Mould on inside of external wall?

Tinders

Tinders

Tinders

Soldato
Joined
1 Jul 2003
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There's a voice that keeps on calling me.
Hi Guys,

Can any one give me some advise on dealing with light mould on the inside of external wall. Its an old 3 story victorian property and its in a 1st floor bedroom. ive had a look on the outside and i cant see where water could be getting in, so im thinking its an air flow issue, the top corner is bad, which happens to be where my desk and PC are.

I try and keep the windows open as much as possible, but im seeing spots all over the wall, ive wiped the mould off with some HG cleaner, but it reappears after a few months, what would be the best way to tackle this? in a bid to save energy i dont have the heating on much in the room, so could that be a cause? im thinking about putting some battens on and putting some thick insulation on the external walls, would this help or make things worse? i think theres an airbrick, but its plastered over on the inside iirc.

Any advise appreciated.
 
From an initial glance the outer bricks dont look too bad, but thats looking from the ground floor. I can see one or 2 bricks where the face has 'crumbled'. they are solid otherwise, and are good 3-4 ft lower than the corner where the worst mould is.

Its on the 1st floor of a 3 story building, so unlikely to be roof related? The gutters were only cleaned last year after being filled up with a decades worth of crud. but i do remember water used to over flow and run down the wall. Its a house i have inherited so im slowly finding lots of things to fix.

Could/should I put some brick sealant on the outside?
 
Here some pics before i wiped it over, im basically here most of the day, would insulating this wall help? i was thinking of using battens to create an airgap and then use some 25mm cellotex or similar or i can get an air brick put in, just realised there isnt an airbrick anywhere in this room.:(

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I peeled some paper back in the top corner today. Thankfully no spots behind there, it did clean off really easily with some HG foam mould cleaner.

Im thinking if its worth getting a airbrick put into the room, maybe even 2, near the corner of the room, its either that or run a dehumidifier once a day, need to look into the efficiency of them, as my bills are already sky high.
 
Just an update. Ive been doing a fair bit in the house this summer and finally got round to tackling this room. After stripping the paper, most of the wall behind was ok, but there was some bit of small mould on the plaster. One thing i noticed was the rubbish state of the guttering, as it was hugely blocked, the water was running down the wall from the 2nd to the 1st floor. So im guessing thats part of the problem. Its a north facing wall, so it gets the worst of the weather

Ive also come across some cream made by Stormdry its £120 for 5l, but it seems to help with moisture ingress on solid brick construction, whilst still allowing the wall to breath, might even add 2 air bricks in the room, belt and braces and all that :p
 
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@gingergundog ive been looking at the drimaster products, mines a 3 storey house so I can’t get a version with a heater and I’m concerned with the cold draught in the winter. It’s something I’ll invest in next year depending upon how this years ‘mods’ go :p

@SoliD ill look at the climashield products, looks quite a bit cheaper than Stormdry. Need to get it done in the next few weeks before it starts to get colder. Was it easy to apply? I’ve got the bottom half of the top floor to do, I’m hoping it’s easy to apply with a roller on a long pole.
 
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