Tile weight limits on plaster

[DHTiling]

I want to clarify who is wrong all this time..LOL..

Plus i have asked if this is the limit to base coat with skim then does this apply to skim on plaster board.. lets get a final answer and if wrong BS 5385 needs amending.. ASAP..

 

[DHTiling]

Ok.. According to the TTA, the advice is not really correct from british gypsum, we as tilers should use BS5398 as our guidance and not notes by others.

Hi, I have emailed you ( TTA) direct as you might have this answer quicker than just going to independent adhesive suppliers.

BS5385 states that tiling to a plastered background has weight limitations of 20kg per sqr mtr to include tiles and adhesive/grout.

This we take is a skim coat to a base coat.. BS5385 does not differentiate between a skim coat to plaster board or a skim coat to a base coat, so as fixers we use the same weight limit on both so to coincide with BS5385 standards.

Now getting to my reason for the email, it has been pointed out by a member of our Tilers forum that this weight should also include the weight of the plaster over the base coat, this is the recommendation from british gypsum and if this is the case then BS 5385 is giving the incorrect advise , along with the TTA and also we as members of Tilers forums.co.uk.

Now this could have some difficult implications if a person were to have a weight failure don’t you agree.

I have added a link to the PDF from bristish gypsum and if you could take a look please and see if you as the tiling body of the uk read this the same way we have. Broken Link Removed because if this is the case then BS5385 needs amending as does any other data published.

I do hope this is just an over sight on british gypsums side , I look forward to any advice or anything to clear this up ..

Many thanks ..

and the very speedy reply from the TTA.

Thanks for your email.

British Standard BS5385 is the code of practice for fixing wall and floor tiles and is the basis for all tiling works carried out. In part 1 where reference is given to tiling to a plaster background it states
"The plasterwork should be firmly bonded to its background and be sufficiently strong to support the specified tiling. The maximum weight of tiling which should be supported by a dry, firmly adhered plaster background is 20 kg/m2"

This statement should clarify the matter in terms of what is included in the weight restriction. There has been discussion over the definition of "tiling" in the above phrase, and it has been agreed that this refers to the tiles and adhesives.

TTA has published a guidance note on tiling to gypsum plaster. Click here to read full details.

The point that tilers need to understand is that the use of a skim coat will reduce the weight limit on plasterboard, for example, from 32 kgm2 to 20 kg m2. I agree that the comment in the Thistle sheet could be seen to be ambiguous, so the advice to any tiler is to use British Standard BS5385 as their "bible".

We would suggest you also let your forum readers know about the guidance document we published, which is freely available on our website

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So i hope this clears this up and we stick to advise BS5385 as OUR standard for Tilers forums.co.uk..


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[diamondtiling]

Great Dave, that was something that needed clarifying asap.

 

[Alan.P]

Nice one Dave, great to know, I can sleep at night again lol

 

[White Room]

Good information there.