On Feb 18, 10:53 pm, "Steve Barker"
wrote:
Well if your tubing is on top of your rebar (like it should be) and IF the
rebar got positioned properly, you don't have margin enough to grind an inch
and a half off. I'm afraid you'd be dangerously close to the tubing, and
once you even expose a bit of it, you're screwed. So unless there's some
way to 100% confirm the tubings depth, I wouldn't go the grinding direction.

As a side question, what are you heating your radiant floors with?

--
Steve Barker

"d_g_peterson" wrote in message

I have 3 detached buildings all with same set-up of in-floor radiant.
Heat source are plain old cheapo 40 gal LP gas water heaters, plumbed
like closed system boilers, ie. outlet at hot water out, return at
original drain cock, taco pump, expansion tank, air scoop, etc. 3
circuits, tight spacing ~9" at perimeters, widen to 12" near centers.
Recently for about a week straight, maximum daytime temp outside here
was about -5 to -10 and inside temp in buildings never dropped below
64. 1 500 gal lp tank serves 2 building, and is usually good for
entire winter.