Brown Staining From to Render From Fascia / Flat Roof

Discussion in 'Builders' Talk' started by Selb81, Jan 11, 2021.

  1. Selb81

    Selb81 New Member

    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.

    WhatsApp Image 2021-01-11 at 09.24.01.jpeg WhatsApp Image 2021-01-11 at 09.23.33.jpeg WhatsApp Image 2021-01-11 at 09.23.32 (1).jpeg WhatsApp Image 2021-01-11 at 09.23.32.jpeg
  2. Astramax

    Astramax Super Member

    What room is on the other side of the vent, has rust been ruled out.
  3. Selb81

    Selb81 New Member

    It's the bathroom. The staining seems to start from the underside of the fascia. It could well be rusty water but would mean water is getting in somewhere.
  4. Astramax

    Astramax Super Member

    Does the vent have a metal sleeve that's corroded, can you go into the loft space and take a good look at that area.
  5. Selb81

    Selb81 New Member

    The vent does have a metal sleeve, I've just taken the vent off from inside the bathroom and there is sign of corrosion (see below image). Would the rust 'track' like this though, both up and down the wall? It also comes through the render very wet (hence the drips).

    Its a flat roof so there is no loft space above the area.

    WhatsApp Image 2021-01-11 at 11.02.06.jpeg
    Last edited: Jan 11, 2021

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