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Electric Underfloor Heating Installation

A Simple Guide to Installing Electric Underfloor Heating

Electric underfloor heating is a modern, efficient way to heat your home. It provides even heat distribution, reduces energy consumption, and frees up wall space that would otherwise be occupied by radiators. Here’s a detailed guide to help you install electric underfloor heating using heating mats, the method is very similar to that of heating mats, however, please consult the instruction guide provided with your product for detailed guidance.

Product Identification

The heating mat consists of a heating cable embedded in a mesh with double-sided tape. Our heating mats are 0.5m wide, with varying lengths depending on the mat size. On our website they are available in power ratings of 160 and 200W/m² at 230 V

Important Preparations

Before beginning the installation, consider the following:

  1. Electrical Requirements: The electrical connection to the mains must be performed by a qualified electrician in compliance with national wiring regulations​.
  2. Output Requirements: Calculate the required wattage per square metre based on the room’s insulation and usage. For well-insulated rooms, 160 W/m² is sufficient, while poorly insulated areas may require up to 200 W/m² so long as the floor finish allows.
  3. Calculate Heated Area: Measure the area to be heated and plan the mat layout. Avoid placing mats under fixed units or furniture to prevent thermal blocking.

To get an instant match for your floor, simply measure your room and use our calculator to work out the correct electric underfloor heating mat. Our calculator is suitable for rooms between 1.1 and 17.5m². If you need assistance with specifying a multi-mat room please contact us.

Installation Steps

1. Prepare the Subfloor

Ensure the subfloor is clean, dry, and free of sharp objects. Prime the floor with a suitable primer.

2. Layout Planning

Make a drawing of the room and mat layout, allowing for a 2-4 cm border around the room. Avoid placing the mat cables closer than 3 cm to any conductive parts.

3. Rolling Out the Mat

Unroll the mat onto the floor with the mesh side up. When you reach a wall or obstruction, cut the mesh (not the cable) and turn the mat to continue the layout.

4. Installing the Mat
  • Measure and record the resistance (L-N) before starting the installation. Fill in these details on the warranty certificate.
  • Secure the mat to the floor using the adhesive backing. Ensure there are no air gaps or creases in the mat.
5. Connecting the Thermostat

The heating mat must be connected to a thermostat by an authorised electrician. Ensure the connection is made in parallel if multiple mats are used.

6. Covering the Mat

Pour a suitable covering compound over the heating mat, ensuring it is free of sharp objects. Spread it evenly without air cavities and avoid damaging the cable. Our recommendation is to use a cement based, flexible (latex) floor levelling compound/screed. If the floor finish is not tiled, then we recommend a layer of at least 10mm.

7. Testing

After installation, measure the resistance again to ensure it matches the initial readings. This confirms that the mat has not been damaged during installation.

Final Steps

Once the installation is complete, document the layout and connection details. This should include a drawing or photograph of the mat placement and resistance measurements. This documentation is crucial for warranty purposes and future reference.

Maintenance Tips

  • Avoid placing flat furniture directly on the heated floor as it can block heat distribution. Furniture must have at least a 10mm air gap beneath it.
  • Regularly check the system and thermostat to ensure optimal performance and energy efficiency.

By following these steps, you can enjoy the comfort and efficiency of electric underfloor heating. Always remember to consult a professional electrician for any electrical connections to ensure safety and compliance with regulations.