Underfloor heating and 2 cm thick natural stone covering

Hello, dear forum,

we want to lay natural stone on the ground floor (slab, no basement) in our house. Specifically, travertine 40x40 cm slabs with a thickness of 2 cm (this is leftover stock from a hospital construction from the supplier). We are now unsure how this will interact with the underfloor heating, since natural stone is usually only laid 1 cm thick. The supplier said that the heating will take longer, but the heat will also be stored and released for a longer time. Our planner sees it similarly but recommends laying the heating pipes somewhat closer together.

Question: can the 2 cm thick travertine be laid in the living area without us freezing in winter? What should be considered? Will there be additional running heating costs?

THANK YOU!

Question: Can the 2 cm thick travertine be laid in the living area without us freezing in winter?

.. yes .. an optimal heat storage ... the plastic pipes of the underfloor heating should be laid at the correct spacing .... who calculated the heating demand? ..

The supplier said that the heating up takes longer here, but the heat is also stored and released for longer.

.... that's right ... underfloor heating is a somewhat "slow" heating system anyway ...

...Our planner sees it similarly, but recommends laying the heating coils a bit closer together.

What kind of planner is that?

best regards

What kind of planner is that?

.. I would have highlighted the question mark in "bold+black" .... I'm also curious about the answer ...

Thank you for the answers! Our planner is a civil engineer with many years of experience. The note about the heating coils was meant to shorten the heating time. Does anyone else in the forum have experience with "relatively" thick natural stone? THANK YOU!