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Secondary glazing: Single pane or Double Glazed Unit?

  • 27-11-2011 10:15pm
    #1
    deandean
    Registered Users, Registered Users 2 Posts: 2,236 ✭✭✭


    I've got a couple of lovely old timber windows (single glazed) that I'm gonna put an internal secondary glaze over. They never need to be opened so I am planning to make a timber frame, glazed, that fits inside the existing window. Each window is about 1.1 metre square.

    I could use 4mm glass, or I could spend more and get double-glazed units. In either case the fit will be fully draftproof.

    I'm not good enough at the calculations to work this out: Is there any significant thermal advantage in using a DG unit over single glazed?

    Also, should I put silica gel or similar in the gap between the existing window and the secondary glazing; & where to get same?

    Thanks,
    Dean.


Comments

  • #2
    Guinness69
    Registered Users Posts: 92 ✭✭Guinness69


    There are loads of things on youtube about that . I'm doing the same in a few rooms that have old windows.

    http://www.youtube.com/watch?v=RExXwCNP9No&feature=related

    That will bring up a load of pages on the side. I'm thinking of making frames with acrylic glass . I as wondering about getting the same stuff they use in fridge doors for the seal .


  • #3
    Guinness69
    Registered Users Posts: 92 ✭✭Guinness69


    Another one . http://www.youtube.com/watch?v=Ind2jswZuX0&feature=related

    I bet this is easy to make. If your not able to do it you will know someone that should be well able .


  • #4
    antoinolachtnai
    Registered Users, Registered Users 2 Posts: 9,808 ✭✭✭antoinolachtnai


    I would give these guys a shout.

    http://www.windowsealflyscreens.com/

    Harold there quoted me for mine. For a bigger window (about 1.8 sq m) it was working out a few hundred each. These windows open. It would be cheaper if it didn't open.

    It may be fire/building regulations requirement that windows can be opened. You need to check on that. You also have to have some way to clean.

    I have 6mm glass. It keeps out a lot of cold. Would double-glazing be better? Probably, but it would be a lot more awkward. I do not think the saving would be very much.


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