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Condesation on my double glazed window.

  • 11-12-2019 11:01am
    #1
    kerdiff
    Registered Users Posts: 156 ✭✭


    Hi, does anyone have any ideas what causes this circle of condensation on my double glazed window.


Comments

  • #2
    FlipperThePriest
    Subscribers Posts: 693 ✭✭✭FlipperThePriest


    In the centre of the window? Are these older double glazed windows? If so, might be collapsed glass... 2 panes have eventually warped over time, now meeting each other in the middle and forming the coldest spot, with no air insulating between them.

    We have 2 windows older than the rest in the house. I have the same issue in one of the older windows.


  • #3
    decky1
    Registered Users Posts: 975 ✭✭✭decky1


    You can get the glass replaced you won't have to replace the whole window.


  • #4
    hots
    Registered Users, Registered Users 2 Posts: 5,200 ✭✭✭hots


    Is it on the outside or in between the panes? Condensation can just be a sign that they are well insulated https://www.energlaze.ie/condensation-info/


  • #5
    kerdiff
    Registered Users Posts: 156 ✭✭kerdiff


    hots wrote: »
    Is it on the outside or in between the panes? Condensation can just be a sign that they are well insulated https://www.energlaze.ie/condensation-info/

    The condesation is on the inside.


  • #6
    kerdiff
    Registered Users Posts: 156 ✭✭kerdiff


    zippy84 wrote: »
    In the centre of the window? Are these older double glazed windows? If so, might be collapsed glass... 2 panes have eventually warped over time, now meeting each other in the middle and forming the coldest spot, with no air insulating between them.

    We have 2 windows older than the rest in the house. I have the same issue in one of the older windows.

    The windows are probably 15 years old.


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  • #7
    kerdiff
    Registered Users Posts: 156 ✭✭kerdiff


    zippy84 wrote: »
    In the centre of the window? Are these older double glazed windows? If so, might be collapsed glass... 2 panes have eventually warped over time, now meeting each other in the middle and forming the coldest spot, with no air insulating between them.

    We have 2 windows older than the rest in the house. I have the same issue in one of the older windows.

    In the centre of the window.


  • #8
    Tigerandahalf
    Registered Users, Registered Users 2 Posts: 7,816 ✭✭✭Tigerandahalf


    I get the same along the edges of the windows. I think the pull down blind might be an issue.


  • #9
    PCros
    Registered Users, Registered Users 2 Posts: 2,078 ✭✭✭PCros


    Can you wipe that or is it in between the two panes?


  • #10
    kerdiff
    Registered Users Posts: 156 ✭✭kerdiff


    PCros wrote: »
    Can you wipe that or is it in between the two panes?

    I can wipe it or it just goes away throughout the day.


  • #11
    FlipperThePriest
    Subscribers Posts: 693 ✭✭✭FlipperThePriest


    kerdiff wrote: »
    The windows are probably 15 years old.

    Then I doubt that the 2 panes have collapsed into each other, and this is a different issue. My window is older and of an era when 12 mm gap would have been the standard. I'd say yours are 16mm and shouldn't be old enough to have deflected to the middle to that extent, unless the glass used was just too thin. I'm not entirely sure though.

    Try this maybe - When dark outside, if you look at the reflection of an inside light through the window, with double glazing you'll generally see 2 reflections. Try moving from the edge of the window to the centre and see if the two reflections get closer together as you go toward the middle, if so, you'll know the 2 panes are deflecting toward each other at the middle, and less gap means lower u-value and a colder surface, hence the condensation.


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  • #12
    whizbang
    Registered Users, Registered Users 2 Posts: 1,953 ✭✭✭whizbang


    I think somebody went a bit overboard with the fly spray in the center of that window.
    Clean it thoroughly.


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