Underfloor heating in the floor slab - advantages and disadvantages?

At the moment, I can mainly think of disadvantages:
- Repair and similar tasks are complicated
- Cables etc. cannot be laid over the floor slab
- the warming of the rooms is even slower.

Perhaps an advantage is that underfloor heating in the floor slab is somewhat cheaper?
In Scandinavia, this is supposed to be quite popular, also due to lower residual moisture, as there is no screed. But otherwise, does anyone know clear advantages? Or even have practical experience with it?

Look here


That was also a topic there

Cost savings are not everything. And aside from the fact that you lose unnecessarily a lot of energy through the floor slab into the room below. What happens if the underfloor heating has a problem and you need to access the pipes? Dismantle the floor slab?

We decided on underfloor heating in our current house in a developer-built terraced house settlement built in 2001. There are tiles on the ground floor, and a type of sisal carpet is glued down on the upper floors. These are the pros and cons we experienced:

- We do not like the room climate - we prefer radiant heat, whether the lots of dust on the heater or on us…
+ no visible radiators
+ about 20% lower heating costs than neighbors with the same house - regardless of differences in heating behavior, of course
+ pleasantly warm tiles for barefoot and sock wearers
- sluggish heating system, which unnecessarily reheats after quick ventilation - this can be prevented by putting a Tupperware container around the sensor or "remembering" to lower the room temperature during ventilation, but it is annoying. Are newer systems smarter?
- from time to time, the heating does not work as well in individual rooms. The pipes get clogged even when using "suitable" water. Then it has to be flushed. We have already had this twice.
+ technically reliable apart from that - we did not have to access the floor.

Conclusion: No underfloor heating in the new house (hopefully moving in June 2019)

Was your underfloor heating in the screed or in the base slab.

We also do not have underfloor heating.
We have two small radiators in the overflow rooms that switch on at about -5 degrees outside temperature and one in the bathroom. The rest is handled by the ventilation.

- We do not like the indoor climate - we prefer radiant heat, whether it's due to the lots of dust on the heater or on us...

A surface heating system, which also includes underfloor heating, primarily heats through radiant heat.

- sluggish heating system, which unnecessarily reheats after shock ventilation multiple times - can be prevented by covering the sensor with a Tupperware or remembering to lower the room temperature during ventilation, but it is annoying. Are newer systems smarter?

Simply omit ERR and design and adjust the heating system properly.

- from time to time the heating in individual rooms does not work so well. The pipes get clogged even when filling with "suitable" water. Then it has to be flushed. We have had this happen twice.

Poor installation of the system. There is nothing more to say about that.

Conclusion: No underfloor heating in the new house (moving in hopefully June 2019)

Well, to each his own. Nowadays, I would not want to choose anything else. Maybe even wall heating in addition to underfloor heating.