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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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General: Visibility through 2 and 3G windows.

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    • CommentAuthordickster
    • CommentTimeDec 10th 2007
     
    We moved to the sticks and will be building a super dupa eco house in 18 months time. The house is being designed around the views over the heath and moorland. We want to use 3G as much as possible, but what will all these coatings on the glass do to our perception of the views?

    Anyone any ideas?
    • CommentAuthortony
    • CommentTimeDec 10th 2007
     
    You wont notice until you compare by looking through an open window. Even then it difficult to see a difference.
    • CommentAuthorCWatters
    • CommentTimeDec 10th 2007
     
    Modern coatings sometimes make the windows look dusty when the sun shines on them at an angle but that applies to 2D as well. Otherwise what Tony says. You won't notice anything.
    • CommentAuthordickster
    • CommentTimeDec 11th 2007
     
    Thanks very much, that's another concern sorted.
    • CommentAuthorbiffvernon
    • CommentTimeDec 11th 2007
     
    Hang on. If you are really fussy, 'soft coat' is even more invisible than 'hard coat'. It also gives better thermal performance, is more expensive and not every supplier supplies it. Hard coat can give a slight blueish haze when strong sunlight hits at a shallow angle. I can see it as I know what to look for but most folk don't seem to notice.
    • CommentAuthordickster
    • CommentTimeDec 11th 2007
     
    Aha!
    I thought there might be some difference. Thanks very much. I'm rather anal when it comes to this sort of thing. Once paid for and installed, it would be pretty disastrous to find we had a choice but didn't know it.

    Ta again.
    • CommentAuthorhowdytom
    • CommentTimeDec 12th 2007
     
    Does any one know if different type of glass are better for growing plants under, I'm planning a lean-to greenhouse/consevatory and single glazing would be a NoNo
    tom
    • CommentAuthorbiffvernon
    • CommentTimeDec 12th 2007
     
    'Horticultural' glass.
    ;)
    • CommentAuthortony
    • CommentTimeDec 12th 2007
     
    tom, why is single glazing a no no? The heat loss from a lean to would be huge if heated and therefore ungreen, if not heated then single glass would be OK.
    • CommentAuthorhowdytom
    • CommentTimeDec 13th 2007
     
    Tony, I was hoping to store the heat gained during the summer underneath it, and construct some kind of insulative cover to use at night time, maybe a multifoil Biff ?
    tom
    • CommentAuthorbiffvernon
    • CommentTimeDec 13th 2007
     
    I've no idea what a multifoil Biff is but storing solar heat from summer to winter needs massive civil engineering, perhaps appropriate to a major new build, but not the sort of thing for an ordinary house with a lean too. Or just what are you proposing?
    • CommentAuthorhowdytom
    • CommentTimeDec 13th 2007
     
    biff,
    "a multifoil biff" could be well insulated, draught proof, maybe invisible to infra red night vision and unable to make those annoying outside lights come on, worth a thought ?. Sorry... I missed out a comma on the last post.

    I'm considering a barn conversion and as posted on other threads, fancied trying the umbrella insulation(passive solar), then I started getting grand designs, pumping summer air from loft into the sub-base (solar powered fan), which lead to having a lean-to greenhouse/conservatory 5m x 10m (large but very useful for food growth and kids)
    I realised that the heat in summer could be unbearable so lots of ventilation/shading screens... Why not pump that air under the slab in summer. Tee shirts in winter !!!:cool: We grow most of our food but I would like a lime tree and a few other exotic fruit n veg. So what glass to use ? We have a lean-to with that horrid triple wall plastic on the present home. peaches and grapes do well even though its opaque
    Any advise and sorry to hijack this thread a little.
    tom
    • CommentAuthorIan Ashton
    • CommentTimeJan 28th 2008
     
    try low iron glass

    Pilkingons optiwhite is one example.

    Increases Solar Gain

    By the way, laminated glass cuts out 98% UV.
    • CommentAuthortony
    • CommentTimeJan 28th 2008
     
    Doesn't normal glass cut out almost all UV too?
    • CommentAuthorTheDoctor
    • CommentTimeJan 28th 2008
     
    <blockquote><cite>Posted By: howdytom</cite>Tony, I was hoping to store the heat gained during the summer underneath it, and construct some kind of insulative cover to use at night time, maybe a multifoil Biff ?
    tom</blockquote>


    i remember seeing pictures of a japanese greenhouse (professional horticultural facility) that had two skins of glass about 75 mm apart.
    By day, the sun streamed in and all was well. By night, a fan filled the void with polystyrene balls (a la beanbag) and kept the heat in. Morning, and the whole lot was sucked out again.

    Interesting thought?!
    • CommentAuthortony
    • CommentTimeJan 28th 2008
     
    Dead good idea -- why dont we do it on houses??

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