From £6.53 + 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.

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 is it used?

  • 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.

Frequently asked questions

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.

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.

What is their thermal conductivity?

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

Product videos

Play Video

How Do I install them?

Watch this guide for an overview.

Pricing & shipping

This product will require one pallet space and so shipping is likely to cost between £50 and £100, depending on where you live. Contact Us for a more accurate costing.

Thickness [mm]Weight [kg/sqm]Tile coverage [mm]Tiles per palletPallet covers [sqm]Per pallet [kg]Single tile costTile cost in full pallets
4565280 x 50011415.121060£6.63£5.97
AccessoryLengthsAmount required per m²Cost
Lithotherm 14mm pipe 200 or 500mup to 10m £1.28/m
 Lithotherm manifold connectors2 per 100m loop of pipe £2.38 each

Book your free project consultation

We’d like to hear from you. Call us on 01392 861763 or email us at with any questions or comments.

If you can’t seem to find what you need on our website or you have large quantities of materials to purchase please contact us for a chat and we’ll offer you a more bespoke solution.

We’re normally open from 8.30 am to 5 pm Monday to Thursday, and 8.30 am to 1pm on Friday.