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Bathroom extractor fan through timber framed wall

Discussion in 'General DIY' started by Raj1976, 19 May 2021.

  1. Raj1976

    Raj1976

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    Hello! I was wondering if anyone had any advice or experience regarding putting a bathroom extractor fan in a timber framed house please (also considering one for the kitchen as well). I understand you are not supposed to put things through the walls (vapour barrier etc), does anyone have any suggestions / recommendations / experiences? I believe one option (for the bathroom) would be to vent through the roof via a vent tile but I have read stories that this set up isn’t always successful due to condensation running back down the vent pipe work. Ideally I would prefer going through the wall but unsure about whether that causes issues with breaching vapour barrier and cavity. Won’t be doing the job myself but want to know what best practice is before I find someone to do the job. Thank you in advance
     
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  3. jj4091

    jj4091

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    Never worked on a timber framed house so cannot really advise about how it should be done, but I would have thought that as well as considering damp penetration issues you would also have to consider fire & smoke transfer ( I think there are specific building regs covering this) So ask your installer how he/she are going to perform the task, or consult a building inspector type person for advice.
     
  4. Raj1976

    Raj1976

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    Thanks - good points!!
     
  5. foxhole

    foxhole

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    Venting through the roof is fine as long as the fan is up to the job and powerful, it will prevent any condensation forming by shifting the moisture quickly , ducting should be as short as possible.
     
  6. Raj1976

    Raj1976

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    Thanks for that - I am starting to think through the roof may be the best option all round. I'll noted to make sure the fan is powerful and ducting is short. Thank you!
     
  7. freddiemercurystwin

    freddiemercurystwin

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  8. Raj1976

    Raj1976

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    Thank you for that, looks like it would certainly mitigate against the condensation running back down. Going to be a bigger / more complex job than I expected!!! Thank you!
     
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