Mould on inside of external wall?

Tinders said:
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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Sorting out the root cause of the damp i.e. The blocked gutter is best thing to do to preventing it from happening again.
 
@Tinders i just added the climashield stuff here as I live on south coast and have cavity walls fhat have been filled and suspect there may be some cold bridging, with houses down here not being suitable to cavitys being filled due to the south westerly winds forcing moisture into the brick during the winter.

My front and side wall are quite open to the elements, only applied this week but it seems to work with the water streaming right off the walls. Hopefully will help in winter as dry walls should be warmer. Not cheap but will report back, every little helps and with brickwork that's 55 years old it needs some assistance.
 
@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.
 
Tinders said:
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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The gutters will 100% be the problem.

Fix the gutters properly, leave everything else and it will probably not come back.

Air bricks are for ventilating below a suspended ground floor E.g. not for living areas. Unless I’ve misunderstood, isn’t this a first floor?
 
Cold walls and condensation, had this in all older houses I've lived in, generally in corners or behind furniture, hardwood backed furniture being the worst as it would absorb the condensation and grow mould.

Do you get lots of condensation on your windows as well?

Best results I've seen are from fitting are positive air system similar to https://www.i-sells.co.uk/nuaire-dr...ontrol-positive-input-ventilation-unit?gclid=
 
Tinders said:
@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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Yeah looked at the various products and did a chunk of research and it gave the same results in tests and as you say so much cheaper. Yeah easy, just roller for me with brush to get to the bits it couldn't squeeze in.

Luckily ground floor only required but brush on and you can see where you've painted, long as you've got a roller extender be fine for that. Just getting enough into the mortar was the hardest part, got to get good pressure for that. Probably bought a little too much. Applied it quite thickly and still got 2 and a bit tubs of the 4 I got left with only 1 wall to go. Will be using the rest on my garage.
 
Tinders said:
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.
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Having windows open especially in the winter is asking for mould and damp to occur. In the summer it's fine but when the temp are drastic between the two areas, it causes damp and mould
 
Tinders said:
Surely its more important to have the windows open in winter, by all accounts its easier to heat 'dry air' even if its cold than to heat 'wet' air.
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That's right about the dry air being easier to heat.

How well that works by having windows open I don't know but the Drimaster builds up a pressure to try and force out moisture laden air.
 
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