Mould in room and condensation in loft!

[DoIHaveToBeAnAdult]

I have mould along the outside wall of my bedroom. It's where the wall meets the ceiling.

I'm airing the room well and cleaning it off and it keeps coming back.

I looked up in the loft and there is loads of condensation. Could that be causing the problem?

I'd be grateful for any advice from anyone who has any knowledge. Thanks!

If the condensation is running down and then pooling on the loft floor, it could be.

Get some loft vents. We panicked when we had a new roof done and then realised there was condensation all over the felt. These sort of loft vents sorted it.
https://www.amazon.co.uk/felt-lap-vents/s?k=felt+lap+vents

The first thing you need to do is buy some dehumidifiers. You can get a pack of 3 from poundland, even elsewhere they're cheap. You could also get a mini plug-in dehumidifier for your bedroom - about £30. Check that your loft has good ventilation - their should be air-bricks at either end and these shouldn't be obscured by loft crap.

Are you drying clothes indoors?
Can you see if your guttering is blocked/dripping down the wall?

Condensation in the loft means it isn't ventilated properly and yes, that condensation could be setting in one location and causing the damp in the bedroom.

What ventilation does the loft space have?
If none, you can have replacement vented tiles fitted for very little cost (a builder or roofer will do it) or if you have an external wall in the loft, you can fit air bricks.

Thank you everyone.

How would I find a reputable roofer? I've done a Google and all I get is websites that ask me to fill in details for quotes.

What is this MN obsession with dehumidifiers?

The OP needs to find the source of the moisture and cure it.

I've had a PIV unit installed in the loft and it's got rid of all of our condensation. We are in a Victorian mid terrace.

You need to get a proper electric dehumidifier. It will suck out the damp. Then once it's dry you can see where the source is from.

We've got exactly the same problem, and are using the things AllFun linked to above to try to alleviate the problem.

The reviews are good so that's our first port of call.

I'll add, the source for us is lack of ventilation, no leaks anywhere.

We have very well fitted triple glazing, but no trickle vents.

Plus two bathrooms, two teenage girls who have an aversion to open windows in the bathroom and no extractor fans... All on the north side of our house.

We noticed when we went into the loft last week, when it was very cold and still for a few days. If it's windy it's much less noticeable (like the pre Christmas loft visit).

Soffit vents

That's what you need.

Soffit Vents (Everyting You Need To Know!) Best Type?! (roofcalc.com)

I agree about a dehumidifier, bought one for my bedroom and it has worked wonders.

We had air vents (several) fitted in our roof a couple of years ago, no more condensation in the loft after that.

@Shifty @ShiftySquirrel you need to fit inline extractors in the bathrooms. They are much more effective at extracting moisture than opening a window.

If you have condensation in your left then that needs ventilation. Just whacking on a dehumidifier isn't going to solve the root cause of the problem.

You absolutely shouldn't have condensation in the loft. Pull the insulation away from the eaves so a little air can get in that way and if that doesn't help, get some loft ventilation grilles fitted.