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While you think in terms of conventional attics, I think in terms of geodesic dome, with minimal material composition. Like aluminum plating weather shell with a tensioned fabric or foil inner shell.
Also I wonder whether the foamed aluminum can pass air or Nitrogen gases. If so it might be an ideal material to cast nose cones for atmospheric reentry.
edit:
To be clear, the space between the inner and outer shell replaces the attic. But it's a dynamic system (down on the shady side, up on the sunny side) instead of a stagnant pool. Don't get me started on engineered roofing trusses.
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Last edited by freebeard; 05-02-2024 at 08:39 PM..
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