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Cavity insulation left exposed to waste pipe

Discussion in 'Building' started by GSC1000, 5 Jun 2019.

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  1. GSC1000

    GSC1000

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    Hi,
    Having an extension built, and the builder has left the bathroom (bath/sink only) waste pipe directly over one of the new walls.
    For the last 10 days the waste water has been pouring into the cavity and the insulation is soaked.
    Builder has told me it will dry out, but the roof is supposed to be going on soon and without the pipe being secured/ moved there will be no time for it to dry!
    Also will the insulation even be effective after being that wet for that long?!
    Single lady with not a clue about this, so any advice much appreciated!!
    TIA
     
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  3. Mobo_14

    Mobo_14

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    Sounds like just pure laziness to me. Shouldn't have been too hard to re direct it even temporarily.

    What type of cavity insulation has been installed?
     
  4. GSC1000

    GSC1000

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    I should know this shouldn’t I?! It’s soft, yellow/beige in colour & cotton woolly in appearance. Sorry that’s not very technical is it?!!

    The builder is now moving the pipe tomorrow... roof due to go on early next week. I’m just concerned the insulation will be less effective even once dried out. Am I right to worry?!!
     
  5. Mobo_14

    Mobo_14

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    Aye by the sounds of it it's mineral wool type. It's designed to be built into a cavity and kept dry so it's gonna soak up all that water going into your cavity. I'd refrain from making it worse if possible duno if that's easier said than done. Don't use the sink and bath unless you've no other option. I'd be having a word with your builder aswel about putting something in place to keep the cavity dry. Make sure it's properly dried out before he continues building or it could transfer damp into your inner course.
     
  6. GSC1000

    GSC1000

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    Thanks Mobo_14. Once it’s dried out will it be ok?!
     
  7. noseall

    noseall

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    Yes. Dritherm is silicon coated to resist water in a lateral direction when positioned in the cavity. However, yours will have taken a pasting but should dry out ok.
     
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  8. Mobo_14

    Mobo_14

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    Aye should dry out given a chance.

    No problem (y)
     
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