The igloo is a snowhouse that was used by the Inuit as a temporary shelter on extended winter hunting trips, but not as a permanent home. An igloo can be built in about twenty to thirty minutes - depending on the quality of the snow and the skill of the builder.
How are Igloos made?
Blocks of snow are cut from snow banks using a snow knife and are arranged in the shape of a dome - not row upon row, but rather in a single spiral. Joints are filled in with snow and a hole is cut for ventilation.