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Old 08-17-2021, 02:49 PM   #21 (permalink)
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That hut is not space efficient

Energy efficiency is based on internal area versus contact surfaces
Beg to differ.

The half cylinder has less area than a box of the same dimensions. The minimal surface area would be an hemisphere.

But it's only half the story. Air stagnates inside a box. So long as it's not thwarted by internal partitions, the half cylinder will have an automatic air circulation driven by the temperature difference between inside and outside.

For spray on roofing Cork paint [is greater than] polyurethane foam. What's the mechanism for mold growing on metal? I know there's mold growing on the outside of the ISS, but what, trapped moisture?

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