Which adhesive for plasterboard?

[Duchard]

Can anyone tell me which adhesive is best to use when applying straight to new plasterboards?

My tiles are ceramic 30x20. I will be tiling a bathroom and wetroom area.
From what I can understand applying PVA to the boards is a big no no as the PVA may become loose if water gets in.
Im looking at BAL ready mixed products here but not sure which one exactly. Does it matter as long its waterproof?

I will be boarding the wetroom with aqua panels and tanking the area up to about 2m to ensure no leakage.

Any advice greatly appreciated before I charge on.

 

[DHTiling]

Hi..

Personally i think you are better using a bagged adhesive rather than a tubbed dispersion one..

For me it would be mapei P9 for those tiles..

 

[kilty55]

if your tanking definately use a bagged cement based adhesive,another tip if your using white grout on your walls buy a white adhesive

 

[Duchard]

Thanks Dave

I have only used tubby stuff before when tiling. Can I mix like plasterboard adhesive and just add water until its a decent consistency?

Is it generally cheaper this way also?

Also do I not need to prime using this stuff?

 

[DHTiling]

It is a cement based tile adhesive and is cheaper and easier to use the tubbed gear.. just mix to a none slump consistency and tile as normal.. slow setting is better for not so quick tiling..

 

[Duchard]

Kitty, Whats the advantage of using a cememt base adhesive in a wetroom? Is it stronger? Do I need to still prime beforehand or does the tanking take care of this?

Thanks
​

 

[DHTiling]

Here kitty kitty..:lol:

 

[aph257]

Defo use a single part cement based addy, my pref would be Biscem Xtra. i like it and have a good local supplier and also cheaper than i can get the Mapei for. each to their own and all that. Defo DO NOT use PVA. but good decision to tank the aquapanel as well.

 

[kilty55]

hello duchard,kilty shall suffice my good friend :lol:,cement based addhesive will hold a larger tile and is also stronger than your tubbed stuff and its properties are far superior so for a wetroom yes use it using white will help you when you come to grout as well if your choosing a light grout that is,as for the tanking if your going to use a roll on/paint on kit then the mapei one comes with a bottle of primer g,aplly this to your boards then tank you can of course use a membrane say for example the homelux kit,you apply it with adhesive and float it onto the wall and you can tile straight away saving you time

 

[Duchard]

Apologies there Kilty.

So cement based would seem to be the preferance. Still not sure if I need to prime my boards which are not in the wetroom?

 

[aph257]

Apologies there Kilty.

So cement based would seem to be the preferance. Still not sure if I need to prime my boards which are not in the wetroom?

Correct you don't need to.

 

[Daz]

If you are using a cement based adhesive, I would suggest priming all boards with an acrylic primer prior to fixing.

You should, also, prime the boards prior to fixing your tanking system to the wet area, too.

Good luck.

 

[Duchard]

Confused now...

:huh2:

 

[doug boardley]

as above, and yes, I prime plasterboards with acrylic primer. See what adhesive (brand) you get and then get the compatible primer

 

[Olz]

If your in any doubt, then when you go to purchase your adhesive, read the back of the bag, it will tell you what substrates that particular manufacturer reccommends you prime, and which it doesnt.

It will usually suggest which primer to use, (from the manufacturers own range). The guys in the suppliers will also be able to guide you through the products they stock.

If your in any doubt, let us know what adhesive you get and we'll take it from there.

Mapei P9 like dave says, is what id be going for. You will find most suppliers stock it, have you got a Tile Giant near by.

Avoid the DIY sheds and go to a proper suppliers.

 

[Duchard]

So anyone know if the Mapei or Biscem recommendations need a primer?

 

[DHTiling]

Best to prime.. then you can prime any cut edges on the boards.