Page 7 - Tiling Guide Uniclass Index
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      They typically require the use of a polymer enhanced cement based adhesive. The use of a ready-mixed adhesive is not recommended.
Natural Stone Tiles
Natural stone tiles include limestone, marble, granite, slate, travertine, quartzite and sandstone. Whilst some natural stone tiles are extremely
hard wearing, the performance of these materials does vary, and you should seek guidance on their suitability for your project. Some natural stone
tiles may require the use of adhesives and grouts specifically designed for the installation of natural stone tiles. Some natural stone tiles may need to be sealed before grouting to avoid staining.
Terrazzo
Either pre-manufactured or laid in-situ, terrazzo consists of granite and marble chips in a Portland cement, or sometimes resin binder. They can be polished to give a low absorbent and high strength surface.
Rectified Edge
Rectified or sharp edge tiles have been cut to near exact measurements with an almost perfect straight edge. Each of the four sides will be at a 90° angle to the top and bottom faces of the tile meaning that the edges are perfectly symetrical, creating a more uniformed look.
Agglomerate
This type of tile is manufactured by mixing graded pieces of granite and marble with cement and resins to give a pre-formed tile. They generally have low water absorption. Refer to the manufacturer’s advice for fixing instructions. Some agglomerated stone tiles are particularly sensitive to expansion with moisture and heat, leading to curling or lipping, and may require the use of a resin adhesive.
Mosaic Tiles
These are small pieces of ceramic, natural stone or glass usually sold in sheets on a mesh backing or paper facing for ease of fixing. Thin bed solid bed fixing is recommended.
Glass Tiles
Manufactured from glass, and available in many striking opaque colours. They can be manufactured in small sizes on mosaic backings and are available in much larger formats. They are very hard and offer extremely low porosity. Typically a minimum of a C2 classification cement-based adhesive is required
but some decorative tiles may require resin-based adhesives. Extra care should be taken when grouting to prevent scratching.
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