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re: do you know the aerogel panels (r=50)?
20 aug 2001
john fleet wrote:
>> at $5/(r40) board foot, they might be a bargain in a thin roof.
>i never heard tell of them before! what are they made up of,
>polystyrene/fibreglass/cellulose or something else?
silica aerogel in a vacuum between two al foils. nanogel(?) in albuquerque
can make boards up to about 30"x50", limited by yield and pinholes, as in
ics. they become about r4 per inch if they lose their vacuum.
>it sounds like they might be ideal for a flat roof.
or refrigerators or mobile homes. thin walls help small objects more
than large ones. we might tuck pvc 8" water-filled natural cooling pipes
between roof trusses and use this stuff to insulate above them.
>how thick is the board if it rates at r40?
us r40 would be 1"... i've seen 1/4" r10 samples.
nick
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