Underfloor heating with glued parquet is probably slow but still okay. But what about underfloor cooling?
No problem at all and it works just as well or badly in reverse.
We have parquet and underfloor cooling everywhere, and we are satisfied with both. Just last week, after the cooling was switched off at the end of August, there were again 1-2 warmer days and my wife felt hot. She complained that she noticeably missed the underfloor cooling :)
I disagreed with her that it wasn’t too warm and that more rainy days and cooling would follow in the next few days. If I were to turn on the cooling, it would anyway take about 24 hours before you’d notice anything....
Long story short, I switched it on and was surprised to feel noticeable coolness in the floor everywhere already two hours later. Faster and more clearly, of course, in the tiled rooms (bathrooms, utility room), but the cooling was also noticeable in all the other parquet rooms and the next morning it was at the desired "setpoint".