You do not want to put electric heating cables directly on top of a concrete slab!
Because the concrete slab will pull all the heat into it instead of allowing the heat to radiate up through the flooring surface.
CeraZorb® is a synthetic cork underlayment that is recommended when installing an electric floor heating system over a concrete slab to prevent heat loss.
This thermal image of a heated floor shows the temperature difference in a section of the floor that does not have any underlayment (upper left in blue) compared to the rest of the floor surface containing CeraZorb® underlayment. The result is dramatic. The area with CeraZorb® underlayment (insulation) heats the floor as intended.
For more information, visit our website at www.warmlyyours.com. You can also call us at (800) 875-5285 to speak with one of our friendly knowledgeable account managers. Our technical support staff is available 24/7 to assist you during installation.