Painting New Plaster

ormus

i do know some pros who use pva first but ive always used a weak emulsion first coat, then emulsion normally. never had a problem with any new plaster work yet.

and do leave the new plaster alone for as long as possible. the longer the better. i would say 2 weeks is a minimum.

home_alone

handyman. wrote: »

thanks gary...........a perfect example of a made up, ill advised post, which is just adds confusion to the subject.

As i say, I will presume the manufactures of the paint know much much more than you when it comes to putting there produce on new plaster

I own a plastering firm and use professional painters this is their advice I would say its a perfect example.

gary

handyman.

but you dont own a paint manufacturing company.............in which case you are saying you know better than them. None say to apply pva first, so can you explain this?

Can you explain the logic of using pva, when its designed to re activate when wet (this is why plasterers use it, as you will know)??

home_alone

handyman. wrote: »

but you dont own a paint manufacturing company.............in which case you are saying you know better than them. None say to apply pva first, so can you explain this?

Can you explain the logic of using pva, when its designed to re activate when wet (this is why plasterers use it, as you will know)??

There is no better evidence than experience and advice given by those you know are skilled, I have used PVA myself wthout the use of a primer paint for many many years and have had no problems, the advice I have offered is what I give to customers, if you wish to go a different route do so after all its just opinion at the end of the day. My last words on the subject apart from there are some brands of PVA that should not be used for any purpose they are useless.
Plasterers use PVA because it seals (although not completely waterproof) and delays water absorption therefore allowing more time, therefore larger surfaces can be plastered (jobs undertaken previously by 2 or more plasterers. Of interest some new paints are now being produced with a PVA base (mainly american). I do not know of a UK paint manufacturer that makes PVA so they will advise you to use one of their very expensive stabilizing solutions which is the reason why people keep asking this question looking for a cheaper option, The real answer is try all methods and discover what you find acceptable and does the job. (really is my last word)

gary???

handyman.

had to email dulux trade, as so many people disagree with me about pva, and this is what they said...................


Thank you for your E-mail

I can categorically confirm we DON'T Recommend using PVA to seal new or
bare plaster.
This is because the PVA will seal any residual moisture on the plaster any
may cause bubbling when it dries.
This is also stated in BS 6150 and our ICI site work instruction.

Hope this helps.

handyman.

also, the paint manufacturers dont "advise you to use one of their very expensive stabilizing solutions ", all they say is to use some watered down paint.

handyman.

now, with this pva advice now being known to be against a british standard, i feel that the site shouldn't allow this information to be published on the site anymore.............just like they wouldn't put dodgy electrical or gas advice on there site

andipandi_2

if you pva the new plaster you will wait ages for paint to dry and the paint will not soak into the new plaster which is what you want,the idea of a watered down coat of paint first is to get the paint to adhere and soak into the plaster,don't rush and paint over watered down coat before its dry other wise the paint might peel off esp when using vinyl silk which is not really suited to new plaster in my opinion

andipandi_2

handyman. wrote: »

exactly nelly............pva for plastering, not for painting

100% correct

andipandi_2

home_alone wrote: »

The best of both worlds is use a cheap emulsion watered down with PVA, from the horses mouth.

gary

not true at all