2 ms·
I didn't see addressed in the article, what about the ground? What keeps air from leaking out through porous sand and rock?
by packet_nerd 7y ago
I didn't see addressed in the article, what about the ground? What keeps air from leaking out through porous sand and rock?
- jmull 7y agoI would guess by coating the floors/ground with sealing coating (and walls and ceilings if you're underground). It might need to be nice and thick to withstand wear, but maybe not that thick depending on how tough the sealant is, how regular the surfaces and how well maintained.