Why is my wall wet?

housebuyer143

Okay so I woke up this morning and noticed these wet patches on my wall. It hasn't rained for 3 days and it wasn't there yesterday so I'm a bit confused as to what it is. Today is the first day of frost. 
The ceiling isn't wet, Only the wall and there are no gutters or anything above that. You'll see a picture of the roof here. The bit that's wet is directly above the cream concrete window thing.
I had the concrete in the valley replaced 3 years ago so that shouldn't be an issue. 

I've never had this issue before and the walls are solid brick/block.

i can't really take a good look in the loft because it's not boarded.

Any suggestions on what this could be?

 

knightstyle

Probably condensation, was there any water on the windows as well?

housebuyer143

knightstyle said:

Probably condensation, was there any water on the windows as well?

Yes, quite a bit this morning. I did wonder that but it's never happened before so it did concern me. I have put the heating back on and drawn a line around it to see if it gets bigger and hopefully it goes away 🤞🤞 thank you

housebuyer143

It was condensation!! A bit of heat and it's gone 😊 phew!!

stuart45

How old is the house?

housebuyer143

stuart45 said:

How old is the house?

22 years old.

stuart45

The wall should be reasonably well insulated then. You might be getting a bit of condensation forming above the ceiling. That area will e colder because of the insulation in the ceiling joists.

WIAWSNB

I suspect Stuart is on to something. The damp patch on the room wall near the ceiling looks too well-defined to be direct-forming condensation, so I suspect it's actual 'water'. And the obvious source would be from condensation forming in the loft above against that cold wall. 

So, it likely is condensation, but not formed from within the room, but comes from the loft above. 

Are these rafters mouldy? 

The loft insulation along that gable wall is ok to have tucked up tight, but what about along the side eaves - has a gap been left to allow the loft to be ventilated? It should be draughty up there on a breezy day - is it?

Any chance of some similarly clear pics on the eaves sides? 

housebuyer143

WIAWSNB said:

I suspect Stuart is on to something. The damp patch on the room wall near the ceiling looks too well-defined to be direct-forming condensation, so I suspect it's actual 'water'. And the obvious source would be from condensation forming in the loft above against that cold wall. 

So, it likely is condensation, but not formed from within the room, but comes from the loft above. 

Are these rafters mouldy? 

The loft insulation along that gable wall is ok to have tucked up tight, but what about along the side eaves - has a gap been left to allow the loft to be ventilated? It should be draughty up there on a breezy day - is it?

Any chance of some similarly clear pics on the eaves sides? 

I'll take some more pictures later but the roof has built in vents and you can see light and the loft insulation does not cover that, as in there is a gap next to the eaves on both sides. Let me know your thoughts when I post the photos this afternoon. 

In the ensuite next to this room, I do find I'm getting a line of mould on the ceiling and was wondering if it maybe wasn't insulated enough or too much? 

I don't think the rafters are mouldy, just that one there in the photo from the leak in the valley we had. 

housebuyer143

@WIAWSNB

Here are some more photos. Hard to photograph really but I tried my best. The light you see isn't a hole to the outside, it has hard plastic covering it and air comes in through it. 

This is the mould I am getting in the bathroom. 

WIAWSNB

The eaves in the loft look to be well ventilated.
The first gable wall you say is wet - how do you know?