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Confused about 'rectification', or unfamiliar with terms like 'back buttering'? Whatever your existing knowledge, this is a layman-friendly guide to all terms tiling related.

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Uncoupling Membrane

Impervious sheet material used as a separating layer between substrate and screed.

Unglazed Tile

A hard, dense through-bodied tile which derives its colour from the materials of which it is made.  It will normally require sealing before use.


Voids, pits and holes within travertine have not been filled prior to installation. However, they can be grout filled.


Ceramic tiles that have been chemically altered during the firing process to yield high water resistance, typically with water absorption below 3%.


Tiles with a water absorption greater than 3%, but less than 7%.  Suitable for indoor use only.

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