maximum tile and adhesive/grout weights per sq metre

[shoestring]

Hi there. Can anyone let me know if there's a difference between maximum permissible weights on skimmed plasterboard and plastered brick/block wall? I've got the latter and I'm looking at 25kg per sqm.
Any advice would be great. Cheers.

 

[jctilingservices]

The maximum weight of tiling which can be supported by a dry, well-adhered plaster background is 20kg/m². This is equivalent to ceramic tiles with a maximum thickness of 8mm plus tile adhesive or natural stone tiles with a maximum thickness of 7mm plus tile adhesive

The weight of tiling to a plasterboard background direct (without plaster skim) should not exceed 32kg/m². This is equivalent to a ceramic tile and adhesive with a maximum thickness of 12.5mm and natural stone and adhesive with a maximum thickness of 10mm.

It is important to emphasise that the weights quoted includes both the tile and adhesive.

Further advice should be sought either from the manufacturer, regarding the suitability of the adhesives and grouts and also guidance must be sought from board manufacturer regarding additional information on recommended methods for the installation of boards.

The following table offers general guidance to some common types of building board and the maximum recommended weights for tiling.

Wall Substrates Maximum Weight of Tiling per m²

Gypsum Plaster 20Kg/m²

Gypsum Plasterboard Direct (without a plaster skim) 32Kg/m²

Plywood (WBP) Up to 30Kg/m²

Lightweight Tilebacking Boards* Up to 40Kg/m². Dependant upon the type and thickness of the board.

Glass reinforced Cement Sheets Up to 50kg/m², Dependant upon the type and thickness of the board.

Gypsum Fibre boards Approximately 35- 40Kg/m²

 

[Richard C]

Great; gonna book mark this one

 

[jctilingservices]

Great; gonna book mark this one

Richard, this might be more appropriate for you mate




Tile and Adhesive Weight Per Square Metre

Weight per sq metre (Kg) for 3mm thin bed solid bed adhesive

application Weight per sq metre (Kg) for 6mm thick bed solid bed adhesive application

6mm thick glazed tile 14.26 Kg/m2 18.46 Kg/m2


8mm thick glazed tile 17.62 Kg/m2 21.82 Kg/m2


10mm thick glazed tile 20.97 Kg/m2 25.17 Kg/m2


12mm thick glazed tile 24.32 Kg/m2 28.52 Kg/m2


12mm thick quarry 26.40 Kg/m2 30.06 Kg/m2


10mm thick porcelain 23.88 Kg/m2 28.09 Kg/m2


12mm thick porcelain 27.82 Kg/m2 32.00 Kg/m2


10mm thick natural stone 31.10 Kg/m2 35.30 Kg/m2


12mm thick natural stone 36.48 Kg/m2 40.68 Kg/m2


20mm thick natural stone 58.00 Kg/m2 62.20 Kg/m2



Tiles of over 8mm thick should not be fixed to plaster (maximum

permitted weight is 20Kg/m2), however all the tiles above could be fixed
to Marmox tile backer board.

Maximum Permitted Weights

These are maximum permitted weights per m2 of tiles and adhesive combined:

Plaster 20kg/m2

Plasterboard 32kg/m2

Render 40kg/m2

Marmox Tile Backer Board 62kg/m2


Hope this is more informative for you mate

 

[shoestring]

Wow, thanks Jimmy for the super-detailed reply.

 

[Richard C]

Thanks again JCT, usefull stuff ; the more common general weights are engraved in my brain but it’s useful to have a detail compilation of this sort of thing in one place as a look up guide.