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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.

PLEASE NOTE: A download link for Volume 1 will be sent to you by email and Volume 2 will be sent to you by post as a book.

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    • CommentAuthorminisaurus
    • CommentTimeDec 23rd 2024 edited
     
    This might interest some. We have new baclony doors! wood on aluminum frame, with a window, supposedly U-value 1.0 W/(m2.K). (Probably this one: https://www.swedoor.se/produkter-sv/ytterdorrar/advance-line-classic/classic-castilla-ytterdoerrar - sorry can't find a site in English)

    Triple-glazed. The triple glazing works fantastic, and the solid parts seem to also keep out the cold.

    But - see photo - that join where the glass pane meets the wood - ouch! 12 or 13 degrees when its 4 or 5 outdoors and 20-21 indoors.

    Interestingly our 40 year old original windows have identical temperatures at this junction.

    I wonder if any door manufacturers have cracked this issue.
      RB00032X.JPG
    •  
      CommentAuthordjh
    • CommentTimeDec 23rd 2024
     
    I just looked at our balcony doors and patio doors. Indoor and outdoor temperatures are about the same as yours here and now. Sorry I've only got an IR thermometer so no pretty picture :( At your 12.7°C location ours are both 14.8°C (well except it's the left hand corner rather than the right hand corner that is coldest in our case for some reason). Both doors are on the south facing wall, so it's the east corners. All the normal windows are a degree or two higher as are the other corners of these doors. The east balcony door is the primary opener (the west is a secondary opener). The east patio door is a fixed pane (the west is a lift and slide opener). Everything is supposedly PH certified.
    • CommentAuthorminisaurus
    • CommentTimeDec 23rd 2024
     
    Interesting. 14.8°C - what was the outdoor temp?

    This coolness is maybe something that's impossible to get away from ...
    •  
      CommentAuthorfostertom
    • CommentTimeDec 24th 2024
     
    Isn't it just glass spacers which aren't as hi-spec as you thought they were?
    • CommentAuthorminisaurus
    • CommentTimeDec 24th 2024
     
    Yes, fostertom, I think you may be right - I'll post two pictures that will hopefully help.

    One positive is that the new glass shows measurements 2 degrees higher than the 40 year old glass (also triple).
      RB00035X.JPG
    • CommentAuthorminisaurus
    • CommentTimeDec 24th 2024
     
    next image
      RB00035Y.JPG
    •  
      CommentAuthordjh
    • CommentTimeDec 24th 2024
     
    Posted By: minisaurusInteresting. 14.8°C - what was the outdoor temp?
    As you said, 4 or 5 degrees. I assumed °C.

    But actually I've just realised that I read the wrong point. I measured in the corner of the frame, where it joins the reveal wall and the floor. The corner of the glazing is actually warmer. Outside temperature is 11°C today though.
    • CommentAuthorminisaurus
    • CommentTimeDec 25th 2024
     
    Yes °C. Looks like your PH doors perform better than our new Nordic ones! Oh well, I'm sure the energy loss isn't massive ...
    • CommentAuthorMike1
    • CommentTimeDec 27th 2024
     
    Posted By: fostertomI wonder if any door manufacturers have cracked this issue.
    Yes, that would be my guess too. When I last looked - a couple of years ago - the best I found were:

    Rolltech : Multitech G (5.3 m.K/W)
    Technoform Glass Insulation GmbH : Technoform Spacer SP16 (5.1 m.K/W)
    Vetrotech Saint-Gobain : Swisspacer Ultimate (5.1 m.K/W)
    •  
      CommentAuthordjh
    • CommentTimeDec 27th 2024 edited
     
    • CommentAuthorminisaurus
    • CommentTimeDec 27th 2024
     
    Ok, so next time, looks like I should try & get glass with plastic-based spacers?
  1.  
    Posted By: minisaurusOk, so next time, looks like I should try & get glass with plastic-based spacers?

    Yes the plastic-based spacers ( AKA warm edge ) do work. Where I have the aluminium spacers I get condensation along the bottom edge of the glass and with the warm edge there is no condensation.

    Unfortunately over here the warm edge are more expensive - but IMO worth the extra especially if you have timber frames where the condensation could promote rot in the long term.
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