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Vent.. what is the function of this?

Discussion in 'General DIY' started by Searcher2, 10 Sep 2020.

  1. Searcher2

    Searcher2

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    Location:
    Lancashire
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    I have an air vent to a basement and after heavy rain sometimes water appears from around the vent in the basement. On the outside above the main vent, in the brickwork, are 2 plastic inserts as per the photo attached. I think either water is being blown down the main vent or maybe water ingress is occuring around the plastic inserts... Before I seal around them can anyone tell me why they are present? Thanks
     

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  2. foxhole

    foxhole

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    Cavity vent to prevent damp.
     
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  4. Searcher2

    Searcher2

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    Thanks. So water could be going down the side of these and dropping on the vent under it and running down into the basement.
     
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  5. foxhole

    foxhole

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    More likely to just be getting in around or thru the vent .
     
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