Starting From Brick, Plasterboard /adhesive Options

[olly330]

Hello,

I'm renovating my house which recently purchased, bathroom is currently back to brick as the old pb came off with the tiles.

So we are going to dot dab it and use appropriate pb.

Does this have to be waterproof pb all over the bathroom, or just the shower area? Also, does waterproof pb still need tanking in the shower areas or does the waterproof pb in effect have the tanking built in?


Also, I'm regards to adhesive on the walls. Tiles will be going ono fresh pb, defo will not skim.

However, I am reading conflicting information about whether the wall adhesive has to be flexible or not... I read a lot I discussions and no one seems to mention this.

I know for certain that in wet areas we should use water proof adhesive, but I can't find a clear answer on whether the wall adhesive has to be flexible or not?

Other areas around the bathroom such as toilet cubicle/sink we will use bal green star b100 as we are on a budget and can get it for £10 per 15kg tub, is that ok or should we just go for waterproof adhesive in the whole bathroom to ensure no problems down the line.

 

[White Room]

To start there's no such thing as waterproof plasterboard, it all contains gypsum which sucks up water like a sponge.
The green plasterboard is moisture resistant that's all and come's in 8x4's which can be a struggle dragging it through the house, not 6x3's standard board which is far easier to handle.
You can use Wedi, marmox etc 12.5mm for the shower area fixing with the special washers and just tank the joints and standard board 12.5mm for the remaining bathroom.
The adhesive would be water resistant if using a cement based and probably work out cheaper in the long run, single part flexible would be a good choice as it gives you more time to work with.

 

[Flintstone]

The most economical way and right way would be to use normal plasterboard everywhere, then tank the wet area, ideally before fitting the shower tray so you can tank to the floor. Then tile the whole room using a good flexible slow set powder, such as tilemaster setaflex.

 

[Flintstone]

Avoid the buckets of ready mixed.

 

[White Room]

The most economical way and right way would be to use normal plasterboard everywhere, then tank the wet area, ideally before fitting the shower tray so you can tank to the floor. Then tile the whole room using a good flexible slow set powder, such as tilemaster setaflex.

You tank onto the tray otherwise it's worthless....fitting the shower comes first then tank.

 

[Flintstone]

Why would you be better tanking after? Risking a weak spot at the bottom where it meets the tray? Make the whole wall water proof, then put the tray in and Silicon it.

 

[olly330]

Thanks for the replies.

I will go with the bagged stuff then rather than tubbed.

Still not sure as to why flexible adhesive is needed on walls, I can understand on the floor as you walk over it so have movement.

Can anyone recommend a decent wall adhesive that is cost efficient? will be used in bathroom and over bath /shower.

Thanks, Olly

 

[Flintstone]

Most decent adhesive is flexible anyway, and a stud wall may have slight movement.
I can recommend tilemaster, as can many on here, good stuff and easy to use and mix.

 

[olly330]

That helps, so I don't necessarily have to look for 'flexible' on the bag.

Is the below tilemaster stuff ok, and would it be ok for the floors too? It's standard set, and says it can be used for both walls and floors.

Will be putting ceramic tiles on the walls and porcelain on the floors.

Thanks

 

[olly330]

Tilemaster Adhesives - 20kg Standard Set Floor & Wall Tile Adhesive - Grey