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Insulation on roof of metal shed - ventilation issue?

  • 06-11-2019 2:12pm
    #1
    s7ryf3925pivug
    Closed Accounts Posts: 4,007 ✭✭✭


    I have a corrugated metal shed which has some mould growth in it. I have no idea if there is a damp-proof membrane in the floor. It has a gable roof.

    The ceiling has plastic wrap and foil style insulation installed. I noticed that the sheets are fastened tightly to the top of the shed walls, so the gap that would otherwise be where the corrugated metal is raised is blocked.

    I've just started cutting up some plastic tubing and pushing it into the gaps to increase ventilation. Does this make sense or am I missing something?

    I've added an image as I'm not sure how clear I'm being.


Comments

  • #2
    fiacha
    Registered Users, Registered Users 2 Posts: 794 ✭✭✭fiacha


    Like you said there may be a larger issue causing damp in the shed, but having air circulation is a must.

    If you don't want to open up all the eaves, you could install some vents in the walls at either end of the shed. That will allow air to circulate and will be easier to keep rain from blowing in etc.


  • #3
    s7ryf3925pivug
    Closed Accounts Posts: 4,007 ✭✭✭s7ryf3925pivug


    There already are decent enough vents at each end of the roof.

    Googling, it looks like the way it is done, with no gap between the wall and the insulation board is the standard approach? I'm not sure whether the ad-hoc vents in the eaves is a good idea or not.

    There is ivy growing into the roof between the insulation board and the metal at one point. I guess that isnt helping because there is supposed to be a gap between them. Not easy to access where it is happening. Doubt it is the only factor.


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