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Kitchen flue leaking - roof or condensation

Discussion in 'Roofing and Guttering' started by SamJames, 2 Nov 2016.

  1. SamJames


    26 Feb 2016
    Thanks Received:
    United Kingdom
    I live in a top floor flat and the building has a flat roof. The kitchen hood and bathroom extractor fan flues both go straight up through the roof. Last year around November water started dripping down the outside of both the kitchen hood flue (soaking wooden cabinets) and from where the bathroom extractor comes into the flat. Photos from the roof and of the water damage attached.

    The building management deemed it to be a leak and fixed by applying a "raised fillet upstand around each vent using the Fix-R primer, membrane and liquid." They also changed all vents to double downward facing.

    This appeared to work for a while but it was over Summer so difficult to tell. Now it's November and water has started dripping down again. I notice that there hasn't actually been much rain recently; however, the temperature outside has dropped considerably. Now I'm wondering whether this really is a leak. Could the water be from condensation for example? The flue is all boxed in so I'm not able to see it. I don't even know who to call to fix it, whether is a roof issue or venting issue. Any advice would be greatly appreciated.

    Attached Files:

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  3. vinn


    7 Mar 2016
    Thanks Received:
    Your question is almost impossible to answer on here - you need a site visit to have the roof water tested and the flues expertly examined for condensing moisture etc?
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