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Signing UpStep 1: How to build an igloo
1. Find a suitable piece of land that won't sink or collapse on you.
2. Cut blocks from dry, hard, snow using a snow saw (yes, these do exist). Each of these blocks should be 3 ft. long, 15 in. high, and 8 in. deep.
3.Form a circle with blocks around the hole created where you cut the blocks. Cut the circle in a spiral from the top of the last block to the ground ahead of the first block. This will make it easy to construct a dome.
4.Build up walls, overlapping the blocks and shaping them so that they lean inward. Cut a hole under the wall for the cold sink and entrance. Put several blocks along one wall as a sleeping platform.
5.The last block must initially be larger than the hole. Place the block on top of the igloo, then, from inside, shape and wiggle it to slot exactly into the hole.
6.Hot air from your body and stove rises and is trapped inside the dome. Cold air falls into the sink and flows away to the outside. It is essential to cut ventilation holes in the walls with an ice axe (those exist to).
7.Settle in for a cold, harsh, life.






































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Nice instructable.
On a different note I figured I'd provide a photo that perpetuates the igloo stereotype, this was shot in my backyard back in Dec of '06.
http://www.flickr.com/photos/jphphotography/2793378079/
We called it "Pimp My Igloo : Surviving a Saskatchewan Winter In Style"