Underfloor heating and floor height - what you need to know...

Underfloor heating and floor height - what you need to know...

Questions regarding underfloor heating and floor height are some of the most common questions ThermoSphere get asked. In this article they will break some myths surrounding electric underfloor heating and floor height. They’ll also walk you through key considerations and options when selecting which electric underfloor system is right for your project.

How different underfloor heating systems impact the height of your floor

When it comes to choosing an underfloor heating system there are two main types. Water-based heating systems (hydronic) and electric heating systems (read ‘Electric vs Wet Underfloor Heating – The Battle’ for a detailed comparison of the two). The heating component of both systems doesn’t add much to the total height of the floor, it is the installation process used for your chosen underfloor heating system. For example, the thickness of insulation.

Water-based underfloor heating

Water-based systems are more commonly used in new build projects and the pipework is embedded in a thick layer of screed. The heated part of the system (the pipework) in much thicker than its electric counterpart. However, because this system is used more in new builds or extensions, the height of the installation can be accounted for in the design and planning stage prior to any building work commencing. Outside of this, installing wet underfloor heating can raise floor height by over 15cm.

Electric underfloor heating

Electric underfloor heating systems are thinner than water-based systems and have much less impact on height build-up. ThermoSphere Mesh is only 3.5mm thick. It also comes with a cold tail which is only 4mm thick and can easily be concealed within the tile adhesive layer. There are also options such as ThermoSphere's new self-adhesive membrane which doesn’t require a layer of tile adhesive to stick it to the substrate which further reduces the height build-up.

Don't sacrifice insulation to save height

Insulation is a key part of any underfloor heating installation because going without it will mean that your electric underfloor heating system will be far less efficient because heat will be lost through the substrate. Including insulation means that the heat that the system generates and you pay for reflects upwards and heats the room to your desired temperature faster. ThermoSphere coated insulation boards are available from a thickness of 6mm to 50mm and are the perfect option for timber floor substrates. ThermoSphere uncoated insulation boards are ideal for concrete substrate floors and are available in a thickness of 6mm and 10.5mm. The thicker the insulation board, the more efficient your electric underfloor heating system will be.

Retrofitting? Electric underfloor heating fits nicely

Electric underfloor heating can easily be fitted to the existing sub-floor without the need to dig out more depth. Because the ceiling height is already fixed minimal height build-up is needed without compromising efficiency of the installation. Examples of retrofit projects include; conservatories, bathroom renovations and wet rooms.

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ThermoSphere transform spaces into environments of pure comfort for anyone to enjoy. They maximise available living space and help create healthy, affordable, energy-efficient places in which to live, work and play.

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