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I was interested in this same question with regard to UFH, under floor heating.

From what I have read elsewhere, flagstones are excellent conductors and ideal as a floor covering over UFH pipes and screed.

They conduct well, so the heat travels into the room 'easily'.

If they are thick (like the ones I'm just installing in a cottage), they add significantly to the bulk of the floor. This means it will take longer to warm up initially (and longer to cool down), so heating controls need to take this into account.

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12y ago

What else can I help you with?