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4 inch hole under JOIST

Discussion in 'Building' started by mrbg07546, 11 Jul 2020.

  1. mrbg07546

    mrbg07546

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    Hi.

    I have a house where it is terraced and has a alley way. (Where I have a room above it)

    I want to put a kitchen extracter fan vented outside. However I realised if I cut hole it may cause the JOIST to drop. Is there anyway round this?
     
    Last edited by a moderator: 20 Jul 2020
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  3. cdbe

    cdbe

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    There are normally ways to do this, for example you could trim the joist:
    15945022257757047220053872343670.jpg

    But it's not really clear what you want to do.
     
  4. big-all

    big-all

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    extraction will be within the room so below the joists ??
     
  5. mrbg07546

    mrbg07546

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    Picture attached
     

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  6. 23vc

    23vc

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    Have a boxed out section above the hood chimney to allow you to vent it further across.
    Or use a non extracting hood and put an extractor fan in somewhere else in the room
     
  7. cdbe

    cdbe

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    Moved it over or trim.
     
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  9. mrbg07546

    mrbg07546

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    Ok so move it over a tad to put it between JOISTS?
     
    Last edited by a moderator: 20 Jul 2020
  10. 23vc

    23vc

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    Put the big hole between the two JOISTS, yeah
     
    Last edited by a moderator: 20 Jul 2020
  11. mrbg07546

    mrbg07546

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    It might be lower then the yellow mark. If it’s low enough could I put it below the JOIST? For example 1 brick course? Or is that a bit risky?
     
    Last edited by a moderator: 20 Jul 2020
  12. 23vc

    23vc

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    Risky to put it below the JOIST, yeah. A few courses down and it may be ok, but that’s probably too low for your extractor hood
     
    Last edited by a moderator: 20 Jul 2020
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  13. mrbg07546

    mrbg07546

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    I could put a helibar in I was thinking. Or some temp support and a very solid duct! But all a bit overkill so I will just drill to the right hand side a bit
     
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  14. DIYnot Local

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