the present invention relates generally to a radiant heating assembly , system and method . one or more elongate thermally insulative panels are coupled to one or more elongate structural members wherein each such panel assembly may be placed adjacent or in longitudinal alignment with another such panel assembly . the structural members are configured to extend longitudinally and / or recess longitudinally with respect to the structural members for assisting in longitudinal alignment thereof . the thermally insulative panels may include a radiant heating element received on a surface thereof . a tubing for transporting heated water or electrical energy may be received by the radiant heating element for delivering heat therethrough . one or more edge panels may be positioned at a longitudinal edge of the thermally insulative panels wherein a groove in a surface thereof provides for the delivery of the tubing from one thermally insulative panel to another .