floor tiling

[preston]

I want to ceramic tile a kitchen/breakfast room, that has a part concrete, part wooden floor, how should the floor be prepared?

[gcol]

Welcome to the forum.

I'm assuming here that your wooden floor is floorboards.

Option 1
You'll need to overboard the floorboards with 12mm wbp ply (exterior ply) screwed every 200mm all over the face of the sheets. The sheets should be staggered so as not to get 4 corners meeting in the same spot. You need to overlap the ply onto the concrete section by about 450mm and make sure that it's glued and screwed to the concrete.
Fitting the ply will mean that your concrete section will almost undoubtably not be at the same level now. (I'm assuming that the floor was all on the same level to start with.) So now you need to raise the concrete section to the level of the newly fitted ply using self levelling compound.

Option 2
When you overboard the floorboards as above, you do the same to the concrete section. You'll need to stick the sheets to the concrete and I'd add screws too (every 450mm or so). If you go down this route, make sure that the sheets of ply overlap the transition line where the flooring changes from concrete to floorboards.

When tiling you must use a flexible powdered adhesive. I swear by Bal single part flexible adhesive and won't use anything else when tiling onto wood. Grout must also be flexible too.

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