Radiant Heat and Ceramic Floor Tile

There are two types of radiant heat systems available to you, hydronic and electric systems. The hydronic radiant heat system requires the installation of a serpentine network of plastic tubing, a boiler, manifold and pump system. With hydronic radiant heat systems warm water is pumped through the tubing to produce the radiant heat. Hydronic radiant heating systems are ideal for heating an entire home, however they are expensive to install due to all of the labor and mechanical equipment required.

Electrical radiant heating systems, however, are much less expensive to install and are ideal for spot heating, such as underneath a ceramic tile floor. Electrical radiant heat systems do not require pumps, boilers, and manifolds. And nor do they require the installation of plastic tubing. Expect a typical electrical radiant heat system to cost you between $500 and $1,000 dollars to install. An electrical radiant heating system basically comprises of a low voltage control box, a thermostat, and a very thin grid of electrical wire that is sandwiched in between the subfloor and the ceramic tiled floor. Due to the fact that the electrical wire grid is so thin a floor does not need to be elevated in any appreciable amount to install an electrical radiant heat system.

When installing an electrical radiant heating system a separate 15 or 20 Amp Ground Fault Circuit Interrupter (GFCI) protected circuit will need to be wired into the main circuit panel. A licensed electrician should install this for you. After the electrical circuit has been established in the main circuit panel you can go about installing the electrical radiant heat system, of course with the circuit break turned off to the future radiant heat system.

There are a number of electrical radiant heat manufacturers and systems you can choose from. Basically they all comprise of a mat or plastic slotted channels that are fastened to the subfloor, with the electrical heating wire installed into them. Often the mats or channels can be cut into various shapes and the electrical heating wire installed afterwards to satisfy any type of floor plan. After the electrical radiant heat system has been installed onto the subfloor and has been wired up to the new GFCI circuit, the ceramic tile floor can then be installed.

Before installing the ceramic tile, however, it’s important to first read the electrical radiant heat system manufacturer’s recommendations on how to install the ceramic tile over the radiant heat system. Not all ceramic tile thinset mortars work well with radiant heat systems. In addition, the electrical radiant heat system needs to be protected against moisture problems. Typically a moisture membrane liner needs to be installed in between the radiant heat and the ceramic floor tile to prevent moisture penetration and corrosion issues.

So before you install a ceramic tiled floor in your bathroom or kitchen, check into including an electrical radiant heat system. Your family and your bare feet will be thanking you for years to come.