In-screed electric underfloor heating is a comprehensive option for many modern homes. This type of heating is versatile, ideal for most residential uses, and highly adaptable to onsite needs for the right type of residence. It is also a very practical solution for bathrooms and other areas where traditional heating systems may not be appropriate.

The in-screed heating cable is the most popular and versatile heating cable. Its flexibility allows for a variety of installations including stairs, round rooms, and similar environments. This type of heating system requires a sand and cement bed of at least 20mm to be laid on top. The in-screed cable has a fast response time and it will reach its set temperature in approximately 1-2 hours depending on screed thickness.

Cable Technology

The in-screed cable is a twin conducting cable, allowing for easy installation. There is no need to return the cable end to the start to complete the circuit, which makes a vast difference when installing in small areas like bathrooms.

Heat Output

The in-screed cable has a heat output of 175W per m² at 100mm spacing or 225W per m² at 75mm spacing. The cable is available in factory terminated lengths ranging from 10m up to 150m. Comfort Heat staff will help select the correct cable length and spacing for your heated area.


The in-screed cable is installed before the cement screed, beneath any type of floor covering (generally tile). It is required that you cover the cable with a minimum of 20mm bed of screed. The cable can also be installed in a polished concrete floor.

The heating cable is held on the floor by two options:

  • Metal retaining strip typically used in large areas with no waterproofing
  • Clipped to wire mesh that floats on the floor (does not affect waterproofing)

The cable is always installed with 100mm clearance from all walls and fixtures.

Special Requirements

Comfort Heat must be informed of any expansion joints in the slab. The cable must not be installed over any expansion joints. For large areas, multiple cables will be installed.

Talk to the Experts about In-Screed Underfloor Heating

To find out more about in-screed underfloor heating, download our brochures below. If you’d like to ask about our products and services, call us or contact us online.

Please note: In-screed underfloor heating requires a range of site metrics and measurements. We’ll need information regarding your site to provide an accurate quote and the best technical advice.



Cable Type Twin conductor heating cable with earth screen
Construction Multi-stranded heating wire with double insulation, earth screen and sheath
Insulation 4000 V
Rated Voltage 230 Volt AC; Rated output 17W/m
Cold Tail 2.5 metre with splice connection
Cable Diam. 5.3mm
Cable IEC800 Class II
Warranty 10 years