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Weber Saint-Gobain - Official website of the company

Tiling with natural stone

Tiles and stones that fall under the 'natural materials' heading vary immensely from ceramics in appearance and indeed their application requirements. Identification of the product being installed is essential to allow for the correct preparation and application.


1. Not all natural stones have the same characteristics

Natural stones by definition are not regulated in terms of porosity and movement.

Sandstone and limestone will be porous, granite and marble will be quite dense, slate could warp.

2. It may be difficult to achieve a flat/level surface

With uncalibrated tiles (i.e. tiles that do not have a constant thickness), such as some slate and terracotta, it is difficult to achieve a flat and level finish on the surface of the tiles.

They also require an adhesive that can be used at a bed thickness sufficient to cancel out the variation in the tiles.

3. Adhesives may shadow through light coloured tiles

Some light-coloured limestone/marble tiles are translucent resulting in the adhesive being seen through the tiles. If a grey adhesive is used this can make the tile appear darker in shade once installed.

A spot-fixed method of fixing should not be used by tilers as it can result in shadows being seen from the tile face where the adhesive is in contact and also increases the likelihood of point-load breakage.

4. Tiles may be susceptible to scratching

Grout can scratch soft glazed tiles (such as hand-made tiles) and the surface of soft stone (such as marble).


Use adhesives and grouts specifically designed for natural stones



These fixing materials include adhesives weberset thick bed, weberset pro lite - rapid, weberset rapid SPF or weberset SPF complimented by weberjoint pro grout.

Stage 1: Identify the tile’s properties

The Weber adhesives identified on this page are designed to be used with all natural stones including very large format tiles. These adhesives are available in grey and white to allow for the properties of the stone (a grey adhesive can show through light coloured limestone and marble).

These adhesives are highly polymer modified to cope with natural movements that some stones undergo with temperature and humidity changes.

Stage 2: Achieving a suitable adhesive bed

weberset thick bed is designed to be applied at bed thickness from 3-25mm, making it ideal for taking up differences in thickness with uncalibrated or riven slate and has a standard setting time to allow for bedding difficulties. Its low slump characteristics also make it ideal when bedding heavy, calibrated stones.

A solid bed of adhesive with no voids, should be achieved when fixing. This will fully support the tile and prevent lines or rings from showing through as shadows.

The spot-fixing method (blobs of adhesive) should not be used.

Stage 3: Movement joints

Should be installed where tiling abuts other materials, over existing movement joints or over junctions of different backgrounds where there is an increased chance of movement such as heating installations or strong sunshine.

Stage 4: Scratching of tile face

weberjoint pro is ideal when grouting handmade tiles, polished marble and any tiles with a soft surface. The fineness of the grout reduces the risk of surface-scratching the tile.

Solution with the following Weber products

Solution 1

weberset pro lite - rapid

A lightweight, rapid-setting, ultra-flexible (S2), low-dust, cement-based floor tile adhesive for interior and exterior use.

weberset thick bed

A flexible, thick bed tile adhesive for interior and exterior use

weberset rapid SPF

A rapid-setting, flexible, low-dust, cement-based floor and wall tile adhesive, available in light grey or white for interior and exterior use.

weberset SPF

A flexible, cement-based polymer-modified tile adhesive for internal and external use

weberjoint silicone

Acetoxy curing silicone sealant that cures to form a tough, flexible, water tight seal – available in clear, white and a range of colours