Underfloor heating - Better to install tiles or laminate?

It heats up faster and retains heat longer, which is also more economical in terms of consumption.

The reaction speed is higher with tiles than with laminate, that is correct. The storage capacity of the tile is also better. But: The heating period is significantly extended. In the transitional seasons, when I still don’t have cold feet with laminate/parquet/vinyl, your discomfort with tiles will certainly drive you to the thermostat to turn on the heating... I think this negates the advantage mentioned earlier.

How big is the difference if the laminate is glued down? (Can a layman handle gluing it, I have only installed it normally so far).

A full-surface gluing usually does not occur, as 99% of laminate manufacturers prohibit it. Cost-wise, it would also be a disaster. The adhesive would probably be more expensive than the laminate.

An underlay with very good conductivity is important. A thermal resistance of 0.01 m2K/W or even less is ideal. The additional costs pay off quickly. Conventional cork or foam has 4-5 times the insulation value! And of course, don’t forget the vapor barrier if it is not already integrated in the underlay.

I would always glue vinyl again. 63 sqm. The cost 1920,- for everything. So six bags of leveling compound, five liters of primer, diluted one to four, 60 m of baseboard, 25 kg of adhesive, plenty enough, and planks for 19.90 sqm. Additionally, six cartridges of mounting adhesive. The process was, vacuum, roll primer onto raw screed. Wait. Pour leveling compound on it, mixed with a measuring cup strictly according to instructions. Spread. Let harden. Grind off burrs with a paving stone. Vacuum. Apply a strip with a notched trowel. Lay, etc. Glue baseboards. Two days, three people. Done. A professional who has done this many times should be there. The vinyl is similarly nicely warm as tile. It feels soft to walk on. The appearance is close to real wood. Karsten

So not polished with a machine after all?

My brother, who is an expert, said after seeing the leveling compound that it was unnecessary, stone would suffice.

Good to know, maybe I'll save myself a lot of trouble

Well, all the grinding