Blistering Paint

[davefalcon]

Hi all,

Had bathroom ceiling reskimmed apr 1 year ago, was then painted by local guy.

Since then, the area above the shower has been blistering, I've removed one section to show the skim level underneath.

Would appreciate any advice from anyone who has had/or seen this problem before, I've read various different ways to resolve this issue.
Most seem to be to strip as much paint back as possible, seal the skim layer and then repaint.

I've checked the vent fan and it seems fine, although I will be cleaning it out to ensure it's working as well as it should.

Appreciate any relevant advice.

Cheers

Dave

 

[joe-90]

What did he paint it with? Did he do a mist coat?

 

[TheDec]

It is more than probable that the local guy did'nt apply a mistcoat and therefore your paint system has failed to bond with the skim, there is also the possibility that the skim was sealed with pva. What paint do you have on the ceiling.

Dec

 

[davefalcon]

Not entirely sure what he did to be honest as I was working away at the time, that's the only reason I got someone in to do the painting.

I've got a feeling he might have PVAd it, the plaster is quite shiny.

I think he used one of the sheen emulsion paints used for bathrooms/kitchens.

If I remove as much of the loose paint section as possible and sand over, would a mist coat then sit on the plaster coat ok if it had been PVAd?

Thanks for both responses

 

[joe-90]

If it's shiny then it is PVA. Best bet is to get the loose stuff off, abrade it with 120 grit, and then apply a couple of coats of oil-based undercoat. As a top coat I prefer either oil satinwood or oil eggshell, but that's just my personal preference. I've never had any problem using that method and the paint stays on for decades.

 

[davefalcon]

If it's shiny then it is PVA. Best bet is to get the loose stuff off, abrade it with 120 grit, and then apply a couple of coats of oil-based undercoat. As a top coat I prefer either oil satinwood or oil eggshell, but that's just my personal preference. I've never had any problem using that method and the paint stays on for decades.

Have now removed a section above and beyond the shower area, looks like it wasnt pvad after all as only the prev exposed (and slightly damp) section was shiny, all the new atea uncovered today appears to be bare plaster.

Will sand down the edges and undercoat the affected section, then repaint the whole ceiling.

Ive noticed all the plastering where the ceiling meets the walls slightly overlaps, so will probably put some sealant where the tiles on the wall meet the ceiling.

 

[CookEe01]

Had exactly the same problem in a new build flat. Ceiling in the shower room kept flaking off in big chunks.

We stripped the paint off and it looked like the builders had just painted onto the plasterboard (wouldn't put anything past them if their skills in the rest of the flat were anything to go by).

Had the plaster skimmed and lightly sanded. We then put a watered down paint solution on it to 'seal' the plaster. A couple of top coats of bathrooom paint and touch wood, it was fine after this.