Painting onto new plaster

[neil.russell11]

Please can you tell me what the ratio is between paint and water when painting onto new plaster. I understand it jusat soaks in so there is no real point in using 'neat' emulsion.

Thank You

[Edzy55]

Neil

I heard it's 50/50. What they call in the trade a mist coat or a pi$$ coat.

Hopefully someone can confirm.

Edzy55

[Steve Walker]

No - only the moisture soaks in, so with neat emulsion you'll end up with a rubbery skin which isn't properly attached to the wall. Personally I seal the wall first with 5:1 PVA, but others prefer 50/50 emulsion & water.

[Christian McArdle]

I've heard too many horror stories about using PVA. I use about 50-50 emulsion, possibly tending to more emulsion. I don't measure it very accurately. I just add in enough water to make it very runny.

Christian.

[Mark]

Between 50-25% water. New plaster will suck the water out of the paint at a very high rate. Also don't paint new plaster too quickly - allow time for it to dry out first.

Mark.

[Christian McArdle]

P.S. For new plaster, use a specialised emulsion, such as Dulux Trade Supermatt, which is specifically designed for new plaster.

Christian.

[Matthew]

Ive used a 50/50 mix for years without any problems on newly plastered ceilings and walls.

PVA is ok if the plaster is flaky and needs stabilising.

Matthew

[PM]

How long to leave a skim before painting?

[Mark]

How long is a piece of string ;-). It depends on many factors such as the thickness of the plaster etc. I would leave it at least two weeks, preferably more. YMMV.

Mark.

[Christian McArdle]

You can do it within a day or so if you use a breathable emulsion like Dulux Trade Supermatt. Otherwise, you may have to wait weeks for a standard vinyl emulsion.

Christian.

[Peter Johnson]

Or Crown Covermatt, Macpherson's Eclipse. Designed to let any residual moisture in the plaster escape.

[JoeJoe]

I've painted around 10 new-plasterred room in the last two years ir so.

I leave the plaster to dry for as long as opssible (2 weeks or so min), and then paint it with B&Q's cheapest emulsion mixed with water and PVA - ration of around (never measured) 5:2:1 Paint:Water:PVA. Once dry I apply the colour of my choise on top.

Never had any problem.

HTH.

[John Anderton]

This has always struck me as somewhat odd. Allow the plaster to dry thoroughly and then wet it with highly diluted paint ! :-)

Cheers,

John

[Sean Mc]

Wait until the plaster is almost white....

On plasterboard about 3-7days, with undercoat and skim about 2-3weeks but this all depends on the weather and temp.

First coat 50/50 DONT USE VINYL Then IMHO 75/25 giving the wall atleast 24 hours to dry at around roo temp from the first coat. Third and final coat again after 24 hour drying what ever you like, bu I would maybe give another coat of 75/25 if your end coat is vinyl.

Its something you cant rush if you want a decent finish

Sea

-- Sean Mc

[John]

Best of all is EarthBorn Claypaint. So breathable it is as if it is not there. Ideal for new plaster.