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Housing - New Build: Triple glazed windows

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    •  
      CommentAuthorfostertom
    • CommentTimeFeb 5th 2009 edited
     
    Posted By: Jofostertom has listed companies he has obtained prices from but he seems to be awol at present
    to contrary, see this thread 28.1.09:
    Posted By: fostertomAbout to go for another round of window quotes, and would appreciate any more suggestions.

    I have a long list of suppliers, prev unknown to me, that have been suggested on this forum - thanks - any last minute additions?

    Any guideline %age comparisons between
    a) all-solid-wood Scandinavian-style 3G apx 1.0 Uw, as I previously reported @ £300-330/m2 delivered on this thread p3 21 Dec 07
    b) ditto but aluminium faced externally
    c) as above but Passivhaus-grade 0.8 Uw
    I'm on same trail as you, once more, but no response from GBF (or AECB) members so far.

    Exchange rate very unfavourable now, compared to 1.5yrs ago - any guess what %age effect on European windows, over that period?
    • CommentAuthorralphd
    • CommentTimeFeb 5th 2009 edited
     
    That's quite expensive.
    I'm getting 43x94" triple-glazed windows for the indoor pool I'm building. Price <CAD600 ea ($625 less winter booking discount). LowE is PPG Sungate 500.
    •  
      CommentAuthorfostertom
    • CommentTimeFeb 5th 2009
     
    That's an exceptionally large simple window - I guess a similar one amongst the mixed bunch I got priced wd have been £200/m2 - yours is $162/m2 - still cheaper. Ours will have gone up a lot since them due to £-E exchange rate.
    • CommentAuthorralphd
    • CommentTimeFeb 5th 2009
     
    I've calculated that up to 3m^2 bigger is better. Lower cost per m^2, higher ratio of glazing:frame, and lower U-value than smaller windows.
    Somewhere between 3^2 and 4m^2 costs start going up (thicker glass required), cold-weather performance drops (more contraction of the airspace - Charles' Law), and handling gets difficult (more than 2 men needed to install).

    -Ralph
    • CommentAuthorJo
    • CommentTimeFeb 5th 2009
     
    For info, here are 2 prices I've been quoted this week.

    Taking one large window:-
    Floor to ceiling, 3750mm x 2325mm opening, divided vertically into 4 fixed glazed panels.

    Prices are for:
    timber
    4-16-4-16-4/argon/toughened
    warmedge
    Prices ex. VAT

    1. £1704.79
    2. £1670.18
    •  
      CommentAuthorfostertom
    • CommentTimeFeb 5th 2009
     
    Cheep! £191.50/m2
    • CommentAuthorImogen
    • CommentTimeFeb 5th 2009
     
    Hi Jo,

    I am also looking for windows. Could you tell me where you got those prices?
    •  
      CommentAuthorrogerwhit
    • CommentTimeFeb 6th 2009
     
    A quick arithmetic suggests that it could be supplied in seasoned oak for that - without finish or fitting. Roughly - oak £450, glass £650, making £600. Unless my sums were too hasty.

    Nothing opens, Tom.
    •  
      CommentAuthorfostertom
    • CommentTimeFeb 10th 2009 edited
     
    Howarth Timber http://www.howarth-timber.co.uk/windows-doors have a cracking new range of Scandinavian-style 3G windows (not Passivhaus grade) incl Al faced in UK trad standard sizes (prob also do bespoke sizes?) - however their quoted Uw-values are puzzlingly poor. They said they had these under development at the time of my price roundup - see this topic Dec 07.
    •  
      CommentAuthorfostertom
    • CommentTimeMar 4th 2009
     
    Russell, Glasgow - Scandinavian-style 3G, excellent and cheapest 1.5yrs ago, and - they told me yesterday at Ecobuild - still at non-Euro'd prices. That makes it too good to miss - everyone!
  11.  
    I just want to 2nd what fostertom is saying about Russell Timbertech. After reading Fostertoms previous thread about triple glazing I asked Russell TT to quote for the windows for our steading conversion and was blown over at how good their pricing is. Their triple glazing quote beats other quotes we have had back for double glazed units by half. Now we just need to find out if the planning department will accept laminated softwood for our windows.....the joys!

    I hope the quality of their windows is as good as the spec reads - has anyone seen their windows in the flesh?

    spookywood
  12.  
    Are we talking about these chaps:

    http://www.russelltimbertech.co.uk/index.php

    v. interested but can't find anything about 3g...

    J
    •  
      CommentAuthorfostertom
    • CommentTimeMar 4th 2009
     
    Posted By: spookywoodhas anyone seen their windows in the flesh?
    2 jobs completed - excellent, if not the absolute RollsRoyce.
    Posted By: James Nortoncan't find anything about 3g
    Just ask
    • CommentAuthorjules
    • CommentTimeMar 5th 2009
     
    I may have asked this some time ago as well, but anyone know whether any of these companies will supply the glazing (3G) only?
    • CommentAuthorralphd
    • CommentTimeMar 5th 2009
     
    Posted By: ralphd
    That's an exceptionally large simple window - I guess a similar one amongst the mixed bunch I got priced wd have

    I'm about to take delivery on the windows now. I managed to get the price down to CAD574 each.

    -Ralph
    •  
      CommentAuthorrichy
    • CommentTimeMay 10th 2009
     
    Making some 3g windows this week, What did we decide was the optimum airspace between each pane of glass?
  17.  
    Richy,
    It all depends upon which gas you fill the cavity with. Based upon calculations undertaken in accordance with EN673 (rather than physical proof) for double glazing with argon fill 16mm is appropriate, but for krypton 10mm. It also depends upon whether the unit is double or triple glazed. For triple glazing the optimal cavity changes to 18-20mm for argon, and 12mm for krypton.

    The whole systems design of the glazing unit should not be forgotten... the conductivity and width of the spacer bar should ideally be optimised against the additional losses from convection of the inert gas incurred by opting for a slightly wider cavity..... One of the restrictions upon the cavity depth of course is the design of the window frame and the rebate that it has.

    So what cavity width did you go for?

    Mark
    • CommentAuthorAndy M
    • CommentTimeJul 7th 2009
     
    I live in Southern France (Macon area) and am trying to renovate an old farm house.

    Thanks to this thread, I have primarily been looking at triple glazing now but the most recent quote we received (from Tryba), the salesman actually advised us against going for Triple citing a study carried out in France that basically focused on loss of Solar Gain (something I think is spurious as are house faces West with zero south facing windows) but also increased issues with condensation and the extra weight of triple and potential issues that may cause with the fabric of the house.
    Heres the study http://fermetures-rhodaniennes.com/document/82mpvc-SYNC_-391604702.pdf and a 'translated' version http://translate.google.co.uk/translate?hl=en&sl=fr&u=http://fermetures-rhodaniennes.com/document/82mpvc-SYNC_-391604702.pdf&ei=ZnRQStasApKZjAf27u3sDQ&sa=X&oi=translate&resnum=1&ct=result&prev=/search%3Fq%3Dsnfa%2Bcommunique%2Bdu%2B9%2Boctobre%26hl%3Den%26safe%3Doff%26rlz%3D1G1GGLQ_ENUK273

    He also wanted to know what we planned in way of ventilation systems. I want to insulate our house as much as possible naturally but its an old stone farmhouse and is never going to threaten Passivhaus standards so are ventilation concerns really relevant?

    Finally does anyone have any experience with replacemernt windows in France? We've had quotes from KParK who now do a triple glazed window with U Value of 0.6 and Tryba so far and am awaiting a quote from Internorm. As I am a French Tax payer we are entitled to a 40% rebate but at a gross of around €700 m/2 for triple glazing for 9 windows and 2 front doors, I might still be better off looking abroad.

    Ive tried to absorb as much of the info as possible on this thread but Im far from an expert so any advice/guidance would be most appreciated

    Thanks

    Andy
    •  
      CommentAuthordjh
    • CommentTimeJul 8th 2009
     
    The Australians have an interesting guide to houses in different climates. One section deals with glazing and the different factors that need to be assessed - http://www.yourhome.gov.au/technical/fs410.html

    It's common in hot areas to use different types of glazing for the different aspects of a house, I believe.

    There's an interesting report on window frames by the Norwegian SINTEF research organization at http://windows.lbl.gov/adv_Sys/NTNU-LBNL-EuropeanFramesReport.pdf It includes U-values and cross-sections of many frames.
    • CommentAuthorchris h
    • CommentTimeJul 8th 2009
     
    Andy
    It might be worth reflecting on what you are trying to acheive and how to best spend each £ or EURO$. Look out Nick Grant's article here http://www.usablebuildings.co.uk/Pages/UBPublications/UBPubEcoMinimalism.html which (in its earlier version) has provided me with a great deal of guidance. I am no expert but am some way through a barn conversion. I suspect that some of the issues I have encountered will also face you. If airtightness is an issue then you might be better concentrating efforts and $$$ on getting the detailing right rather than getting hung up on triple glazing - also - how will it look in the building? I believe that in some continental countries there is a long tradition of double glazing but using a second inward opening casement - thoughts anyone? How are you insulating the building envelope excluding windows. Are the walls solid? You might get some really useful advice on those elements here too (shame to insulate out all the benefit of solid walls - especially in summer). Happy to pass on my contacts and specs.
    Cheers
    Chris
    • CommentAuthorAthina
    • CommentTimeJan 11th 2010
     
    I am looking for triple glazed hardwood sliding sash windows for a new build cottage in Wales. I have looked at the website of the Swedish firm http://www.spfonster.se/ , as recommended by fostertom a while back but they don't appear to make what I am looking for. Old fashioned style sash that slides up and down. Grateful for any pointers in the right direction.
    • CommentAuthortony
    • CommentTimeJan 11th 2010
     
    try a local joinery copmpany
    •  
      CommentAuthorfostertom
    • CommentTimeJan 11th 2010
     
    Vrogum! but still only 2G AFAIK.
    • CommentAuthorDarylP
    • CommentTimeJan 12th 2010
     
    Athina,

    Where abouts in Wales are you...? I have just sourced some 3g units (36mm) from Derw (S Wales but deliver anywhere) to go in some bespoke hardwood frames for a client.

    Cheers.... :smile:

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