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Cold Dormer Room ?

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  • 15-02-2020 5:09pm
    #1
    alongwaytotipp
    Registered Users Posts: 26 ✭


    Hi,
    I moved into my house about three years ago and the dormer room and the room below it are always cold. After some investigation I have found that the air coming in via the sofit board is able to flow between the floor and ceiling of the two rooms. See attached picture for (hopefully it is clear) more details.

    Should the gap between the floor and ceiling be blocked or do I need to allow a flow for ventilation ?


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    #2
    Calahonda52
    Registered Users Posts: 12,193 ✭✭✭✭Calahonda52


    yes, google ventilation baffles

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



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    #3
    bunderoon
    Registered Users Posts: 661 ✭✭✭bunderoon


    alongwaytotipp wrote: »
    Hi,
    I moved into my house about three years ago and the dormer room and the room below it are always cold. After some investigation I have found that the air coming in via the sofit board is able to flow between the floor and ceiling of the two rooms. See attached picture for (hopefully it is clear) more details.

    Should the gap between the floor and ceiling be blocked or do I need to allow a flow for ventilation ?

    The soffit vents should funnel fresh air up through the felt and rafters to prevent rot.
    My understanding is that the insulation above the ground floor ceiling should go out as far as the inside brick as co cover/insulate that ceiling entirely. You should also have the knee walls in the attic and also the attic room ceiling well insulated.


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    #4
    listermint
    Registered Users Posts: 33,615 ✭✭✭✭listermint


    Resolution to this may involve moving the first two or three rows of slates back while you insulate and airtight that gap..then install baffles to run air up through rafter space.


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    #5
    alongwaytotipp
    Registered Users Posts: 26 ✭alongwaytotipp


    Great thanks for the reply all...I know what to do ! ;)


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    #6
    Calahonda52
    Registered Users Posts: 12,193 ✭✭✭✭Calahonda52


    you sketch suggests the floor in the room goes all the way to the eave.
    Is that correct?
    .

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



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    #7
    alongwaytotipp
    Registered Users Posts: 26 ✭alongwaytotipp


    Calahonda52 wrote: »
    you sketch suggests the floor in the room goes all the way to the eave.
    Is that correct?
    .

    Hi Calahonda yes correct. Are you thinking what I'm thinking ...which is to lift the floorboards and block the air flow at the very edge of the wall/roof ?


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