"Rod Speed" wrote:

I see a lot of "Radiant Floor Heating" with a rubbery tubing
stapled under the floor. SInce I tend to be in horror of any kind
of leaks, I wonder why they don't use some compresses gas instead?
.. . .

However, you can also get under-floor heating that is simply electric
resistance heat. Not necessarily cheap or efficient, but you don't
have to worry as much about leaks...

But you can still get failures in that which while not damaging anything
that matters, still need to be fixed if you want the heating to continue.

So what?!? ANYTHING is subject to failure! The OP SPECIFICALLY said he doesn't
want LEAKS!