PVA'ing new plaster?

LJS2014

Hi All,

Looking for advice please.

We have just had our kitchen re-plastered in preparation for the new kitchen to go in. The plasterer told us once it's completely dry we should put a coat of PVA (1 part PVA to 5 parts water specifically,) over the plaster before we paint.

Is this right? I've never heard of this before and googling it threw up lots of contradicting arguments for doing/not doing.

Has anybody done this? Would you advise for/against doing it? I thought we would just give the plaster a week to dry and then paint it :rotfl:

Thanks in advance for any replies, experiences you may share on this :beer:

MX5huggy

I wouldn't, just a mist coat of standard emulsion seems to work.

phoenix_w

You should do a mist coat (watered down cheap emulsion) for painting, or watered down PVA if you're going to tile.

DRP

Try screwfix paint for bare plaster - just used it on my extension and was great. One coat, then 2 coats of my 'topcoat'. Sorted.

I thought PVA was a no-no?

DigForVictory

We were advised to slap a layer of 50:50 emulsion & water on to "soak into" the plaster before sticking the full emulsion on. PVA diluted sounds like the shrewd undercoat before painting an area which will get wet.

The whole breathability palaver is an area I do not profess to understand, but if you've paid the plaster solid sums to get a wall flat & handsome, & They recommended PVA knowing what you plan to do, I'd go with their local knowledge...

Grenage

DO NOT PUT PVA ON A WALL YOU PLAN TO PAINT!

I don't care what the plasterer told you, you'll ruin paint adhesion. In some circumstances you might mix a tiny amount of PVA to the paint you're using, but don't go painting the walls with a 50% mix before regular painting.

Just use a normal water+paint mist coat - you cannot go wrong.

EmmyLou30

If you plan on ever painting it, then no to the PVA (not sure what kind of plasterer worth his salt would ever suggest such a thing quite honestly). A simple mist coat of 50:50 matt emulsion (not silk) and water will suffice. That's what we've done on our new plaster and it's worked perfectly and the new paint has stuck properly. In my friends new build they didn't bother with the mist coat (I assume this is fairly standard sloppy developer practice to save time and money as they don't have to live with the consequences) - the result is paint pulling straight off if you use any sort of masking tape or attempt to sand the wall.

daveyjp

Grenage wrote: »

DO NOT PUT PVA ON A WALL YOU PLAN TO PAINT!

I don't care what the plasterer told you, you'll ruin paint adhesion. In some circumstances you might mix a tiny amount of PVA to the paint you're using, but don't go painting the walls with a 50% mix before regular painting.

Just use a normal water+paint mist coat - you cannot go wrong.

We had all our walls replastered and PVAd. All are painted and no problems whatsoever with adhesion.

Grenage

And I've got a grandad who smoked 2 packs a day and lived into his 90s

Painting a wall with PVA that you have no intention of skimming is generally a terrible idea.

Lungboy

The pva seals the plaster, stopping it from breathing while simultaneously being rubbish for paint to stick to. I second the Screwfix bare plaster paint, you don't need to water it down and it goes on very nicely.

gingernut352000

No to the pva and mist coat of dulux trade super matt and a couple of top coats and no to vinyl silk for at least a year it needs to breathe