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rodeo-99 t1_j59fpb0 wrote

Foil would make very little difference if any. Reflective materials are good for preventing radiating heat loss but your problem is conductive heat loss. If you don’t want to add any additional height to your floor, your best bet is electric in-floor heating.

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eroticdiscourse t1_j59hk3l wrote

I get you, would something like this work?

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niconpat t1_j5albkt wrote

Yes, but definitely use some type of insulation too or you'll be directly heating the concrete subfloor as well as the tiles. You can get thin insulation boards, something like these. Also make sure you wire in a timer and/or thermostat or you'll be running crazy electric bills.

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