Preparing for your project

Do I need to prime my subfloor before installing Ultralight?


You can stick the insulation boards to the concrete slab using regular modified or pre-mixed thin set. We recommend a 1/4 x 1/4” trowel.

How do you stick the insulation boards to the concrete slab ?


You can stick the insulation boards to the concrete slab using regular modified or pre-mixed thin set. We recommend a 1/4 x 1/4” trowel.

Do I choose cable or mat electric floor heating systems?


This page explains the difference of the mat and loose cable options but ultimately either the cable or mat option will give you the design freedom you are looking for.

Was your electric floor heating system installed directly on a concrete slab?


Without a thermal break, the concrete acts as a heat sink. Therefore, the heat is drawn first into the concrete sub-floor before your floor covering. This is why Warmup recommends installing Warmup Insulation Boards over the concrete sub-floor to act as a thermal break. This forces the heat radiate upwards first rather than down into the concrete slab. Warmup insulation boards can increase ramp up time by over 70% and decrease heat loss by over 90%.

Floor Probe Installation Instructions


The thermostats come with a 9’ sensor cable to detect the temperature under the floor finish. The end of the probe wire contains a capped sensor that should be evenly centered between two heating cables at least 12” into the heated area. At no time should the probe wire cross the heating cable.

What are the electrical requirements for my Warmup system?


Please verify that the circuit can handle the amount of amperage your heating system requires. Your thermostat can only handle up to 15 amps so if you are connecting multiple heaters to one thermostat location, you may need to use a relay and a larger breaker. Your or your electrician can find out the amperage rating of your specific floor heating system in installation manual or printed on the box. Note: Just because the Warmup thermostats are dual voltage, this does not mean you can supply any voltage to your heating system. You must supply the voltage supplied to the voltage of your specific heater.

Do I need to provide a transformer to wire in 3-phase?


To wire in 3-phase you need 3-phase supply power. Click “Read More” for details.

Connecting Your Foil Heating System


For tips for connecting and programming your system click “Read More”.

Installing the Sensor Probe


It is vital that the floor heating thermostat’s floor probe was not only installed but done so the right way.  Click “Read More” for details.