Wed, 29 Apr 2026 01:07:59 +0100 https://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=11999#Comment_11999 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=11999#Comment_11999 Sun, 06 Jan 2008 23:09:33 +0000 krishna
http://www.wnibi.com/pages/PRdetail.aspx?articleId=18551]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12086#Comment_12086 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12086#Comment_12086 Tue, 08 Jan 2008 14:11:02 +0000 Ads
Interestingly, their pricing for standard centre pivot windows matches Velux exactly! Prices for the triple glazed alternative are typically 30% more expensive, with some sizes around 15% more and others almost 50% higher. You pays your money...]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12087#Comment_12087 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12087#Comment_12087 Tue, 08 Jan 2008 14:45:34 +0000 skywalker
Yes one I recently installed had coated aluminium flashings/external finish. I got it because was significantly cheaper that Velux (same spec) from my local supplier!

I'll have a look at the triple glazed ones for the next stage - didnt know about them

S.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12211#Comment_12211 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12211#Comment_12211 Thu, 10 Jan 2008 18:29:04 +0000 mbartosik
For anyone reading from elsewhere, try looking for windows with "Heat Mirror" films. Adding a 3rd layer of glass makes the window heavier which is not typically an issue unless you want impact resistance or lamination for sound deadening. The Heat Mirror films are very light weight and come in various formulations and single and double coated. Alpen make windows with up to 3 films (4 gas spaces) and up to double coated. The more films and coatings the more the tinting effect, so it is important to see an example. I'm ordering mostly with two single sided films (some with two double sided films). The center of glass R value is about 9.5 (US units) for two single sided films.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12228#Comment_12228 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12228#Comment_12228 Thu, 10 Jan 2008 21:15:24 +0000 jamesingram
Any news on them

thanks Jim]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12270#Comment_12270 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12270#Comment_12270 Fri, 11 Jan 2008 13:44:43 +0000 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12455#Comment_12455 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12455#Comment_12455 Mon, 14 Jan 2008 12:26:00 +0000 jules Any other comments/suggestions gratefully received.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12458#Comment_12458 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12458#Comment_12458 Mon, 14 Jan 2008 13:09:19 +0000 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12466#Comment_12466 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12466#Comment_12466 Mon, 14 Jan 2008 13:35:59 +0000 CWatters
If Building Control are involved check if the amount of glazing you propose is more than 25% of the floor area of that room. If it is then the BCO may require more detailed calculations to be carried. This may require you to put more insulation in the walls to compensate...but that's getting ahead of things. Make sure the flat roof isn't required to be used as a fire escape from upper floors.

Re availability.. Google suggests triple glazed sealed units (eg the glass only) is available in the UK from several sources. Presumably they can be fitted in any non-opening frame designed to take units of that thickness ...

Just examples (i've no experience with these co.)..

http://www.tisu.co.uk/
http://www.hillleighglazing.co.uk/sealed.htm
http://midlandglassltd.co.uk/content/view/26/40/
http://www.treforestglass.co.uk/double-glazed-units/]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12467#Comment_12467 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12467#Comment_12467 Mon, 14 Jan 2008 13:38:50 +0000 CWatters https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12473#Comment_12473 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12473#Comment_12473 Mon, 14 Jan 2008 14:50:31 +0000 caliwag https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12477#Comment_12477 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12477#Comment_12477 Mon, 14 Jan 2008 15:35:43 +0000 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12480#Comment_12480 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12480#Comment_12480 Mon, 14 Jan 2008 16:17:30 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12525#Comment_12525 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12525#Comment_12525 Mon, 14 Jan 2008 22:42:01 +0000 Mike (Up North)
Going back to the BRFC rating method. having looked at their info does anyone have any typical values for the m3/m2/hr figure for the infiltration. I'd like to try some approx calculations but dont have any idea what sort of values to expect or what would be given for the infiltration value by manufactures for different window types. From their info sheet this is x 0.0165 to get a w/m2K value to add to the U-value (happy with those). This is subtracted from the solar gain bit. I'd be inclined to ignore the gain and judge on simple losses, but right now i'm just trying to get afeel for their ratings.

Cheers, Mike up North]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12544#Comment_12544 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=12544#Comment_12544 Tue, 15 Jan 2008 13:27:12 +0000 jules
j]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13112#Comment_13112 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13112#Comment_13112 Tue, 22 Jan 2008 20:29:30 +0000 jamesingram I've copied it below
I presume these prices are unfinished soft wood preglazed ?

"Triple glazed soft-coat Scandinavian-style timber windows being quoted at £300-330/m2 delivered, presumably less for a whole office block. The cost of triple over double is so small as to make it a no-brainer - but the choice of UK suppliers whose rebates are deep enough for 4-12-4-12-4 units is few:

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. That 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 also be made up into slim-sightline facade frame assemblies.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13147#Comment_13147 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13147#Comment_13147 Wed, 23 Jan 2008 03:44:42 +0000 fostertom Posted By: jamesingramI presume these prices are unfinished soft wood preglazed ?Yes, but factory finished (stain or opaque stain 'paint').]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13156#Comment_13156 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13156#Comment_13156 Wed, 23 Jan 2008 11:20:21 +0000 James Norton
J]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13176#Comment_13176 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13176#Comment_13176 Wed, 23 Jan 2008 14:54:43 +0000 Ian Ashton If anybody has experience of these as triple or have even seen the brochure....]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13193#Comment_13193 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13193#Comment_13193 Wed, 23 Jan 2008 18:11:54 +0000 James Norton
J]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13240#Comment_13240 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13240#Comment_13240 Thu, 24 Jan 2008 13:11:01 +0000 fostertom https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13694#Comment_13694 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13694#Comment_13694 Thu, 31 Jan 2008 23:52:43 +0000 haggis Let me remind folk that in the north of the UK we are almost Scandinavian, geographically and in climate. The vast majority of Scandinavian glazing is 3g and well engineered - and for years folk in this part of the world naturally glance east to our nearest neighbours and note with interest their ideas and concepts. Some are considered and some discarded. Look at the 97% Heat Pump usage in Scandinavia - now there is another debate!!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13695#Comment_13695 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13695#Comment_13695 Fri, 01 Feb 2008 07:48:54 +0000 Mark Siddall
In this context also I have to agree with mbartosik HeatMirror is very good for rooflights and, using the 0.3mm PET low-e coated film, you can get 3G performance in the space of a 2G. You can download CP U-value calcs from the HM website, be sure to use the SI units for the U-value (US calcs that do consider radiant losses). HM is now manufactured in Denmark.

HM historically had a problem with delamination but I am assured by HM that this has now been overcome.... not sure how achieved it though.....

Mark
P.S. For vertical glazing HM now do a system with a CP of 0.3W/m2K. (Be mindful of the fact the the g-value is low and may not provide net-solar heat gains.)]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13911#Comment_13911 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13911#Comment_13911 Tue, 05 Feb 2008 08:39:11 +0000 Ian Ashton
Look at old yorkshire dialect words and town names, and then look for the origin, and guess what? Norwegian is the source!
Probably have the same in Scotland.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13951#Comment_13951 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=13951#Comment_13951 Tue, 05 Feb 2008 18:26:56 +0000 fostertom Posted By: haggisThe vast majority of Scandinavian glazing is 3gIs that true? Only Sweden, I believe - Norway has stuck to 2G.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=14185#Comment_14185 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=14185#Comment_14185 Fri, 08 Feb 2008 13:26:44 +0000 mark_s
>>Timber could not hope to achieve this, even with a regular maintenance regime.


Oh Bugger! My windows must be figments of my imagination.]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=14193#Comment_14193 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=14193#Comment_14193 Fri, 08 Feb 2008 14:41:15 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=14199#Comment_14199 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=14199#Comment_14199 Fri, 08 Feb 2008 14:59:58 +0000 Ian Ashton
At last we have an answer, they do triple glazing.

Centre pane or overall U value Mr Velfac?

Must be quality lead paint on those windows Tony & Mark!]]> https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=14200#Comment_14200 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=14200#Comment_14200 Fri, 08 Feb 2008 15:04:38 +0000 tony https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=14203#Comment_14203 https://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=527&Focus=14203#Comment_14203 Fri, 08 Feb 2008 15:16:11 +0000 Tuna
Firstly, your sample is skewed. You don't see rotten Victorian frames.. because they rotted and were replaced. Just because your windows have lasted a long time doesn't mean all Victorian windows lasted a long time.

Secondly, building styles were designed to protect the window - deep insets kept the frames out of the weather, whereas today windows are placed a short distance from the wall surface and are much more exposed. I'm not sure there were that many Victorian timber framed rooflights?

Thirdly, wasn't the sort of timber used very different to modern supplies? Hardwoods, much slower growing softwoods and significantly slower seasoning all made for much more durable materials, which in today's industry would cost significantly more. Whether they were as sustainable, or as scalable to mass production is open to question.

Finally, I suspect the Victorian attitude of 'make do and mend', combined with a much larger manual workforce made maintenance a completely different game from todays 'fit and forget' ethos.

So I don't see the problem with a company trying different techniques to extend the lifespan of modern, mass produced and affordable timber frames?]]>