Dealing with after effects of condensation on wall

[gsr121]

I have a property which has had a small condensation issue, please see picture.

Just wondering what is the best way to deal with this prior to repainting the wall, so that (a) mould doesn't reoccur (*), and (b) staining doesn't come through . Someone mentioned some kind of PVA paste before painting over it.

(* appreciate that living habits will also need to change to prevent reoccurrence.)

The wall is dry as property has been empty for a while.

Thanks
G.

[gsr121]

There was a wardrobe. Property was rented out and had two people occupying the bedroom.

Double glazed, no trickle vents, but had the ability to lock windows partially open for ventiliatiom. However, I suspect they poorly ventilated it.

G.

[gsr121]

Thanks, I'll get my hands on some of that.

Do I need to do the whole wall with the primer, as will you be able to see a different paint tone for the treated area underneath the top coats I put on afterwards?

[gsr121]

Thanks for the advice. Have got some bullseye 123 from Screwfix. Will give the affected area a good clean first, probably with specialist mould killing cleaning product, then let dry overnight.

Wall is magnolia so I'll see if there is some perma paint close to that colour.

Should I do prime the whole wall with the bullseye, it just affected area and immediate surrounding area?

Thanks
G.

[gsr121]

Just some feedback on this and to say thanks for the advice.

I used the bullseye 123 and it has done the job perfectly.

G.