Roofing

What could be causing these damp patches around my new Velux?

Anonymous user 16/03/2024 - 2.33 PM

We have had significant rain over the last 24h and a damp patch has now appeared around our new (c 2-3 month old) Velux window located in our loft. Sods law that this has happened after we have had it plastered in and primed it (once the plaster was dry) ready for painting. The damp runs full width of the top of the window but is worse on the right hand side (from the inside) where it also appears intermittently parallel with the frame and at the bottom corner of the window. We have left a voicemail for the roofer who installed it (he is a Velux certified installer) but in the meantime I would appreciate any advice on what could be causing it, how we can mitigate damage and what work is likely to be required to stop the leak/sort the plaster. I appreciate it may be hard to diagnose the issue from photos and that the water could be travelling to the area from elsewhere on the roof. We actually just bought a condenser dehumidifier today to deal with the aftermath of another leak on the other side of the roof so no doubt this will come in handy. [External view of top right corner](https://imgur.com/Ul6JxEv.jpg) [External view of top middle](https://imgur.com/Mqm6kKF.jpg) [External view of top left corner](https://imgur.com/RLEVlz9.jpg) [External view - in better weather!] (https://imgur.com/HnaA3P0.jpg) [Internal view](https://imgur.com/dJIwvix.jpg) [Internal pre-plaster](https://imgur.com/YjxEDnL.jpg)