Mon, 17 Aug 2026 01:01:25 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11288#Comment_11288 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11288#Comment_11288 Thu, 20 Dec 2007 13:24:09 +0000 Neil Adam Hall
Could anyone propose a standard m2 rate for replacing single glazing with double glazing in a large office block?

Im estimating a potential £150,000 15 year energy saving if this was done, and just wanna see if its feasible.

Cheers!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11298#Comment_11298 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11298#Comment_11298 Thu, 20 Dec 2007 15:24:45 +0000 nigel
Replacing single with dg is not normally cost effective in its own right.

Have you considered secondary glazing or other insulation options?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11299#Comment_11299 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11299#Comment_11299 Thu, 20 Dec 2007 16:14:46 +0000 tony
Any dg units yo want supplied at £300 /m^2 I am up for bringing them to you.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11302#Comment_11302 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11302#Comment_11302 Thu, 20 Dec 2007 17:54:01 +0000 nigel
What spec are you going to provide for your £300/m2?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11303#Comment_11303 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11303#Comment_11303 Thu, 20 Dec 2007 18:23:14 +0000 jamesingram for around £400-500 m2
Cheap UK UPVC plastics I'd of thought on that scale would be around £100m2 supply and fit perhaps less]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11306#Comment_11306 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11306#Comment_11306 Thu, 20 Dec 2007 19:45:57 +0000 biffvernon https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11308#Comment_11308 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11308#Comment_11308 Thu, 20 Dec 2007 20:38:17 +0000 tony ]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11318#Comment_11318 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11318#Comment_11318 Thu, 20 Dec 2007 22:16:42 +0000 biffvernon https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11319#Comment_11319 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11319#Comment_11319 Thu, 20 Dec 2007 23:12:02 +0000 tony ]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11328#Comment_11328 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11328#Comment_11328 Fri, 21 Dec 2007 12:09:48 +0000 fostertom
Russell Doortech, manuf'd in Glasgow or by Norwegian associate, 0141 958 0444 (whose quote I have recently accepted)
Tanums (import) 0115 9321013
SP (import) 01347 825610
The above three are in that price range; the following are more:
Sashless, manuf'd in Yorks to a design developed at my request 01609 780202
Green Building Store, manuf'd in Yorks, the eco bees knees but very expensive 01484 653765

The absence of several household names, who can still only do double glazing, is striking , incl. Rationel (import), Eco Merchant (Vrogum import), Scandinavian Window Systems (various import), and giant empire Inwido who have swallowed the once-excellent Swedhouse. The the majority of suppliers included are UK manufacturers in also surprising - Howarth, of Air-Supply Window fame, have a design under development too. A few other companies blew the invitation to quote in one way or another, so there may be others.

Other companies e.g. Vrogum and Inwido do even higher-spec 3G windows with 4-16-4-16-4 glass and frames timber/cork laminated frames, for European-market Passivhaus etc use. And there's Canadian sources, esp. interesting glass-fibre framed - Paul in Montreal has the info.

There are other ways of doing triple glazing e.g. Velfac's aluminium outer/timber inner stuff, which can be made up into slim-sightline facade fame assemblies - maybe of interest for office block?]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11337#Comment_11337 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11337#Comment_11337 Fri, 21 Dec 2007 13:53:03 +0000 biffvernon https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11345#Comment_11345 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=1015&Focus=11345#Comment_11345 Fri, 21 Dec 2007 14:43:41 +0000 fostertom 1. It's true that squeezing skinny 4-6-4-6-4 3G units into a small rebate designed for top-notch 4-16-4 2G units is counterproductive - more cost, less performance - unless you're paying for Krypton fill anyway, in which case 6mm gap is optimal.
2. For windows expecting major insolation, 2G may give better whole-heating-season performance than 3G; but a) I'm unconvinced; b) how many windows really truly get that much sun, and the building configured to take advantage of same?]]>