To use PVA in paint or not? That is the question.

Painting and decorating, plaster mouldings, Artexing questions

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jozeffo
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Post by jozeffo » Tue Sep 15, 2009 8:45 am

PVA costs £ 7 for 5 litres which makes 30 litres of wall primer. I think it was economics that caused this problem. Try buying paint for that price.

I have just finished a large contract with Labour supplied by the client. To avoid any problems, I insisted on the safest route I know. That is Super Leytex £ 17 for 15 litres watered down by 15% for the mist coat. This is cheap, easy to mix and is microporous so you can paint it onto dark (damp) plaster and the moisture can breathe out.

I have committed all sorts of sins with PVA in the past. Modern paints are very forgiving and I haven't had any complaints or comments as a result. I am happy with the above spec which seems foolproof.
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Post by spottie » Fri Sep 18, 2009 12:23 pm

wot are you on about?
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Post by jozeffo » Fri Sep 18, 2009 6:13 pm

Spottie, why dont you ask a grown up to explain it for you.
biggerbyfar
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I've just been advised to...

Post by biggerbyfar » Sat Nov 07, 2009 1:14 pm

(Bathroom stripped back to old plaster and the odd bit of paint still attached)

Super-Latex all 4 walls and ceiling.

Then PVA the ceiling

Then paint ceiling with a durable matt topcoat.

The other walls are then to be tiled.

Sound sensible?
handyman
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Post by handyman » Sat Nov 07, 2009 2:45 pm

no
biggerbyfar
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Post by biggerbyfar » Sun Nov 08, 2009 12:57 am

handyman wrote:no
......because?
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Post by handyman » Sun Nov 08, 2009 7:42 am

you are joking .......yes?

On this very thread you are posting on, it states quite clearly several times, that you dont mix pva with paint in any way. (makes it even worse doing this in a bathroom)


And look here for info on tiling and pva (i will presume super latex would be just as bad?)
http://www.ultimatehandyman.co.uk/tilin ... se_pva.htm
biggerbyfar
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Post by biggerbyfar » Sun Nov 08, 2009 11:51 am

handyman wrote:you are joking .......yes?

On this very thread you are posting on, it states quite clearly several times, that you dont mix pva with paint in any way. (makes it even worse doing this in a bathroom)

And look here for info on tiling and pva (i will presume super latex would be just as bad?)
http://www.ultimatehandyman.co.uk/tilin ... se_pva.htm

Hmmm you're right. The amount of PVA mis-information is mind boggling. This recommendation came from a guy a leyland trade shop. The said the PVA would be for the ceiling only due to condensation - to form a barrier to moisture. But yes I've now seem many other posts stating never to do this, and paint peeling because of it. Like this one - painting-a-bathroom-ceiling-t1358.html

Regarding the 'super-leytex' paint : http://www.leyland-paints.co.uk/datashe ... ion_DS.pdf

...looks like the 'super-leytex' has no relation to PVA. The plaster looks like it was never really painted with a thinned paint to start with, which is where I presume the recommendation to paint with this stuff came from 'suitable for new plaster'.

That said, because I'm tiling three walls, I've now come back to the opinion that I should just used BAL primer and that's it.

For the ceiling I'm now think the same thing, but without the PVA. A durable vinyl matt, rather than vinyl silk as the ceiling isn't perfect.
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Post by pepsta » Tue Dec 15, 2009 5:26 pm

GUYS
ITS TOO EASY
SUPERMAT BY DULUX ITS MADE FOR NEW PLASTER!!!
PVA....NOWAY JOSE
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Have Brush Will Travel
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Post by Have Brush Will Travel » Thu Feb 04, 2010 8:07 pm

handyman wrote:you are joking .......yes?

On this very thread you are posting on, it states quite clearly several times, that you dont mix pva with paint in any way. (makes it even worse doing this in a bathroom)


And look here for info on tiling and pva (i will presume super latex would be just as bad?)
http://www.ultimatehandyman.co.uk/tilin ... se_pva.htm
No harm in mixing it with vinyl silk...I have done it loads of times on bear Artex that is nicotine stained (after a wuick once using with watered down bleach in the garden sprayer)...PVA will hold back stains in many cases..and theres no other option...well apart from Zinseer or oher specialist blocking paints...that stink to high heaven.

Oil baed undercoat works sometimes...not everytime.

That said...thats the only time PVA and paint share the same sentence in my book...and certainly not, never, as a pre mist coat..waste of time money and it will probably lead to the following paint flaking at some point.
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Post by PerfectFinish » Fri Feb 05, 2010 10:50 pm

I have always used the following system with new plaster

1 coat of Albany Supercover
De-nib
Fill / skim over any uneven areas
2 coats of the chosen emulsion

Albany Supercover is much like Dulux Supermatt, except cheaper. I pay around £30 for 12l. It will cover a newly plastered ceiling in 2 coats. Its also available in Magnolia, so ideal for new builds (where magnolia is the norm) as it only 2 coats are nessessary.

I sound like an albany salesman! lol
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Post by handyman » Sat Feb 06, 2010 9:13 am

do you water down the first coat?
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Haha

Post by simmo821 » Sat Feb 06, 2010 11:07 am

Haha and the DIYers still dnt get it once they have been told by a pro! I thought the saying goes if u can p*ss you can paint! Ovbiously not!!
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Post by Have Brush Will Travel » Sat Feb 06, 2010 12:16 pm

PerfectFinish wrote:I have always used the following system with new plaster

1 coat of Albany Supercover
De-nib
Fill / skim over any uneven areas
2 coats of the chosen emulsion

Albany Supercover is much like Dulux Supermatt, except cheaper. I pay around £30 for 12l. It will cover a newly plastered ceiling in 2 coats. Its also available in Magnolia, so ideal for new builds (where magnolia is the norm) as it only 2 coats are nessessary.

I sound like an albany salesman! lol
Sounds about right to me.. :thumbright:
I intend to live forever......So far, so good
gixer750ws
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Post by gixer750ws » Sun Feb 21, 2010 8:15 pm

no just don't do it!!! :wink:
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