a technical question

[leonard]

Hi dear members I am recently new to tilers forum and have not had any technical issues to ask until now, i have recently plastered a bath room for a customer and he wants the 2 main long walls tiling 11ft long x 8ft 4inches high, he has purchased a natural slate tile that is approx 10mm thick, the front of the tiles has been machined and polished, the thickness varies in differant places on each tile as they have not been callibrated, tiles are 600mmx300mm, once the fronts have been sealed and the new plaster treated with a good quality pva, what addhesive is required to put them on the walls, i have spoken to 2 local tile show rooms and they have gave 2 differant answers, i would greatly appreciate help in a proffessional opinion from fellow tiles forum members. thanks Leonard

 

[Dan]

Welcome to tilersforums.com | Tile Forums | Tiling Forum!

Hello leonard, welcome aboard www.tilersforums.com. Stick around, I'm sure you'll like the place.

 

[diamondtiling]

Welcome to the forum........

First off forget pva, it has no place in any tiling situation, instead use an acrylic bond.
You need to check your weight issues with those tiles and you would have been better not plastering the walls. Bagged adhesive is your only option and it should be a good quality one part flexible, Mapei cater for all your needs, have you a Tilegiant near to you?
You need to start with the thickest tiles and work down to the thin ones.
Also have you considered tanking the walls in the bathroom because you need to if they are going to have constant water on them from a shower.

What are the two tile shops advising you to do?

 

[albyshellshear]

Hello Leonard I think the pva is a bad idea as pva is a big NO when tiling you need a good primer plus are the walls skimed you need to read a few of the threads on here about pva and plaster weight issues espesialy since you are using very large heavy slate someone will point you in the right dierction I am sure by the way :welcome:

 

[Dave Ramsden]

Morning Leonard,

First of all, :welcome: to the tilers forums. Your sure to find every answer you need right here!

As the tile chosen for the job is so thick and heavy you really need to consider screwing hardi-backer board across the area before tiling as skimmed plaster can only hold a load of 20kg per sq/m.

PVA is not a suitable primer as it only forms a skin over the substrate to which the adhesive you use wont adhere properly.

You need to be using some sort of flexible adhesive (preferably a similar shade colour as your chosen grout). I would recommend a flexi slow set rather than flexi rapi-set if your not skilled with working with this type of material.

Hope this helps.

 

[albyshellshear]

Beat me to it Dom nice one mate leonard listen to this guy (diamondtiling) he knows his stuff ....Alby

 

[david campbell]

while p.v.a i sstill widely used in plastering it is totally tabboo in tiling
http://www.tilersforums.com/tile-ad.../2511-p-v-versus-primers.html?highlight=p.v.a

i would also consider using hardiebacker or a suitable cement board to cope with the weight,also as above seperating the tile into different thicknessess will help

 

[Alan.P]

Some sound advice above, as has been said, your substrate is NOT suitable for your tile type, is it plastered dry wall or block?

 

[mikethetile]

:welcome:no point me saying anything as its all been said:lol:

 

[united]

:welcome: to the forum

No point in repeating the above advice

 

[Rich]

:welcome:
It seems that you have all the answers you need above, you wont find anybody on here that will disagree, PVA a no no and well worth looking at over boarding with a backer board like No More Ply or HardieBacker. Top advice gents

 

[DHTiling]

Hello and welcome... Top advice above,,

 

[Diamond Pool Finishers]

hi:welcome:to the forum

 

[White Room]

Hi and welcome

 

[The Legend; Phil Hobson RIP]

Hi mate and :welcome: all good advice above. Nothing to add, guess you realise by now. PVA is a no-no, Sbr is the way to go, and take onboard weight issues'. Keep asking