black mould on Windows

[bananacarnival]

Hi, really need some advice on this ongoing problem. Only happening in one room my sons bedroom and he's asthmatic which can't be helping him. The Windows in our 30s semi are single glazed, his room is at the front of the house, and despite airing it for several hours each day, I find the windows are v wet, I mop this up most days but occasionally in the mad rush forget. This results in black mould appearing all over the edges of the windows.

I've had the windows stripped and repainted with v good quality paint. It keeps returning. The curtains are thick heavy and thermal. The room is colder than others hence the condensation so I'm reluctant to put in an air vent. It's already draughty.

I haven't tried a dehumidifier because I once owned one, it was huge and difficult to maintain.

Any suggestions greatly appreciated.

Can you buy mould resistant, or deterrent paint? I'm abroad so my be talking twaddle, but I think I've seen it mentioned somewhere.

Are they metal window frames? 30's Crittal windows were notorious for this.

I can't really advise on ventilation etc, I'm sure you've thought of all the usual things, but I would suggest that you keep washing the frames down using a weak bleach solution, or Flash with bleach spray. Or buy a bottle of fungicidal solution from B&Q. Doing this regularly will help prevents the spores multipying, but only sorting out the condensation/ventilation will stop it all together.

Are they metal window frames? 30's Crittal windows were notorious for this.

I can't really advise on ventilation etc, I'm sure you've thought of all the usual things, but I would suggest that you keep washing the frames down using a weak bleach solution, or Flash with bleach spray. Or buy a bottle of fungicidal solution from B&Q. Doing this regularly will help prevents the spores multipying, but only sorting out the condensation/ventilation will stop it all together.

Also, if you dry wet washing on the radiators then stop!

Thankyou all. No, washing goes on a rack in a ventilated room. I'll try bleach solution.
They're not metal...wooden bay windows.

If there is any way of warming the room up more that would help.
I have found a combination of adequate warmth and ventilation is very helpful.I keep mine open a crack almost all the time and fling them open every so often.
I use bleach solution on my windows but I am in a good routine of wiping up the condensation in the morning.
Also can you make sure his bedroom door is kept open as much as possible to allow free flow and circulation of air with the rest of the house - I find that also helps.
I do use a dehumidifier when a room starts to smell a little more damp than usual (we have damp as well as condensation).

the Lakeland hg mould spray is really good for this I use it on our windows :) also had a dehumidifier in our last place as it was awfully damp, it was rucksack sized from b and q about a 100 and was always really good no problems with it

Get a modern dehumidifier. Ours is absolutely zero maintenance (bar emptying the tank obviously!) and is only about 30cm x 30cm floor space. It's knee height and has casters as well. They're nothing like the old ones with the pipes out of the window nowadays.

Thanks..great suggestions. Im scribbling them down!

I use the dettol spray on ours but we have double glazing, we get mould round all the windows but after using the spray it keeps it away for a few weeks.

This is quite interesting - tea tree oil:

Tea tree cure

Also a toothbrush is useful for getting into window cracks.