Morning All, I'm having a recurring issue with brown staining appearing to come from behind my fascia boards. Back story is that this has only started happening since ive had my house rendered. The new felt flat roof was renewed in June last year and the rendering was completed at the end of October. I've attached a couple of pictures to assist. It appears that the staining is coming from inside the render and appearing above the bathroom window, I dont know what to do now, any advice would be appreciated. I've had the roofers back a uple of times to see if there is anything obvious. Has anyone ever seen this before? Any help / advice would be welcomed.