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Condensation in attic

  • 26-12-2011 1:49pm
    #1
    yllw.ldbttr
    Registered Users Posts: 1,669 ✭✭✭


    I had an attic stairs fitted earlier in the year, and so it's the first time I've ever gone into the attic in the winter.
    The house is about 10 years old, and I had the attic floor re insulated about two years ago.

    A couple of days ago I noticed a large amount of condensation on the inside of the roof, formed on the felt. For the most part it was not heavy enough to drip onto the attic floor but there were drips in parts. It was not a particularly cold day, maybe 5 or so degrees outside.

    Should I be worried about this, or is it a common occurence?
    Is there a lack of air circulation in the attic, and would this likely cause damage to the timber in the long term?

    I would appreciate any advice/ thoughts.

    Attached a couple of pics.


Comments

  • #2
    hop2it
    Registered Users Posts: 151 ✭✭hop2it


    I had the same problem with last house about 10 years ago it turned out to be lack of air flow we installed two vented tiles in the roof and it solved the problem for us
    hope this helps


  • #3
    horse7
    Registered Users, Registered Users 2 Posts: 3,745 ✭✭✭horse7


    yes,definately you need more air circulating in your attic.


  • #4
    yllw.ldbttr
    Registered Users Posts: 1,669 ✭✭✭yllw.ldbttr


    hop2it wrote: »
    I had the same problem with last house about 10 years ago it turned out to be lack of air flow we installed two vented tiles in the roof and it solved the problem for us
    hope this helps


    Was it a big job?


  • #5
    Gareth2011
    Closed Accounts Posts: 579 ✭✭✭Gareth2011


    Have you checked the eve's to make sure the insulation isn't in the vents? Remember the vents allow air into the attic so make sure the insulation isn't blocking the vents at the end of the rafters.


  • #6
    yllw.ldbttr
    Registered Users Posts: 1,669 ✭✭✭yllw.ldbttr


    Gareth2011 wrote: »
    Have you checked the eve's to make sure the insulation isn't in the vents? Remember the vents allow air into the attic so make sure the insulation isn't blocking the vents at the end of the rafters.


    Checked that, they are clear. Thanks.


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  • #7
    creedp
    Registered Users, Registered Users 2 Posts: 5,765 ✭✭✭creedp


    yllw.ldbttr wrote: »
    Checked that, they are clear. Thanks.

    Make sure your attic door/stairs is well sealed as warm moist air escaping into the cold attic will result in condensation on the attic. The more ventilation you have in the attic the better to remove this condensation but sealing the attic entrance will cut down on the amount of condensation in the first place.


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