Damp Patch on Wall

[c21z16]

I have a wet patch above the window frame on the ground floor. Firstly, I know that the wall needs striping back, protective seal adding and repainting, I plan to do this in the summer once it's dried out. I have tried filling in a crack above the window (circled) in the meantime but the patch continues to spread so unsure exactly where the water is getting in - There is a crack near the gutters circled where water may be getting through but can't confirm. - Any suggestions?

Secondly, the wall looks soaking wet whenever it rains. I've had a look at gutters from the angles in the photos but can't spot anything obviously wrong. What could be causing this or is it normal?

1890's stone terrace house.

Thanks

 

[c21z16]

Bumping for a response.

The patch has spread slightly the last few days after having stayed the same for around 3 weeks.

 

[Wayners]

Cement render? trapping moisture. Wall needs to breath and air.
You need to get specific advice

 

[c21z16]

I’ve lived here for 2 years and it’s been fine until now. Yes will likely need to.

Just wanted to know if gutters can be damaged without it being obvious I.e I can’t see water running down the wall when it rains.

 

[c21z16]

since learned that the wall should not be painted as it’s trapping moisture. Been using a scraper to remove by hand but it’s a slow process and some parts are difficult/impossible to remove.

Any suggestions to speed up the process?