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Garage Flat Cold Roof questions

Discussion in 'Roofing and Guttering' started by Rick888, 2 Aug 2020.

  1. Rick888

    Rick888

    Joined:
    11 Nov 2016
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    Country:
    United Kingdom
    hi

    we have a double detatched garage measuring 6m x5m, i have just replacedthe roof for EPDM rubber with new fascias.

    im looking to board the ceiling in plasterboard and stud the walls, i have been reading that i need vents in the cold side for airflow? is this needed in the walls also if i was to put insulation in and leave a +50mm air gap

    there is currently no heating in there and i would only run a 3kw space heater in there for a small space of time on the very odd occasion.

    the roof does not overhang the walls so no way to vent from underneath it would have to be the side

    also if on the plastic vapour barrier how do I seal it when I fit downlights

    what are everyones ideas on this

    thanks
     
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  3. Rick888

    Rick888

    Joined:
    11 Nov 2016
    Messages:
    39
    Thanks Received:
    0
    Country:
    United Kingdom
    I've searched and had many different views on what to do.

    Some say its on to not vent as its a garage and will be unheated so no need

    Then I've read to use solid insulation pushed up to the underside of the roof , i couldnt fill the whole void as they are 10 " joists. ,

    Some say to use vapour barrier and others say not.

    Could I just overboard it and not put any insulation in? Ideally I'd like to insulate but don't want to use mushrooms or vents in the side of the fascia

    What about the walls regarding insulation

    Thanks
     
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