Weight Limits For Tiling Walls

Brick, plaster or cement board – what your substrate means for your tile choice

Wall SubstrateMaximum tile weight
Cement:sand renderingGenerally no restriction A
Gypsum plaster
Gypsum plasterboard (12.5mm thickness)32kg/m2
Gypsum fibreboards40kg/m2 B
Glass reinforced cement-based boards50kg/m2 B
Lightweight foam-cored tile backer boards60kg/m2 B
Other rigid tile backer boardsConsult manufacturer
A Provided the rendering has sufficient composition and has been installed correctly to achieve high strength
B Guide figures only. Certain boards may be capable of carrying greater weights – consult with manufacturer for confirmation

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. In this context tiling is defined as a tile plus its bedding and grouting material

British Standards Institution (2018) BS5385-1:2018: Wall and floor tiling. Design and installation of ceramic, natural stone and mosaic wall tiling in normal internal conditions. Code of practice. Available at: bsigroup.com