Load bearing?

[AMtek]

I always thought that plasterboard had a load bearing capacity of 20kg/m2 but according to the tta its 32kg/m2?

The maximum weight of tiling which can be supported by a dry, well-adhered plaster background is 20kg/m2, generally equivalent to ceramic tiles with a thickness of 8mm or natural stone tiles with a thickness of 7mm. When fixing directly to unskimmed paper-faced plasterboard surfaces the maximum permissible weight is increased to 32 kg/m2. These weights include adhesive and grout.

Is this correct? (which i assume it is), was i wrong in thinking it was 20kg/m2 (which i assume i was), or am i reading this wrong?

 

[Perry]

yes it correct dont ever plaster it if you can help it

 

[Andy Allen]

yes it is correct, you can put more weight on to plasterboard than skim plaster, you can put even more wieght on to cement boards.

 

[Perry]

and render, plywood, backer board

 

[Rich]

Yeah thats right

 

[DHTiling]

and render, plywood, backer board

Plywood ( wbp) is only 25kg to 30kg..

 

[kilty55]

yes...skim coated plasterboard is 20 k per sq m

plasterboard is 32

 

[White Room]

Render depends on what sand was used, soft sand is not one of them and I've seen it crumbling away from the walls...

 

[AMtek]

I knew that pb could support more weight than a skim and that render and back board could support more weight still i just had the amount of weight wrong. I have just spent 3 hours double checking what i thought to be correct about substrate load bearing. How sad is that!

 

[Perry]

Plywood ( wbp) is only 25kg to 30kg..

sorry Dave i know that was just taking the rise 😳

 

[doug boardley]

I knew that pb could support more weight than a skim and that render and back board could support more weight still i just had the amount of weight wrong. I have just spent 3 hours double checking what i thought to be correct about substrate load bearing. How sad is that!

you should've checked here first