Priming a wall for tiling

Question

My partner is planning to prime the plaster wall with PVA before tiling. I think he should use a proper primer but he says it's a waste of money as we already have some PVA in the house. Who's right?

Ashley · Accepted Answer

Hi, a good quality tile primer should be used like a SBR primer, pva is for plastering not tiling !!!

Stefan · Answer

No necessary , Just if you wanted  i never put on the wall primer

Neil · Answer

If its a newly plastered wall,Then prime it with pva will be ok to use mix it 50/50with cold water....

Carl · Answer

PVA is more than enough for primer you don’t need to use any other type of primer. I would definitely recommend using PVA though because the plaster will suck the moisture out of the adhesive.

Majud · Answer

It depends, Prime the walls to seal them. If you are tiling a wet, damp, or moisture room, I recommend using an SBR based primer. For walls in dry environments, you can also use PVA. This will create a good bond for the tile adhesive and prevent potential issues with overly porous or non-porous surfaces.

Greg · Answer

Hi,

You can apply PVA  to any new drywall or plaster walls before painting, tilling. We mix 50/50 with water.

Benjamin · Answer

If it's freshly plastered walls, and it has a Matt finish to it almost then PVA is absolutely fine, but dilute with water at a rate of around 50:50...
If the plaster has a shine to it, ie polished plaster finish then PVA at the same dilution will work but wouldn't permiate into the plaster as well and may possibly fail at some point...
Correct primer for tiling, would adhere, dry quicker, and most are guaranteed against mechanical failure. They also have an additive to assist in quicker cure / set times for tile adhesives and are worth the small cost for peace of mind!...
So if you have a rough finish plaster then PVA mixed with water at half and half will be perfectly fine as there's a sufficient "key" to attach to, but if a polished plaster finish, then tiling primer is by far your best and safest option!...
Hope this helps and good luck with your project...

Matthew · Answer

Along as the PVA is watered down then it will be fine. If its out on neat it will create a barrier and will ultimately peel causing the tiling to fail

Arjan · Answer

He’s right you can use  ova you have got it is right one

Mark · Answer

All depends on the type of plaster boards that have been used etc blue or green .

Priming a wall for tiling

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