just because you think i'm crazy do'snt mean i'm not. but i still think
i'm right in puttig the pex in the sand.
1) heat tends to go up not down
2) ground holds it's own thermo temp
3) sometimes cement cracks,what happens to the pex imbedded in the
cement?
4) the sand helps defuse the heat, giving more even temp on slab.
i did an install in a basement under a new house. the guy put foam under
the slab.
had one night of freezing temps before he turned the water loose into
the pex, when he did it froze before it made it all the way through.
the only places it did not freeze the slab was where there was pads for
support posts spaced down the cntr with no foam under pads. go figure.
he spent $1000. to rent heat blankets to warm up the floor.
and yes i do have my own hydro plant burning wood. about 12 cord a
winter to heat my house
shop, dry kiln and domestic hot water.
ross