Thermoscreed is ideal for new build projects where height build up is not limited. Designed for use in 20 – 100mm screed layers. In Screed heating systems allow the floor layer to prepare a perfectly flat floor to lay the floor covering over. Thermoscreed is suitable for almost any flooring finish including wood, carpet and vinyl.

Thermoscreed is a versatile heating cable designed for installation in the screed layer of new builds or renovation projects. It creates an energy efficient heating system by warming the screed to create a slow release thermal mass. Suitable for use with sand and cement, anhydrite and flow screeds.

Full Kit Ready For Installation

The Thermoscreed matting is available in a kit which includes all the items (except insulation) that you will require for installation of your underfloor heating.  Please note: The fixing tape is the standard fixing method and is included in the kits however alternate fixing methods are available.

Kit items include: Thermoscreed Cable, Fixing tape, Programmable Thermostat (5220A), Floor Temperature Sensor, Sensor Conduit, Cable Monitor(6025), Installation Guide & Warranty Form.

Technical Data

Cable Thickness5.5mm
Max. Temperature28°C *
Max. thickness3.5mm
Max. temperature*28°C *
Protection RatingIP68
Conductor TypeSinge Ended
Cold Tail Length5m


* Regulated by floor sensing thermostat


Lifetime Warranty

We are so confident in the quality of Thermonet Underfloor Heating cable that we provide a lifetime warranty on each system, as well as a three-year warranty on our thermostats.

Robust, Hard Wearing Cable

We are so convinced in the quality of Thermonet Underfloor Heating cable that each system comes with a lifetime warranty, as well as a three-year warranty on the thermostats.

In Screed Heating

It is recommended to be fixed to insulation boards and is suitable for installation in screeds ranging from 20mm to 100mm.

Efficient Storage Heating Effect

Screed systems take longer to heat up and cool down, making them ideal for high-use areas.

Flexible Cable Spacing

By adjusting the cable spacing, you may get the heating output per m2 that your architect specified for the room. Under screed, we recommend an output of 180-220m2.

Stock No.LengthAreaOutputResis.ΩStock StatusAction
3050T11m1.0 – 1.2m2200 W264.5 ΩIn Stock
3051T16.5m1.3 – 1.7m2300 W176.3 ΩIn Stock
3052T22m1.8 – 2.2m2400 W132.2 ΩIn Stock
3053T27.5m2.3 – 2.7m2500 W105.8 ΩIn Stock
3054T33m2.8 – 3.2m2600 W88.2 ΩIn Stock
3055T39m3.3 – 3.8m2700 W75.6 ΩIn Stock
3056T45m3.9 – 4.6m2850 W62.2 ΩIn Stock
3057T55m4.7 – 5.6m21000 W52.9 ΩIn Stock
3058T69m5.7 – 6.8m21250 W42.3 ΩIn Stock
3059T76m6.9 – 7.6m21375 W38.5 ΩIn Stock
3060T94m7.7 – 9.4m21700 W31.1 ΩIn Stock
3061T116m9.6 – 11.7m22100 W25.2 ΩIn Stock
3062T144m11.8 – 14.4m22600 W20.4 ΩIn Stock
3063T183m14.5 – 18.3m23300 W16 ΩIn Stock

Also available in kits including a Thermostat

Frequently Asked Questions

Screed Heating is intended to be implemented in screed layers ranging from 20 to 100mm thick.

Floor heating will take 2-4 hours to reach temperature in a normal Undertile build-up, and in Screed heating cable under a 25mm screed will likewise require 2-4 hours. However, for every additional 25mm of screed, the heat must be allowed to penetrate for an additional hour.

All of Thermogroup’s underfloor heating systems are appropriate for installation in the shower area if the shower floor is tiled (not a shower base) like the rest of the bathroom floor.

The cable features an IP68 rating for ingress protection and a continuous earth braid that runs the length of the cable. This guarantees that the cable is safe if it comes into contact with water and gives you peace of mind in the unlikely event that the installation is damaged. We recommend that you do not turn off the heating system in the shower area for added safety.

Underfloor heating cable must be coated with a cement-based substance and cannot be used in voids. As long as the shower seat is tiled to match the rest of the bathroom and all cables are covered with a cement-based flexible tile glue, installing heating on a shower seat is entirely safe.

If you’re wondering which floor heating system is best for you or are overwhelmed by the numerous options and possibilities available, Thermogroup’s online underfloor heating system selector tool can assist you in making the best choice. Our underfloor heating selector walks you through a simple four-step process to determine the best underfloor heating system for your specific application, as well as a list of all the products you’ll need to complete the job, so you can rest assured that you’ll have everything you need for installation. If you have any requirements that aren’t covered by the tool, please don’t hesitate to contact us to discuss them.

Yes, absolutely. Although the Thermonet 200W system is designed to be installed beneath a screed, it can also be installed directly beneath the tiles, just as the 150W system can. When positioned directly beneath the tiles, the 200W system will heat up faster than the 150W system due to the larger wattage. Use the 200W system directly beneath the tiles if you want a more on-demand system or if you have a significant heat loss application.

The wattage per square metre and application are the only differences between Thermonet 150W and Thermonet 200W. The Thermonet 150W is designed to be set directly beneath tile, in the tile adhesive, whereas the Thermonet 200W is designed to be installed beneath a screed since the increased wattage makes it more successful at heating through this screed. Please see our article on which system is more effective for a more detailed comparison, or use our Heating System Selector to figure out which system is best for your needs.

It is advised that the floor heating be installed over the waterproofing to ensure a completely waterproof substrate. An in screed system can be installed before the waterproofing in a screed application where the waterproofing is on top of the screed.

The electrician will need to connect mains electricity to the Thermostat position before roughing in for our Underfloor Heating and the controller. The electrician will then need to run two 20mm conduits from the thermostat position to the floor, one for the Underfloor Heating Cold Tail and the other for the Floor Sensor. Please download our Conduit Requirements document for more information and a graphic representation.

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