Radiant Flooring in Slab

Here's a picture of our roughed-in radiant flooring system. It will be an open system running off  a dedicated tankless water heater. We plan to also have a suspended plan of jip crete in the upstairs apartment and also in the old section of the house. We have never actually installed one of these systems before, so we are learning as we go. But so far, things are lining up and we think that the radiant system will be very effecient.