Reading a previous thread I feel that there is hope for my situation. The names listed below are from contributors of the old thread, that is the only reason they are mentioned. Thank you. @Localtiler, @3_fall , @jcrtiling - Guys I'm in desperate need for some PROFESSIONAL advice. I've saved for 10yrs to get my family home extended... I've had no house now for just under a year with 2 young children. This has literally broken me, so any advice would be massively appreciated. I've had the wunda EPS 400 install to the whole of my downstairs as I have a 120 X 120 - 6mm ceramic tile laid. 1 month ago the floor protection was finally removed as my was kitchen installed. After waiting a whole year for this moment... I walked into a nightmare! A number of tiles have blow and all felt hollow. They have dot and dabbed my whole floor! After 4 week battling between my kitchen company (Tillers) builder (floor prep) I have finally got the kitchen company to agree to fix it... now I want it done properly! Tilling: They used an adhesive to stick down a ditra matting directly on top of the boards before dotting and dabbing the tiles to get them level as the house is sloping by 30-40cm. Bal adhesive from Topps tiles. Very wrong!!! Floor prep: The builder glued the boards directly onto the concrete floor (extension) and the existing wooden floor boards. No levelling at and the existing wooden floor area has movement when standing on it. My question to you guys - The Kitchen company recommend removing the tiles and as much of the adhesive and then screeding it level - Reading this thread this doesn't seem right but will this work? Or would you advice to remove the UFH and start again? For both option do you have any experience with how you would do it? @Localtiler, @3_fall , @jcrtiling Do either of you do consultancy work and would be interested in helping me I'd be happy to compensate you for your time. I'm in south east London.