Black mould

[SupraP-Z]

Seems like you have sorted out the problem, youve done the right thing. Ventilation is the key. In the past ive done the similar, bleached the mould, sanded the wall down, primed with anti-damp/mould paint and then final coat over the top - after keeping the area well ventilated ive not seen a problem since.

 

I wouldn't recommend using anti-damp paint because it just forms a membrane and keeps the moisture inside the wall instead of letting it air out.

 

Ive seen a few PIV systems installed and they do make a difference when installed in the right place. Just dont make everything air tight!

[Dnk]

Pretty happy that once i fit the PIV in the loft this will end the problem, i'm also contemplating fitting

a vent into the bathroom as that's the biggest source for the moisture.

[SupraP-Z]

Does the property have double glazing? More often than not, they have little closable vents in the upper frame. These will allow gentle flow of natural air around the room. A lot of houses I've seen actually have air bricks with mesh grills installed, keeps the bugs out and keeps ventilation at a good level. Although in your case, yes definitely ventilate the bathroom especially if its windowless.

 

The PIV should completely sort out the problem, will you be installing it yourself? alternatively in the meantime. Keep a dehumidifer in the room for a few days or so. Then just keep the window open, the door open, and same with a room opposite, to create a small wind tunnel from one room to another

[Dnk]

Non of the windows have trickle vents and theres no air bricks either hence

the problem. i'm looking into fitting some now as well as the PIV and bathroom vent.

 

 

Yes i'll be fitting the PIV, it's very easy to do, the hardest part which isn't that

hard is cutting the hole in the ceiling

 

I've locked two adjacent windows on they're second position so they are very slightly

open and that has stopped all the condensation straight away

[SupraP-Z]

Good stuff Dnk! Did a pukka job of cleaning up that mould too. There was one property that i was doing up, had cement ceilings, the previous builders had done such a bad job...when it rained you'd see water trickle down the walls. The mould in there was unimaginable, had to hack everything out and start from scratch. One of the dirtiest jobs ive ever done for sure.

 

With that combo, i dont see condensation ever settling in that room now lol

[Dnk]

Good stuff Dnk! Did a pukka job of cleaning up that mould too. There was one property that i was doing up, had cement ceilings, the previous builders had done such a bad job...when it rained you'd see water trickle down the walls. The mould in there was unimaginable, had to hack everything out and start from scratch. One of the dirtiest jobs ive ever done for sure.

 

With that combo, i dont see condensation ever settling in that room now lol

 

Thanks mate, you just have to get stuck in and do your research on the best way to

prevent it happening again.