There are two types of systems, "wet" or "poured" systems, where the PEX tubing is encased in a gypsum or concrete based topping, and "dry" or "staple-up" systems, where the PEX tubing is held against the underside of the subfloor.

This home made use of "wet" or "poured" radiant floor heating systems throughout the entire house. The installation on top of subfloor was used on the main and second floors (2964 square feet). The basement and detached garage used the ground floor installation (approx. 1500 square foot basement and 720 square foot garage). The picture to the right shows the PEX pipe rough in and TwistSeal distribution manifold. The inset picture shows the area after the concrete had been poured.