ᐅ Upper floor without screed – concrete subfloor only

Hello,

I have visited several developer-built houses and noticed that they construct the upper floor without a screed layer. Friends and acquaintances also sometimes do not have screed on their upper floors. The insulation for, for example, laminate flooring is placed directly on the concrete, with the laminate installed on top.

How should this be approached, considering that developers build the upper floor without screed? Should one be cautious, or is this common practice nowadays?

Well, I would say that’s not a good idea! Every movement is directly transferred to the masonry.
If there is no screed, then at least use decoupling mats—I don’t remember their exact name, but we have them installed on the ground floor.

How do you install electrical wiring, underfloor heating, and similar systems? Should they be milled into the concrete ceiling?

Not every upper floor has underfloor heating, and cables can also be installed in the walls.

In theory, it is forbidden to make horizontal channels in the wall (how else would the cables run from socket to socket without lying on the floor). This significantly weakens the stability of the wall. The thicker wall material required because of this will likely partially offset the cost savings on the screed.

Prefabricated house

A bit more information would be helpful.