Installing Tile Underfloor Heating

A quick guide to installing underfloor heating.

Items you will need
Floor Preparation

Before you carry out the installation of your new under floor heating system it is vital that you prepare the area first.

  1. Remove old flooring and / or prepare surface of existing floor to accept the installation.
  2. Where possible ensure the floor is completely flat, if required use latex level compound to take out any uneven areas.
  3. Clear the floor of any debris and make sure the surface is clean and dust free.

Installation method for Tile Underfloor heating

Under Tile heating is the most common form of installation when retro fitting underfloor heating. Most commonly this type of heating system is installed in Kitchens, Bathrooms and Conservatories but suitable for all other areas.

Installation

        1.  Dry lay your Easy-Heat insulation before sticking it down, this will enable an easier installation knowing all the board are of a snug fit. You can cut the boards with any market brand of sharp construction knife.
        2. When you are happy all the insulation boards are in situ, Mix the flexible tile adhesive as directed on the bag, Using a 3-5mm Notch trowel apply a full spread of adhesive under the insulation boards and press them down firmly so they sit evenly on the floor.
        3. Allow the Adhesive sufficient time to cure before walking on the insulation boards.. See guidelines on adhesive packaging.
        4. Lay out your tile underfloor heating to the desired design or if a plan was provided you can follow that.
        5. Test the heating mats resistance with a multi-meter to ensure they are within range, a resistance chart is provided in the installation manual.
        6. Document the Mat serial number / size / position and resistance on installation chart provided.
        7. Stick the heating mats to the insulation using high adhesive tape provided.
        8. Guide the cold leads (lives and neutrals) to a junction box.
        9. Lay the thermostatic floor probe (provided with the thermostat) in between 2 ribbons central to the floor (Approx 20mm from ribbon element).
        10. Ensure the heating mats and wires are as flat as possible.
        11. Lay the tiles using an 8-10mm Notch Trowel of tile adhesive over the top of the mats to stick the tiles down. Check the mats periodically to ensure there is no damage.
        12. An electrician must make all electrical connections and carry out another resistance check at this point.
        13. Allow 7-14 days for adhesive to fully cure before activating the underfloor heating system.
        14. Your underfloor Heating is now ready to be used, simply switch on and enjoy.

*** In Kitchens, Bathrooms and wet areas an earth mesh may be required. The earth mesh is 0.72mm and laid on top of the heating mats. Full coverage in bathrooms and in front of sink and appliances in kitchen.

Frequent Questions

The more insulation you have the less the heating mats have to work making it more cost effective to run. We always recommend the use of insulation to ensure all the heat is transferred into the room where it is needed.

Normally a screed is between 70-100mm over the top of the insulation, for the installed insulation to reflect the heat upwards it would have to travel through the existing screed. This is a waste of valuable energy. Even with insulation below the screed we recommend insulating the surface above the screed.

Underfloor heating will heat up and cool down at regular intervals, this in turn causes expansion and contraction. If you use a standard tile adhesive it could cause the tiles to come loose or even crack. We strongly advise against the use of standard tile adhesive.

The ribbon underfloor heating mats have a large surface coverage area and therefore can work at lower temperatures. The usual working temperature of the heating elements is less than 26 Degrees C.

There are certain furnishings that may not be suitable with any under floor heating. i.e bean bags, insulation mats, large cushions and the like should not be placed directly on the floor.

Installation Video