No, this column isn’t about the comments offered to a congressional committee by a certain presidential candidate. It’s about the effect tubing depth has on the thermal performance of a heated floor slab.
On some installations the tubing and reinforcing mesh it is attached to gets lifted into the thickness of the slab as the concrete is placed. Other times, the masons trample over the tubing and mesh as if it is not even there and the tubing inevitably ends up at the bottom of the slab.