Painting room that’s had mould issues

[doctorboo]

We’ve been in our current rental for 6ish months. Winter has highlighted that the box room (front corner of house) is very prone to condensation mould.
The airbricks work, I air the rooms each morning, wipe down the windows and keep the bedroom doors open. It’s unfortunately a very cold room. It’s only slept in from 8-6 but it’s obviously enough!

A couple of weeks ago I:

• sugar soaped the walls and ceiling
• HG mould spray practically all over
• Applied a tin of white anti mould + stain block (which I’d added some extra anti mould solution to) to the two external walls.

So far no mould has shown up and I’m planning on painting the whole room with low sheen bathroom paint - will be adding more anti mould solution to it - usual gloss on the skirting board.

Is there anything else I could do? I’ll get a plug in mini dehumidifier but need to wait for February pay day.

Are you minimising moisture going into the air in the rest of the house? Always using lids on pans in the kitchen, using extractors, window open/door shut for the bathroom for as long as possible after showers, not drying washing in the house and so on?

Yes we’re pretty good at those things @CMOTDibbler.
I’m a broken record about keeping the kitchen door closed and the window open when cooking rubbish extractor fan and opening both windows when showering and door closed when not using it.

There’s currently one of us home during the day so as far as I’m aware the bathroom is closed and windows open for at least 1.5hours after the last shower.

We have asthma & allergy sufferers so for drying clothes I have a tumble dryer and dri buddy in the garage, the only damp things we have indoors day to day are the towels which stay in the closed bathroom. The time on the rad rads in the morning dries them.

The box room definitely had issues before we moved in as I noticed when we moved in that the walls had patches in a colour that didn’t match the original mushroom shade. It looks like they’d put on some blocker on the worst parts. I assumed that it was because there’d been a big wardrobe against the external wall with very little air flow around it.

Thats good - in a previous house we had one room that had three external walls and so was very cold and got mouldy due to condensation. But it was when we dealt with the moisture in the rest of the house by using a dehumidifier that the mould completely stopped.