Hello All, First post and hope you can help... I'm looking to have a combination of Tiles and LVT layed in a kitchen at the same time as we do some resto work on the Gfloor of our old place to accommodate my other half's developing medical challenges, which will need level mobility friendly flooring. We are looking to raise some rooms by approx 130mm to meet others but there are limits in how much we can raise the Kitchen floor. And to make it more complicated we are installing UFH (wet) so we can have unrestricted ability to lay out the rooms for all eventualities. The kitchen will have UFH fitted between joists in the kitchen with spreader plates. I was intending to lift the existing solid pine floor install the UFH, then lay 18mm T&G boards directly to joists and then LVT planks....simple, and it keeps the floor height to approx 20mm above joists. Then my better half is contemplating ceramic tiles in the heavy wear places , basically in front of the wet areas of the kitchen, which would meet up with LVT tiles. Problem is that I think I need to allow 12mm for tiles and adhesive leaving approx 8mm of sub floor....is that enough? What do I use?...any other advice welcome.