If I want to build an igloo to keep me warm in a snowy climate, how can I go about this?
- What size blocks should I cut?
- How big should the entrance be?
- How can I mitigate the risk of the igloo collapsing?
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Building an igloo requires:
In the absence of training and practice, which I would posit is very rare, go with a quinzy instead.
You dig snow and throw it into a big pile. You let that sit for a bit to establish structure, and then you hollow it out. (Instructions on that wiki page and also at http://http-server.carleton.ca/~dmcfet/quinzy.html.)
While a properly built igloo (by someone who knows what they're doing, using the right snow) is solid like a house, a quinzy is safer when an untrained person without equipment wants to build a structure out of whatever snow happens to be on the ground.