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?