Diy Query

[AR49]

Any suggestions why paint applied to interior walls of a kitchen extension last year is now "bubbling up" in some areas?

[Buenchico]

This might be relevant:
https://www.bobvila.com/articles/bubbling-paint/

[theshedman]

Hi, is there any damp in the walls? If not was the paint put onto new plaster, walls that haven't been painted before? If it is the latter it could well be that the first coat of paint was put on too thickly as this often causes this type of problem. If you remove the bubbling parts and it looks dry then you could clean the area then put on 2 mist coats of paint which is emulsion that has water put in it even up to 50- 50. These first coats will give the finish emulsion something to adhere to. Once the mist coats have dried then give 1 or 2 finish coats. Sometimes if the first coat has been put on too thickly the whole lot will peel off.

[The Builder]

Everything that the guys above have said.

Plaster no dried out enough (very common)
First coat of paint not diluted enough, or even at all (common DIY fault)

Also, Shedman will have come across this... plasterers over-trowelling the finish.
Known as a "bulls***t" finish. People are easily impressed by a shiny, alabaster sheen to new plaster. It's a decorator's nightmare ;o)

[theshedman]

Yes builder but it's fun watching a decorator trying to put paint on though as long as it's not us. I have known plasterers to do this on purpose just to wind someone up.