Ply and Self Level Compound?

[Tricks13]

Hi, 1st post on the forum but have had much help reading everyone elses probs, am fairly new to tiling.
I have a 35 sqm kitchen/dining room floor to tile in 600x600 polished porcelain. Most of the substrate is concrete but some is a mix of chipboard and floorboards. What would be the simplist way of getting the correct level base? The existing concrete will need some SLC in areas should i use this over the whole floor or ply over the boards and chipboard and then self level to the height of the ply over the concrete? Thanks

 

[DHTiling]

Hello and welcome.........

You can self level over the concrete section no probs....I would overboard the timber section and level the concrete to it....you will need to put a movement joint where the concrete meets timber as they will expand at different rates and the timber section could have deflection also and cause the tiles to de-bond.....you can use Silicon the same colour as the grout to make this joint in the tiles.....