How to install an electric underfloor heating mat

Step 1
Measure the room and draw a sketch to help you calculate which mat or kit you will need. Then sketch in the position of the Underfloor heating mat.

Choose the correct mat and install on the recommended construction.

Step 2
Mark the positioning of the toilet before you remove it. This helps you avoid placing the toilet on top of the mat - and prevents you from piercing it with screws.

You will need to do the first of three resistance tests before you attempt to start laying any mats to ensure that your warranty is validated and record your resistance on your commissioning record provided with your mat / kit.

Step 3
Cut a channel approx.10mm deep and wide in the wall and the floor, from the thermostat and about 1m out into the floor. Glue the flex pipe for the sensor into this channel, and seal the end of the pipe with a piece of tape.

Carry out the first fix installation for the electrical connections - A qualified electrician will be required for this.

Step 4
Clean the floor thoroughly, removing all dirt and soap residue, then lay out the self-adhesive cable mat. The floor surface must be primed if you are not laying the mat on existing tiles.

Top tip - Use a thermal substrate insulation board will improve the thermal performance of your underfloor heating system.

Step 5
Clip through the grey netting to turn the mat over - but make sure that you do not cut through the red cable.

Step 6
Turn the mat and position it as required. The self-adhesive effect can withstand 10-20 adjustments, so you can move the mat several times until you are satisfied with the result.

You will need to do the second of three resistance tests after laying the mats, to ensure that your warranty is validated and record your resistance on your commissioning record provided with your mat / kit.

Step 7
After you have positioned the cable mat, you can - depending on the new floor surface - encapsulate it using self-levelling screed or cover it with a thin layer of tile adhesive.

Once you have laid your final floor you will need to do the final resistance test to ensure that your warranty is validated, and record your resistance on your commissioning record provided with your mat / kit.