Install a Heated Wood Floor
Step 2: Locate the thermostat.
Warmup electric radiant heat mat systems are designed to be used with a UL Certified programmable thermostat. Locate your thermostat approximately 5 feet off floor and always on an inside wall. Try to avoid placing it near heat sources, excessive sunlight from windows, or skylights.
The Warmup proprietary 3iE and 4iE thermostats include the safety of upper-limit temperature monitoring. This means that when selecting “wood floors” in the programming, the heat settings will never rise past 82F and ensure smooth and gradual heating of the floors.
Step 3: Run a 20-amp, GFCI protected circuit.
Run a dedicated 20-amp GFCI circuit to your thermostat location. Prior to closing up any walls, I install a wire pull string from the thermostat box, down the wall cavity, and through a notched section of the 2×4 wall shoe plate. After the wallboard is installed the string will be used to pull the cold lead and floor sensor wire up the wall to the thermostat location.
Step 4: Install wood sleepers.
Using wood strips 1/4- to 3/4-in. thick and 2 inches wide, install strips at 12- to 16-in. intervals when using the Warmup system. Leave a 2-in. gap at alternate ends of the strips for heating wires to cross from one section to the next.
Step 5: Install the fixing strips.
Use hot glue, nails or screws to secure the strips to the floor with a minimum 3-in. distance from the walls and permanent fixtures.
Step 6: Install the heating system.
Starting at the closest point on the floor to the thermostat, tape the joint to the subfloor.
Lace the heating cable on the fixing strip and run it back and forth in parallel to the wood sleepers until all the sections are filled in.
Step 7: Install the temperature sensor probe.
Place the probe wire containing the capped sensor evenly between two runs of heating cables at least 12 inches from the wall into the heated area. At no time should the probe wire cross the heating cable.