Wall tiling on new plaster...

[Maz]

Anyone done bathroom wall tiling before? Would I need to put some sort of primer/sealant on newly-plastered walls? Thanks.

 

[rodgy-dodge]

You should leave your new plater to cure for a few weeks first, to make sure they have fully dried out then seal it with acrylic primer. Dilute the first coat and use a flexible cement adhesive to apply your tiles.

 

[rodgy-dodge]

'Plaster' that should have read

 

[Maz]

Acrylic primer - i know the stuff...thinnish milky white stuff (i think). Thanks, RD.

 

[Arch]

Acrylic primer - i know the stuff...thinnish milky white stuff (i think). Thanks, RD.

No, you're thinking of milk...

 

[slowmotion]

The TilersForum has a whole shedload of information about all aspects of tiling. I signed up when I needed to find out stuff about laying some limestone. Here's what they say about sealing...

http://www.tilersforums.co.uk/tile-...paration/10007-wall-sealant-prior-tiling.html

Good luck

 

[Pat "5mph"]

[QUOTE 1813148, member: 9609"]You would probably get away sealing it with some diluted PVA glue 6:1 then another coat 3:1. But you should seal it with something! The Acryilic stuff is what you should be using, but I have never seen any problems with PVA[/quote]
Done it twice, that is sealing surfaces with diluted PVA, then tiling. Once I sealed plasterboard (maybe this was not really needed) and once I sealed a freshly plastered wall after about a week that the plaster was applied. In both cases the tiles, years later, are still up

 

[Maz]

I got some of this stuff:

 

[Pat "5mph"]

Follow the instruction on the container for diluting with water, apply liberally with a BIG paintbrush, let it dry for a day or so. Happy tiling!

 

[slowmotion]

Like other people, when I tiled our bathroom I just used an all purpose PVA sealer/bonder diluted 5:1 or so. The tiles are still there after a couple of decades so it can't be quite as bad as the pros on the TilersForum make out.

 

[the snail]

Like other people, when I tiled our bathroom I just used an all purpose PVA sealer/bonder diluted 5:1 or so. The tiles are still there after a couple of decades so it can't be quite as bad as the pros on the TilersForum make out.

The problem with PVA is that it can re-emulsify if it gets damp, so best to use a waterproof sealer.

 

[Dewi]

The problem with PVA is that it can re-emulsify if it gets damp, so best to use a waterproof sealer.

Very true, if you need a bonding agent anywhere that isn't 100% dry then SBR is the only answer.
http://www.everbuild.co.uk/products/23,Building Products/24,PVA and SBR Bonding Agents/1

Another trick is not applying a skim coat, you can tile on top of a sand and cement undercoat