Painted New Plaster

[col72]

We just painted our plastered walls there was done about 4 weeks ago we painted them last week with dulux endurance paint in place it's just flaking and rubbing off any ideas

[Everhelpful]

I could be wrong, but I think newly plastered walls need 6 months to properly dry out.

[Zacs-Master]

I think by using a high spec product you've probably trapped any remaining moisture in the plaster inside it resulting in there being no natural way for the plaster to dry.

[SlackAlice]

After they were dry did you seal the plaster before applying the paint?

You needed to either have used an emulsion based paint thinned out with water or PVA solution of about 5 to 1.

[The Builder]

Probably too soon to be using something like Endurance, col. It's a hard-wearing, washable paint. The usual "trade" method on new plaster is to use a non-vinyl "Contract" or "Trade" emulsion. The sort of thing you see in builders' merchants in those big 10 or 20 litre tubs.

Plasterboard "studwork" walls might possibly take a vinyl after a few weeks because a hollow stud wall dries out a lot quicker.

Solid masonry walls will take a lot longer, especially if they have been backing coats as well as the final skim coat.

The drying process mustn't be held back by coats of non-breathable vinyl.

Assuming your walls had fully dried out, I guess your problem is with your first coat. This should be well diluted. Even more than the 10% water that they often specify on the tin. 20-30% water is better. Simple rule of thumb ......... if you CAN'T see through it, then it's probably too thick.

With walls not fully dried, and paint straight from the tin, it'll just sit on the surface and eventually peel away easily.

[col72]

No we just painted straight on to the new plaster it was dry what can I do now paint sealer on the bad bits

[theshedman]

It sounds as if the emulsion went on too thickly so if I were you I would follow the last 2 paragraphs of the Builder's post. Good chance you will be able to scrape all the paint off easily as it doesn't sound like it has adhered properly to the walls.