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Efficient underfloor heating tiles – Lithotherm

Lithotherm underfloor heating system is:-

  • an ideal underfloor heating system for use with air/ground source heating
  • a very fast underfloor heating installation, allows floorboards to be fitted same day.
  • a dry, 45mm screed replacement, creating a thinner screed layer with absolutely no dry time.
  • used where faster response times are important, keeping heating costs down.
  • part of the Lithowood alternative to concrete floor slabs. 

Prices: from £4.37 + VAT per tile

Efficient underfloor heating tiles – Lithotherm

Lithotherm underfloor heating system is:-

  • an ideal underfloor heating system for use with air/ground source heating
  • a very fast underfloor heating installation, allows floorboards to be fitted same day.
  • a dry, 45mm screed replacement, creating a thinner screed layer with absolutely no dry time.
  • used where faster response times are important, keeping heating costs down.
  • part of the Lithowood alternative to concrete floor slabs.

Prices: from £4.37 + VAT per tile

Close-ups.

Take a closer look at this product with these additional images.

Image description: This shows the specialist pipe used in the Lithotherm system.

Image description: This is a close-up of the manifold connectors that connect the Lithotherm pipes to standard metric/euro manifolds

“After following the procedure supplied by Back to Earth, it become apparent as to how simple it is to tile onto this UF system. Firstly I laid the mesh onto the surface of the thermal tiles, then spread a layer of adhesive over the mesh ensuring the adhesive is pushed through the mesh to create a solid bond leaving a layer over the mesh of approx 3 mm. This was done over the whole floor. Once this had dried I could then tile using a porcelain tile following the correct procedure re expansion joints etc” – Ken Malins, Tiler

 

Product overview.

Where is it used?

  • The Lithotherm system is best suited to solid floors and normally sits on top of the insulation layer.
  • The interlocking tiles allow tiled and floating floors to be laid over the top of the system and special profiled timber battens allow floor boards to be fixed down.
  • Can be laid over Foamglas aggregate to create floors without concrete slabs.

How much will you need?

  • Lithotherm underfloor heating tiles are 500 x 280mm and 45mm thick, they cover an area of 0.14 m² per tile meaning there are 7.1 tiles per m².
  • Allow at least 5% for wastage depending on the complexity of the layout.

How do I use it?

  • When laying the Lithotherm UFH System on to insulation it is important that the substrate is solid and does not move.
  • If laying directly on to a concrete floor it is advisable to use a thin layer of an underlay material, such as the UdiSTEP wood fibre product. 
  • For tiled or floating floor applications the interlocking Lithotherm tiles are laid in a brick bond pattern across the floor, leaving a 15cm perimeter at the ends of each pipe run to allow the pipes to loop round.
  • For more information please see the installation video (A very good graphic guide but text currently only in German) and click here for more detailed instructions.
Technical Details

Are they heavy?

  • The tiles weigh 65kg per m² or around 9.15kg per tile. When used on suspended floors this weight must be considered as part of the loading.

What is their thermal conductivity?

  • The Lithotherm tiles are not designed to be a thermal insulator, infant they are quite the opposite and designed to disperse heat as well as possible. However, their thermal conductivity is around 0.89 W/mK.

How strong are they?

  • The Lithotherm tiles have a compressive strength of 9.64 N/mm² so are stronger than a normal concrete block. They have a flexural strength of 2.03 N/mm².
How Do I install them?
  • Watch this guide for an overview.

Product overview.

Where is it used?

  • The Lithotherm system is best suited to solid floors and normally sits on top of the insulation layer.
  • The interlocking tiles allow tiled and floating floors to be laid over the top of the system and special profiled timber battens allow floor boards to be fixed down.
  • Can be laid over Foamglas aggregate to create floors without concrete slabs.

How do I use it?

  • When laying the Lithotherm UFH System on to insulation it is important that the substrate is solid and does not move.
  • If laying directly on to a concrete floor it is advisable to use a thin layer of an underlay material, such as the UdiSTEP wood fibre product. 
  • For tiled or floating floor applications the interlocking Lithotherm tiles are laid in a brick bond pattern across the floor, leaving a 15cm perimeter at the ends of each pipe run to allow the pipes to loop round.
  • For more information please see the installation video (A very good graphic guide but text currently only in German) and click here for more detailed instructions.

How much will you need?

  • Lithotherm underfloor heating tiles are 500 x 280mm and 45mm thick, they cover an area of 0.14 m² per tile meaning there are 7.1 tiles per m².
  • Allow at least 5% for wastage depending on the complexity of the layout..

Are they heavy?

  • The tiles weigh 65kg per m² or around 9.15kg per tile. When used on suspended floors this weight must be considered as part of the loading.

What is their thermal conductivity?

  • The Lithotherm tiles are not designed to be a thermal insulator, infant they are quite the opposite and designed to disperse heat as well as possible. However, their thermal conductivity is around 0.89 W/mK.

How strong are they?

  • The Lithotherm tiles have a compressive strength of 9.64 N/mm² so are stronger than a normal concrete block. They have a flexural strength of 2.03 N/mm².

Material in action.

Here you can see Ken Malins applying the mesh and flexible tile adhesive to bond the surface of the tiles together and allow the laying of the  intended tiles. This installation was on a suspended first floor structure within a Carpenter Oak timber framed house.

Prices & Shipping

Here you will find pricing and shipping estimates. To get a fixed quote, please call our technical team on 01392 861763 or get in touch via the form below.

Each tile is 45mm thick and 500mm long and 280mm wide, 0.14m2. Each pallet contains 108 tiles or 15.12m2.

Thickness [mm] Weight [kg/sqm] Tile coverage [mm] Tiles per pallet Pallet covers [sqm] Per pallet [kg] Single tile cost Tile cost in full pallets
45 65 280 x 500 108 15.12 1020 £4.96 £4.46

 

Accessory Lengths Amount required per m² Cost
Lithotherm 14mm pipe  200 or 500m  up to 10m  £1.25/m 
 Lithotherm Timber Profiles  2.4m 2.3m £3.25/m
 Lithotherm manifold connectors     2 per 100m loop of pipe  £2.42 each 

 

Carriage is typically calculated at £65 + VAT per pallet and all orders will be sent on a pallet. This price does vary if delivery is required to remote locations. If you require only a few boards we may be able to get slightly cheaper shipping so please contact us for a more accurate price.

Request an estimate.

In summary, if you are looking for more than just a builders’ merchant, we might be the guys to talk to.

Request an estimate.

In summary, if you are looking for more than just a builders’ merchant, we might be the guys to talk to.

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