Preparation What tile adhesive to go for?

[Rhodri]

Hi, been looking all day and no closer to finding a suitable adhesive.

It's for bathroom walls, tiling on top of the current glazed tiles on 3 out of the 4 walls. 4th wall tiles have pretty much fallen off so am pulling the others off.

Tiles are 600x300mm and each tile weighs 3.95kgs!

Can't find anything which ticks all three of those boxes. Closest I've found is an evo-stik pre mixed adhesive. Says suitable for on top of tiles and 600x300 but only up to 3.5kgs.

Nothing else seems to come close.

Explores cement based ones but wondering if too difficult for my limited abilities using one of these with shorter pot lifes etc .

Any help much appreciated

Thanks

 

[Rhodri]

Yes I was thinking it's not great! Can't tile straight on to the brick can I?

 

[LM]

Dot and dab and mechanically fix a new substrate like plaster board over the exposed brick work.

 

[Rhodri]

Looks like I will have to. Looks like it's within my skill level!

 

[Rhodri]

I've got some boards on the way. Been doing some reading and keep seeing a figure, that plasterboard can hold 20kg per square metre. My tiles weigh more than that per square metre. Is this going to be ANOTHER problem?

 

[Tile Shop]

bare plasterboard can hold 32kg per sqm inc adhesive and grout.

20kg's is the limit for skimmed plasterboard or normal plaster.

 

[GoneGuy]

You won’t need to skim the boards just make sure you put primer on them before Tiling

 

[Chris N]

Have you dabbed boards on before?

Its not particularly difficult although there is a knack and learning curve to it. Getting the boards flat and plumb is half the battle. I usually do my own boarding before tiling, but had to get over a badly boarded wall recently that i would have usually just ripped off and started again. Not possible in this instance, so had to spend time levelling out with rapid set and going up a notch size. No fun

 

[Rhodri]

Ah I see, great news! Cheers!

 

[Rhodri]

When getting the plaster off... Is this enough or does it all need coming out of each groove and hole in the wall?

Cheers

 

[Rhodri]

Photo doesn't show it too well

 

[LM]

No that should be fine if it's all like that, just make sure to prime it well with atleast two coats of an acrylic or sbr primer.

 

[Rhodri]

Cheers. When the boards are up do they need to be primed also or just tile adhesive straight on to boards? Thanks

 

[Dumbo]

I always prime plaster board in fact there is very little I don't prime

 

[Rhodri]

Great. Thanks!

 

[Rhodri]

Have you dabbed boards on before?

Its not particularly difficult although there is a knack and learning curve to it. Getting the boards flat and plumb is half the battle. I usually do my own boarding before tiling, but had to get over a badly boarded wall recently that i would have usually just ripped off and started again. Not possible in this instance, so had to spend time levelling out with rapid set and going up a notch size. No fun

Sorry I only just seen this reply. No I have not done anything like this before. In at the deep end. Fingers crossed

 

[GoneGuy]

Sorry I only just seen this reply. No I have not done anything like this before. In at the deep end. Fingers crossed

Have a quick look online for some video tutorials to give you an idea

 

[Rhodri]

Have a quick look online for some video tutorials to give you an idea

It's all I've been watching! But am also aware there's a lot of rubbish online!

 

[Rhodri]

Is Mapei primer G suitable?

 

[Qwerty]

Is Mapei primer G suitable?

Yes, Primer G is a perfect primer ..... read the dilution instructions properly

 

[Rhodri]

My Mrs old man is a plasterer by trade, nowadays more office based. He said if I get a bag of bonding he will bond it and can tile straight on to the bonding. I'm not so sure? Is that a good idea?

 

[Dumbo]

No adhesive manufacturer will recommend doing that as it only 1 part of a 2 part system

 

[Chris N]

My Mrs old man is a plasterer by trade, nowadays more office based. He said if I get a bag of bonding he will bond it and can tile straight on to the bonding. I'm not so sure? Is that a good idea?

Not really. Better off dabbing on Plaster board and if its done right, you'll have lovely flat and plumb walls that will carry the weight of the tiles.

 

[Rhodri]

I thought as much. Rather be safe than sorry. It's only about 2 quid extra to get boards and dot and dab a 14m2 room than it is to bond it by my workings

 

[Bond]

Cement based tile adhesive direct onto bonding plaster is a definite ,no,no.

 

[Rhodri]

Last question (I think) can I use any old grout provided it's bathroom suitable?

 

[Rhodri]

Boarding done. Went okay I think. Two bits of worry to me are in the pictures. Anything I can do about them? One I've messed up the corner and it's folding away. The other the paper just seems to be coming away from board, don't know why?

 

[Qwerty]

You have fitted the boards the wrong way around. The Ivory face should be visible. Some say it doesn't matter, but I've seen similar failures when this has been done in the past. Your boards look soaking wet too and at this time of the year it can take a while for it to all dry out depending how wet the drywall adhesive was and the humidity in the room.

 

[Qwerty]

Plasterboard sheets dot & dabbed correctly. However on the second sheet you can see one small wet patch where the paper face just 'shed' off the board when wiped.

 

[Rhodri]

I thought that, Mrs old man helped me and I said to him it says put other way round and he said one side for artex and other for plastering or some rubbish! Knew it should have gone on the other way round but how can I tell someone who should know that!!!

So the bubbles will go when adhesive dries?

 

[Qwerty]

So the bubbles will go when adhesive dries?

Unlikely. The bubbles would be the least of my worries, I would be concerned about how well the boards are fixed