For radiant under floor heating how close should the plastic pipe be to the
underside of the subfloor? Is the reflective bubble insulation better or
fiberglass bating? My plumber installed the piping 5"-8" below the subfloor
and I have open web joists. It will be very difficult to insulate with the
foil-bubble insulation now. Should I insist that he re-attach it closer to
the subfloor? Thanks for any opinions.