Underfloor Insulation for Underfloor Heating

Summary: Information on underfloor insulation for underfloor heating

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With more and more people using underfloor heating these days its really important to make sure your floor is insulated properly to allow the heat to come up rather than go down. With this in mind it is very important that your existing floor is insulated correctly to ensure that the heat generated by your underfloor heating prevent sthe heat from going down instead of up.

Insulating laminate or Carpet Floors

When it comes to underfloor insulation and heating, thickness is very important, you want the maximum insulation value and heating ability for the minimum thickness as you don't want to raise the height of your flooring too much. There are quite a few products available that give great heat output but are very thin. One such product is WarmFloors revolutionary carbon under floor heating system that is so thin it hardly makes an impression on floor height, ideal for when every millimetre counts!

With wood and laminate flooring becoming evermore popular this under floor heating system and others like it are the perfect solution.

The under floor carbon offers an attractive alternative to other heat sources such as radiators, as it is hidden from view and can free up much needed wall space, giving you the freedom to design your room how you want.

The under floor carbon heating film which is installed directly below your wood or laminate flooring, provides a fast acting heat system which in most cases can replace radiators and other conventional forms of heating.

The under floor carbon heating's unique double laminated design means that the element itself is less than half a millimetre thick and yet is extremely durable and robust.

The under floor carbon heating system is made up of several components, such as the Depron insulation which would replace any normal wood/laminate underlay, the carbon elements themselves, then a moisture barrier and a digital thermostat.

Cross section of flooring including carbon heating mat and Depron insulation

Cross section of flooring including carbon heating mat and Depron insulation

What is Depron®?

Depron is a highly efficient extruded polystyrene insulation material suitable for use below wood, laminate or even carpets. It is available in 3mm or 6mm thicknesses, does not conduct heat and cannot be broken down. There is therefore no wasted heat. Depron also replaces the underlay required for laminate flooring.

Insulating Tile or Screed Floors

For tiles or screeded floors a tile backer board can be used to give great insulation as well as provide a good key for the tiles. Tile backer boards are ideal for laying underfloor heating on also.

Marmox thermal tile backer boards are high performance, reinforced insulation boards made of waterproof extruded polystyrene, each side is faced with fibreglass mesh embedded into a cement polymer mortar. Marmox boards are the perfect solution for insulating and waterproofing in one operation and the boards are especially recommended for all underfloor heating systems.

The main benefit Marmox provides over standard polystyrene boards is the compressive strength of 30 tonnes per sqm. This means that the boards can be fixed on top of the existing sub-floor (concrete or timber). When used with electric underfloor heating cables, this means that the floor will heat up in a matter of minutes, not hours resulting in significant energy savings and greater user comfort.

The other big advantage is that due to the integral fibreglass mesh and cement coating mean that you can lay heating cables/mats directly onto the board and then tile directly over them without the need for a levelling screed.

The boards are available in various thicknesses between 6mm – 50mm making them ideal for both renovations and new floor construction (especially conservatories)

Cross section of flooring showing layers of floor tiles, heating mat, primer and existing floor

Cross section of flooring showing layers of floor tiles, heating mat, primer and existing floor

Adhesive applied to floor

Adhesive applied to floor

Laying heating elements onto floor

Laying heating elements onto floor

Heating elements layed over floor

Heating elements layed over floor

Why not check out our video section on underfloor heating and watch a film for a demonstration on how to install underfloor heating.

Don't fancy doing this project yourself? We work with Checkatrade to ensure that we recommend only reliable and trustworthy tradesmen.

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