Damp issue

[Grant785]

Can anyone advise what might be causing this damp. The property is a 2 storey end terrace, walls are standard red brick with block internal. The damp is on the end wall at the top of the stairs just below a window. To my knowledge it has only appeared today after the persistent rainfall. Unfortunately, I only just noticed it so couldn’t really see the external wall properly in the dark, however it didn’t appear to have any damage.

 

[Si_]

Check the sealant round the window first. An easy fix if that's the problem. When I had similar in the old house a 2mm gap in the sealant let in three bucketfuls of water during a single rainstorm.

 

[Grant785]

Thanks for the feedback, will have to check in the daylight. I also had someone suggest the pointing could be causing it. Hopefully nothing major though.