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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
These two books are the perfect starting place to help you get to grips with one of the most vitally important aspects of our society - our homes and living environment.

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Products: Warm edge spacers - rip off prices?

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    Hi,

    Our joiners have spoken to their glass supplier to get relative prices for SGG low-e glass vs SGG's warm edge spacer units and they have said there is approximately a four-fold increase in price.

    How can this possibly be? Are they shafting the high-spec green market?

    Also I read on a page about SuperSpacer that "once the outside temperature dips to -17.8C outdoors condensation will form on double-glazed glass even at only 15% humidity internally". If this is the "big sell" for warm edge, why am I even bothering? I don't see us having -17C in Gloucestershire for the next 10+yrs ... The Day After Tomorrow it isn't quite.

    Can anyone explain this ludicrous pricing, explain whether I -really- would benefit from warm edge (timber frames with multiple small panes so a lot of edge). If they improve the efficiency significantly fine, but if they're only to stop theoretical condensation and silly low temperatures, surely there's no point especially given the apparently huge increase in cost.
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    For what it's worth, we have windows in Montreal which, as far as I know, have warm edge spacers. We sometimes get a small amount of condensation on the bedroom windows when the temperature outside is below -25C - but it's not always the case. Certainly the RH inside the house is much higher than 15% - a level that low is unbearably dry. The condensation is just at the bottom 1cm or so of the glass and has never been of sufficient volume to run off the windows and form a pool. The rest of the glass is unaffected.

    Paul in Montreal.
    • CommentAuthorGBP-Keith
    • CommentTimeAug 25th 2007
     
    Look up Holdens in Birmingham Marc. they manufacture with superspacer warm-edge and last time I bought from them the prices were sensible and trade. But you will need to collect from them.

    Warm edge is fantastic. I've had it installed for ten years now with very little condensation problems but it cannot be completely ruled out.

    Just checked and their website seems to be down but here is a phone number. this works as i just tried it and got an answerphone (saturday): 0121 7897766

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