plaster not bonding

Question

Hi

We had a room skimmed back in August, and have just got round to having it painted. Soon after the painting had been completed we noticed some bubbling on the surface of the wall.

We mentioned this to the painter and his team visited this morning. It seems that the plaster skim has not bonded to the wall and the addition of the paint has caused the plaster to delaminate. The wall is very chalky where the plaster is coming off the wall. It looks like the skim coat has bonded to the paint that was on the wall as opposed to the wall

struggling to decide what needs to be done, do we just get the blown patches filled, the plasterer has suggested that would suffice, or should we, and I hesitate to suggest this, remove the whole skim coat and start again from scratch?

Alan · Accepted Answer

Sounds like a lack of preparation prior to skimming... Scrape back and sandpaper the affected areas, paint with neat SBR and allow to dry overnight then skim and blend in the affected areas. if a blend is not possible/suitable, then do the same for the whole wall.

Garry · Answer

Start again from scratch it obviously wasn’t done right

Ian · Answer

It sounds to me like he has plastered over white wash,s rape off and start again ,the more liquid you add the worse it will get.

Paul · Answer

on bear plaster it needs a coat of whitewash before putting paint on .

Tom · Answer

Hello, everything must be taken down and taken from "0"

Scott · Answer

if it's only a couple of areas try patching first but as a plasterer my self there probably more going to come away so a scrap and re skim will probably be needed

Carlos David · Answer

This sometimes happens because the plasterer must know that when he does plastering on an old wall, it is necessary to put PVA so that the plaster sticks well to the wall and before painting it is necessary for the wall to be very dry to paint it.

Frank · Answer

If the wall is chalky we're it was plastered could of been old dismember on wall which you can't plaster over it will just fall of

Ben · Answer

It seems to me as tho the plasterer hasn't primed the wall sufficiently, possibly plastering over gloss/silk paint, in turn causing the plaster to pull away over time but without seeing I can't be sure

Jon · Answer

In my opinion I would definitely start again. It’s better to get it right,

plaster not bonding

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