plaster dabs showing through

[ruddez]

drylined and skimmed two interior walls on a kitchen extension going over the existing plaster and painted wall now whenever its damp outside the plaster dabs show through like damp spots there is a cavity wall and there is no damp or leaks will it clear up as i want to paint the room it was skimmed 2 weeks ago and fully dried out except for the dabs showing through any advice please

 

[flynnyman]

Cavity wall insulation, it sounds like the wall is getting cold

 

[whitebeam]

Could be brickies muck sitting on wall ties which is touching both walls is transfering moisture from the exterior wall to the interior.....

 

[carlos]

Could be the walls got piss wet when the extension was being built, it may dry out given more time.

 

[DannyMac]

Yeah, leave it couple more weeks. What was the existing wall painted with?

 

[carlos]

Your other option is to knock your dry lining off and polythene and batten the wall out re-board and skim.

 

[deplastering]

I prefer to battern Walls then screw boards on with drywall screws