I am shortly going to tile my kitchen floor with 60 x 60 quartz tiles and need advice on what i should do about my floor. My dilemma is that i have had an extension built and one half of my kitchen floor is concrete and the new half is 18mm chip board. I need to use a self levelling compound to bring both sides to same level but do i need to use a latex based self levelling compound or latex the chip board first then use a self leveller? Replacing the chip board really is a major pain in the backside but can be done if you recommend changing it for external ply. Also what adhesive should i use considering the two different types of floor. Any help is much appreciated.