Traditional floor heating leveling method

But the landlord wrote it in detail and understood it.

First of all, does the ground have to be raised? If it is only partially higher than 1-2cm, you can find a floor grinder to polish off a part.

Secondly, if you must use so many materials for leveling, you must add glue. If you don't add glue, the gypsum floor will fall off like a moth after a long time. Can't use cement plus 108 glue, easy to delaminate from the original ground.

Finally, if you are worried that the floor heating will smell because of glue, you can ask the master to level it with gypsum powder and glue and then apply a thin layer of cement oil.

After reading the topic for so long, I really give some advice. Just do it, hehe.