Need to find a way to stop condensation on my bedroom window . It's causing black mold on window ledge walls

[DJMK4]

Hi all.

I know how condensation occurs. And how it can cause black mold on surrounding surfaces..

I have abit of an issue which only seems present in my bedroom .I don't dry clothes in here. But the condensation mainly occurs overnight

I wake up in the morning and the inside of my window is covered in condensation , so I have to wipe it down open window slightly

It's got the point where black mold had developed on the window ledge ceiling bit. I will use white viniger and maybe abit of bleach to clear it down. However I need to do abit of plastering or filling around the window ledge soon and paint it with Dulux Matt paint again.

I want to do this but before I do I want to inspect the outside and maybe use a cartridge gun to reseal etc .

Before I look at maybe plastering or filling and painting. How do I cure this for good ? I don't want black mold to keep coming back

Thanks all

 

[DJMK4]

Nope it's just me. It happens a lot in the winter.

It doesn't happen in any other of my rooms..

Is there nothing (product or method) I could do to stop it ? I don't want to do some plastering., Painting etc if it's just going to keep coming back

I need to at some point replace this window. It leaks some draft in and there is plenty of road noise that leaks through it.

Is there any mold prevention product I can use before or after the plastering or repainting to help prevent it forming ?

 

[DJMK4]

Ok thanks all. I'll try some of those window pots for and packs first. Dehumidifiers are noisy but I'll try see what I can do

I'll try do a wipedown with just white viniger fist to get rid of it. I'll also ensure the window is wiped down every morning and I open the window when I wake up.

I'll go ahead as planned to do a plaster round the window and repaint

Most people in this street have been replacing the windows on their property with upgraded ones. So I can't see this being an issue in the long run

 

[DJMK4]

Ok I'll try trickle open too.. noise from local roads is the annoying thing for me

Iv been trying to work out If you can detach the trickle vents to clean. They have some screw caps on the inside of the window on the vents but i can't seem to get caps off or review any screws on the vents to unscrew and clean them.

I did try with one window and trying to get the caps off to reveal any screws almost broke the vents..

Not really a great product to find a way to get them off to clean them

 

[DJMK4]

I was thinking this.

Is it a cavity wall? If so water could be getting in the cavity from above due to a leaking roof, perished membrane, slipped tiles. As well if it's solid wall it could be that your gutters are broken and causing penetrating damp above your window. Could also be a leaking pipe in the loft if you have any pipework up there? Could be lots of causes.

If the primary issue was the condensation on windows from water vapour from breathing, I wouldn't expect mould on the roof of the window alcove to be the issue, usually at the bottom of the sides. To me it indicates water is getting in from above, which to me could be an issue I've just mentioned.

I will double check .there is a bathroom that would extracting through the loft then out the vent so I will check the extraction pipe and also replace it as it will do with a refresh probably. Although as it's only me it doenst get used much and I don't notice the condensation and mould on my bedroom window when I'm taking a shower. The extractor is always on.

. I will also redo the sealant on the outside of the house windows and any pvc ledges

When I mean window ledge ceiling I guess yes .as the window has its own surround or window reveal as they call it

I need to do a thin skim plaster around the window reveal inside , do I have to do anything before doing this as a protector ? Or is it just PVA and mix a small batch of plaster up and do a thin skim layer ?.. if I'm not plastering the rest of the room can use anglebead for the reveal edges and plaster the reveal and around the corner and blend it in to the inside walls which I'm not going to plaster.

What do people use on the edges between the inside wall and window ? Interior sealer ? Caulk or is there a plastic trimming that's supposed to separate the window frame and your wall?.

 

[DJMK4]

@DJMK4 Did you get anywhere with this? Have you left the windows open a crack overnight, and did it reduce the need to wipe them down in the morning?

I have not left them open overnight no. However I have left them open a bit before going to bed then shutting them.

It's a little reduced in the morning but not hugely

All depends on what it's like outside or how cold.. it's been quite mild and warm today for instance and it hasn't been as bad

Ill try the trickle vent but I am quite a light sleeper atm and find it hard to sleep .

Also i about 500meters from a dual carrage way and about 700-800meters from a motorway junction. So around 7pm until about 11pm I can still hear the odd car. Also on a helicopter flight path which goes to and from a hospital about 5 miles away