Petar

It's a ground floor. Some parts of the floor have old tile that light cement was poured on, and others have heavier cement below light cement. The floor consists of one large floor that will be kitchen and dining room, another smaller area that is a living room, another that is hallway to a bedroom and a bathroom. Please let me know if you need any other details.

Yeah, you're right. Ideally, there would be the ability to put thicker insulation underneath. I purchased the insulation that I purchased because I thought that it would be better than nothing, at least. Also, that's a good point about no way to fix a fault, but I've already purchased the floor heating and since the electrical installations exist then I guess I should probably just go ahead and use it. At this point, I just wanna make sure of things such as: 1) floor heating won't damage insulation if installed directly on top of it 2) liquid leveling/thermal mass can be super thin 3) tiles can be installed on top in thinnest/most effective manner possible

I have a light cement floor that I intend to install electric floor heating and then tiles on top of. I would like the installation to be as thin as possible and I would appreciate it if anyone can review the plan and offer any feedback. Insulation: https://ybsinsulation.com/brands/floorquilt/ The insulation manufacturer has told me that I can install the insulation without any glue or I can use a non-solvent based product. They also told me that there should (ideally) be some kind of barrier between the insulation and floor heating and that insulation gets damaged at 80°C (floor heating manufacturer told me that floor heating runs at 70°C). Electric Floor Heating: https://shop.fenixgroup.cz/z1587-topna-rohoz-ldts-160-0-5 My floor heating installer had used a very thin layer (~2mm) of liquid levelling/thermal mass product on top of electric floor heating on some other floors. I still need to find out the name of this product. Tiles The tile installer wants to use levelling cement + tile grout and I would also like to review this part of the process to make sure that it results in the thinnest installation possible.