misted double glazed windows

Discussion in 'Windows and Doors' started by elcaro, 14 Oct 2009.

  1. elcaro

    elcaro

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    I've replaced a few but I wonder if these could be fixed? I thought of trying drilling a few mm hole at say bottom right hand corner and another at top left hand corner and blowing warm air through in the hope of clearing the condensation, then seal holes. (Might have to be repeated at intervals.) Any thoughts?
     
  2. PrenticeBoyofDerry

    PrenticeBoyofDerry

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    It is possible to sort out, A small hole is drilled in the glass (can be done from outside in most cases) and a tiny vent installed.
     
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  4. Diyisfun

    Diyisfun

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    Put a new unit in.
    The reason it mists is because its not sealed anymore, so start drilling holes, how can that fix it.
    Its the glass where the seal has gone, not the frame.
     
  5. JohnD

    JohnD

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    the drilled hole does actually work :eek: and you can do it with a tiny diamond bit

    but modern glazed units are often toughened glass that will craze

    in the old days before sealed units, if you made your own double glazing, you vented to the outside (cold air is drier than indoors air). You only need a tiny hole to equalise pressure as it changes with temperature, and I can describe how to do it if you want. The sidelight beside my front door is still done that way and is always mist-free.
     
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  7. Mw Roofline

    Mw Roofline

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    Proper advice. Don't get drilling holes
     
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    DIYnot Local

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