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Steve Doane
Hot water under-floor heating
Steve Doane

I am far advanced in a remodel and plan to use under-floor hot water radiant heat. The existing floors vary because of earlier remodels and are part wood floor on joists over a crawl space and part concrete slab on grade. The plan is to place the heat pipes on top of the existing floor with OSB spacers and then lay a new solid wood floor on top of that.
We will lay a reflective foil barrier under the heating pipes.
It is being suggested that this system will not work over the concrete slab on grade areas.
Any input or advice?

chasrw07
Re: Hot water under-floor heating
chasrw07

No expert here but you may need to think about insulating under the tubing especially over the slab on grade. the concrete is conductive and will suck the heat down away from where you are tying to heat. Your reflective foil may or may not be enough to do the job. Other than that I don't see any reason it wouldn't work over the slab areas.

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