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Do I need to Drywall over a wooden tongue and groove ceiling for fire safety

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  • 16-09-2020 10:50pm
    #1
    LocoLogo
    Registered Users Posts: 9 ✭


    Im doing a reno on a 1970s house with tonge and groove ceiling boards in the sitting room. Im dry lining the house next week and wondering if I should sheet over these boards as well to prevent a fire risk?
    Tagged:


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    #2
    Payton
    Registered Users Posts: 1,660 ✭✭✭Payton


    Can you not remove the old T and G ceiling?


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    #3
    Gumbo
    Moderators, Society & Culture Moderators Posts: 38,911 Mod ✭✭✭✭Gumbo


    LocoLogo wrote: »
    Im doing a reno on a 1970s house with tonge and groove ceiling boards in the sitting room. Im dry lining the house next week and wondering if I should sheet over these boards as well to prevent a fire risk?

    What’s the fire risk?
    Spread between separate units?

    You can fire proof from above using different products.


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    #4
    Yellow_Fern
    Registered Users Posts: 2,595 ✭✭✭Yellow_Fern


    The trouble with T and G is is that it can be draughty.


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    #5
    deandean
    Registered Users Posts: 2,231 ✭✭✭deandean


    Is there plasterboard above the T&G boards?


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    #6
    LocoLogo
    Registered Users Posts: 9 ✭LocoLogo


    No its attached straight to the floor joist. There is a bedroom above


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    #7
    LocoLogo
    Registered Users Posts: 9 ✭LocoLogo


    Gumbo wrote: »
    What’s the fire risk?
    Spread between separate units?

    You can fire proof from above using different products.

    I wasnt sure if there is any new regulations that require you to drywall over top?


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    #8
    Gumbo
    Moderators, Society & Culture Moderators Posts: 38,911 Mod ✭✭✭✭Gumbo


    LocoLogo wrote: »
    I wasnt sure if there is any new regulations that require you to drywall over top?

    Your not explaining the set up properly.
    What are you fire stopping?
    It sounds like you are trying to stop fire spread from below to upstairs.
    Is this an apartment complex? Single house?


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    #9
    Metric Tensor
    Registered Users Posts: 3,724 ✭✭✭Metric Tensor


    I think the OP is saying that they have a two storey house and there's a tongue and groove ceiling in the downstairs living room above which there's a bedroom.

    I'm not aware of any rule that says the ceiling "has" to be slabbed in a two storey house* OP - it is different for a three storey house though!


    * There is a recent communiqué by building control authorities regarding open web joists in two storey house ceilings which is somewhat strange in my opinion - and based on their interpretation of that area I wouldn't bet against some weirdness around T and G if they decided to cast their attention in that direction! Another poster on here may correct me!


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    #10
    sydthebeat
    Subscribers Posts: 41,379 ✭✭✭✭sydthebeat


    No way would I live in a bedroom over an untreated t + g board ceiling. Fire risk, while hard to ascertain, is not acceptable


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    #11
    Yellow_Fern
    Registered Users Posts: 2,595 ✭✭✭Yellow_Fern


    sydthebeat wrote: »
    No way would I live in a bedroom over an untreated t + g board ceiling. Fire risk, while hard to ascertain, is not acceptable

    I dont see where you are coming from at all. Are you basing that on data or just prejudice against wood?


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    #12
    bobbyy gee
    Banned (with Prison Access) Posts: 1,306 ✭✭✭bobbyy gee


    fire proof wood
    https://www.hunker.com/13401329/how-to-make-wood-fire-resistant


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    #13
    Calahonda52
    Registered Users Posts: 12,346 ✭✭✭✭Calahonda52


    Yellow_Fern wrote: »
    I dont see where you are coming from at all. Are you basing that on data or just prejudice against wood?

    What do you mean by prejudice in this context?

    “I can’t pay my staff or mortgage with instagram likes”.



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    #14
    listermint
    Registered Users Posts: 33,857 ✭✭✭✭listermint


    Yellow_Fern wrote: »
    I dont see where you are coming from at all. Are you basing that on data or just prejudice against wood?

    Christmas tree fire would eat that timber and the room above it in less than a few minutes. You could be taking 90 seconds depending on conditions.


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    #15
    BryanF
    Moderators, Home & Garden Moderators Posts: 10,140 Mod ✭✭✭✭BryanF


    70’s house : possibly lead paint in the t&g

    Is that prejudice enough?

    Also see part b 2.3


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    #16
    Yellow_Fern
    Registered Users Posts: 2,595 ✭✭✭Yellow_Fern


    BryanF wrote: »
    70’s house : possibly lead paint in the t&g

    Is that prejudice enough?

    Also see part b 2.3

    Lead paint is permitted in some situations. As far I know it is not volatile.


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    #17
    mad m
    Registered Users Posts: 9,002 ✭✭✭mad m


    Honestly quicker to rip down T&G and re-slab. I’d be more worried with what type of fire detection system you are considering. Early detection is key. FDAS Grade D LD2


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    #18
    Yellow_Fern
    Registered Users Posts: 2,595 ✭✭✭Yellow_Fern


    A traditional lath and plaster is more airtight, soundproof and fire safe.


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    #19
    Dobloman
    Registered Users Posts: 47 ✭Dobloman


    Yellow_Fern wrote: »
    A traditional lath and plaster is more airtight, soundproof and fire safe.

    Two layers 12mm fireline plasterboard fixed up to it and either tape and joint it or skim it will give you a good fire rating.


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    #20
    LocoLogo
    Registered Users Posts: 9 ✭LocoLogo


    listermint wrote: »
    Christmas tree fire would eat that timber and the room above it in less than a few minutes. You could be taking 90 seconds depending on conditions.

    Thanks, that is reason enough to drywall over top of it


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