This seems to be the most recent Bowlus thread.
I've been thinking about the Cybertruck (and the potential for a Cyberhouse), and it went from stainless steel being an electrical insulator to thermal insulation.
Quote:
Aluminum simply has a relatively higher thermal conductivity. On the other hand, stainless steel has one of the lowest thermal conductivities for metal alloys.
Another metric used to track thermal conductivity is the British thermal unit (BTU), which uses a number to represent the ability of a material to conduct heat. Aluminum has BTU of 118 while steel has 17. Comparing both to another material like copper, which has a BTU of 223,
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https://onesky.ph/blog/thermal-condu...teel-aluminum/
The gored and riveted construction from the 1930s is compatible with 30x stainless steel.
For the home builder, maybe a single layer stainless exoskeleton with a
spray-on cork inner lining?
Quote:
What is Cork Spray
https://www.corkco.ca/single-post/20...is-Cork-Spray-
Cork spray has tremendous value when compared to stucco. The best way to describe cork spray is, it's a green alternative to stucco. Cork Spray resembles stucco as far as the way it looks but, feels soft because of the cork granules in the cork spray.
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edit: To be answered: relative cost of materials.
2nd edit: I cleared this with the relevant individual (caught him enroute to Bike Week in Daytona FL), so in celebation of my 15,000th post, here is the Cyberhouse:
Five (not four) monocoque boxes supporting a triangular grid. Sound familiar? The boxes are projected from triangles at steep pitch, so with, e.g., a six foot edge the boxes would only be 18-24" thick.
With a low-conductivity skin and spray-on cork lining, plus insulated soffits over the entries, it would be a passive house.