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Thread: Retro-fitted double glazing?

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    Retro-fitted double glazing?

    Anybody availed themselves of retro-fitted double glazing? How good is it? Any pitfalls etc?

    Some outfit called energy saving centre dropped a flyer in my mailbox t'other day offering this service. I'm tempted to have a looksee...maybe get a quote. But I'd like to know how good the retro-fitting bit is...

    Thanks people.
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    I don't know how good it is, but I've been told double glazing is a very broad term and there are many variations on what you get for "double glazing".

    Some are just two glass panels. Some are two panels pressurized in the middle. Others I believe have some sort of nitrogen mix pumped between the panes and sealed.

    No idea which is more effective for retaining heat, but I'm pretty sure the nitro version is the most expensive.
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    Cheapest one is to sellotape glad wrap on the inside, leaving a bit of an air pocket. My energy consious flatmate did it so he could keep his space age foam matress hot enough to work, with an electric heater

    He got some proper stuff recently which shrinks flat with a blow dryer, not too sure if the thin platic is able to stop heat transfer, but it stops air movement.

    Dirt cheap, so I give it a big thumbs meh
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    Quote Originally Posted by The Lone Rider View Post
    I don't know how good it is, but I've been told double glazing is a very broad term and there are many variations on what you get for "double glazing".

    Some are just two glass panels. Some are two panels pressurized in the middle. Others I believe have some sort of nitrogen mix pumped between the panes and sealed.

    No idea which is more effective for retaining heat, but I'm pretty sure the nitro version is the most expensive.
    does anyone do a vacuum version as I would have thought this would be the most affective, probably the most expensive as well

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    My parents added them to their home, the argon filled version IIRC. They're got DVS, solar water heating, heat pumps, flat panel heaters, done the insulation top and bottom, etc etc, and my mother swears that out of all that crap, the retrofitted double glazing is the only one she wishes she'd done years ago.

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    I checked the website of the guys who did the leaflet drop. They use an outer layer of UVPC - optical grade acrylic, fitted to a frame that goes on the outside of the existing window frame. I don't think they do anything about the gas between the layers. Still sounds expensive...

    EDIT: Got a free quote, info session next week. We'll see...
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    vgygrwr

    So anything that provides a gap of still air works. In theory a gap between 15mm and 20mm is best. If you use low emission glass (reflects heat back in) its better and if you use a heavier than air gas (argon) its better. A vaccum maybe best but never seen offered. We built with the cheapest before knowing anything about it. Only has a 6mm gap still makes enormous difference to heat loss, condensation and noise, even works a treat stopping the odd stone from the mower. Not sure how the plastic stuff goes with window cleaning.

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    Quote Originally Posted by Vgygrwr View Post
    Not sure how the plastic stuff goes with window cleaning.
    Window cleaning..? What's that?
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    My son worked as an installer for Magnetite for some time. This is the system that uses UPVC (optical perspex) cut to the size of the window, and secured using a magnetic strip. The magnetic strip is in the edging that is fitted to the panel. A thin metal band / strap is attached to the inside of window frame using double sided adhesive, and the panel attached. It does work very well. It also has the advantage that it insulated the frame on aluminium frame joinery.

    They also used varying thickness of panel (Up to 10mm), as it is a very good noise insulator. He did many central Wellington apartments, and many homes along busy roads and the result was very good.

    The Glass-argon gas- glass double glazing requires re-gassing every so often, so there is an on-going upkeep cost.

    Unfortunately, the Magnetite distributor / agent in the Wellington region went bust. (Not due to the product) and my son no longer works in that industry.

    I believe 3M do a plastic sheet product that you can install yourself. It will work at reducing condensation, but that will be about all.

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    PS.. some of the retro-fit double glazing qualifies for the govt energy efficiency scheme I believe (if it is still going)

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    Quote Originally Posted by slofox View Post
    Window cleaning..? What's that?
    Commonly referred to as "rain".

    For a power wash apply "rain" with "wind"!!



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    Quote Originally Posted by Swoop View Post
    Commonly referred to as "rain".

    For a power wash apply "rain" with "wind"!!
    Oh. Right. I do THAT...
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    Quote Originally Posted by Vgygrwr View Post
    A vaccum So maybe best but never seen offered.
    That's because the glass would break from the 1 Bar pressure on both sides. Unless it was maybe 20mm toughened...
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    Quote Originally Posted by Wannabiker View Post
    My son worked as an installer for Magnetite for some time. This is the system that uses UPVC (optical perspex) cut to the size of the window, and secured using a magnetic strip. The magnetic strip is in the edging that is fitted to the panel. A thin metal band / strap is attached to the inside of window frame using double sided adhesive, and the panel attached. It does work very well. It also has the advantage that it insulated the frame on aluminium frame joinery.

    They also used varying thickness of panel (Up to 10mm), as it is a very good noise insulator. He did many central Wellington apartments, and many homes along busy roads and the result was very good.

    The Glass-argon gas- glass double glazing requires re-gassing every so often, so there is an on-going upkeep cost.

    Unfortunately, the Magnetite distributor / agent in the Wellington region went bust. (Not due to the product) and my son no longer works in that industry.

    I believe 3M do a plastic sheet product that you can install yourself. It will work at reducing condensation, but that will be about all.
    Quote Originally Posted by Wannabiker View Post
    PS.. some of the retro-fit double glazing qualifies for the govt energy efficiency scheme I believe (if it is still going)
    Sounds exactly like what I am looking at.

    I already got a gummint subsidy to fit a heat pump - couldn't insulate because of flat roof but you get it anyway...
    . “No pleasure is worth giving up for two more years in a rest home.” Kingsley Amis

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    We have stuff like this fitted at work. Seems to work fine, my office is always toasty and warm.
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