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Technical Advice


The following advice is provided as an initial indication of things that you must consider. Unless you are fully qualified, we would always recommend that you seek the advice of a professional tiler or installer. They will be able to give you the exact advice and help you need, based on the actual site where the stone will be installed.

You can also contact Stoneworth Warehouse for further technical information by calling: 0844 915 0009.

Solid floor substrates

Generally speaking, the best floor surface to fix stone to is a sand and cement screed. You should check that the screed is definitely sand and cement and not an anhydrous screed. Anhydrous screeds require special preparation.

General preparation

If the screed is old or uneven then a certain level of preparation will be needed.

Underfloor heating

Underfloor heating generally works very well with stone. Underfloor heating for solid floor substrates comes in two key forms; a heated screed, in which hot water pipes or electrical cables are buried; and under-tiled heating, in which an electric mat or loose cables are laid over the top of the screed just under the tiles.

Non-solid floor substrates

Stone can be installed to most non-solid substrates – but careful preparation is needed.

Fixing stone to walls

When fixing stone to walls, it is a good idea to select a thinner stone. Also a smaller format will be simpler to fit – particularly on uneven walls. Some circumstances may require a mechanical fixing system to be used as well as the normal stone adhesive.

Solid-wall substrates

The best solid wall substrate to fix stone to is a sand and cement render. Plastered walls will need scoring and priming before fixing stone.

Non-solid wall substrates

The best non-solid wall substrate to fix to is a proprietary tile backer board, which will be specifically designed to receive tiles. A plasterboard wall may not be strong enough to support the weight of some thicker stones, while plywood can be subject to movement which makes it more challenging to receive stone.


All substrates must be prepared in accordance with the relevant British Standards

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