Page 11 - Tiling Guide Uniclass Index

6 WEIGHT LIMITS FOR WALL TILING
The following table offers general guidance for common types of backgrounds and the maximum recommended weights for tiling.
NOTE
Where multiple substrates are installed using only adhesives, e.g. tile backer board bonded to plaster,
the substrate with the lowest value will determine
the recommended maximum weight of tiling. Tiling is defined as a tile plus its bedding and grouting material.
* Provided the rendering has sufficient composition and has been installed correctly to achieve high strength.
** Guide figures only. Certain boards may be capable of carrying greater weights – consult with the board manufacturer.
Wall substrate
Maximum weight of tiling per m2
Gypsum plaster
20kg
Gypsum plasterboard Skimmed
(12.5mm thickness)
Unskimmed (12.5mm thickness)
20kg
32kg
Cement:sand rendering
Generally no restriction*
Lightweight foam-cored tile backer boards
60kg**
Glass reinforced cement- based boards
50kg**
Gypsum fibreboards
40kg**
Other rigid tile backer boards
Consult manufacturer
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