.com/watch?v=ACw1G-cllqQ

That's just goofy.

 

[huesmann]

Why would you not just put your tile directly on top of the concrete? I mean, if your concrete is really smooth maybe rough it up some so your adhesive has some purchase, but otherwise, why?

 

[Spyder]

I'm not a tile guy. but as far as I understand the plywood is only there since its a subfloor. Your subfloor is a concrete slab, no need for the plywood. I don' t think (but don't know) if you should be doing backer board on top of concrete.

check for level/flat and consider what to do if your floor is painted concrete, you may need to rough that up