An igloo is a dome-shaped shelter built from blocks of compacted snow, traditionally made by Inuit builders in the Arctic. The word is often used broadly for any snow house, but the classic igloo is a carefully engineered winter structure whose thick snow walls trap air and reduce heat loss.
- Built from cut blocks of hard-packed snow, not loose powder
- Associated most strongly with Inuit communities in the Canadian Central Arctic and the Thule region of Greenland
- Relies on snow’s insulating air pockets to hold warmth inside
- Often used as temporary cold-weather shelter rather than a permanent home
- Different Inuit groups also used other house forms, including whale bone, hides, and snow insulation
What makes an igloo work?
An igloo works because snow is a surprisingly effective insulator. Once packed, snow contains many tiny air pockets, and still air slows the transfer of heat. The walls are thick enough to keep interior warmth from melting the structure too quickly, while the dome shape distributes weight and resists collapse under wind and snow load.
Builders cut blocks from firm snowbanks or drifted snow and fit them into a spiral course, trimming each block so the wall leans inward. The blocks lock together as a shell, and the final seam closes the top. A small entrance tunnel helps trap warmer air inside and blocks wind from sweeping directly into the living space.
Where did igloos come from?
Igloos belong to Inuit architectural practice, but they were not universal across all Inuit regions. They were most common in the Central Arctic of Canada and in Greenland’s Thule area, where conditions and travel patterns made snow shelters practical. In those regions, an igloo could be built quickly from materials available in midwinter, often for hunting, travel, or temporary camps.
Other Inuit communities used different structures. Some built houses from whalebone and hides, then used snow as insulation around them. That distinction matters because it shows the igloo as one solution within a larger and highly adaptable building tradition, not as a single emblem for every Inuit household.
What does an igloo look like in practice?
The familiar image is a small white dome, but real igloos vary in size and finish. A working shelter might be rough and compact, with a low doorway, a sleeping platform raised above the floor, and a vent or loose roof seam to manage smoke from a lamp or heat source. Larger ceremonial or communal snow houses could be more elaborate, with multiple chambers or connected units.
Inside, the space feels enclosed rather than roomy. The walls curve continuously, which makes the interior strong and directs thawing meltwater downward instead of onto a flat ceiling. In photographs and film, that geometry is often what makes an igloo instantly recognizable: a precise snow shell with a narrow entry cut into the drift.
Why igloos still matter
Igloos matter because they show how architecture can emerge from local materials, climate, and technique rather than from imported building systems. They are often treated as a novelty, especially in popular media, but they represent serious knowledge of snow texture, temperature, and structural form. Building one requires judgment about grain, density, and weather conditions, not just stacking blocks.
They also matter as a reminder that Arctic design is not primitive or improvised. It is a refined practice shaped by survival, mobility, and environmental intelligence. When an igloo appears in a photograph, it carries that history of making: snow cut, lifted, trimmed, and fitted into a temporary architecture that can stand in freezing wind and darkness.
Frequently Asked Questions
Are igloos still used today?
Yes, though mostly in specific contexts rather than as everyday housing. Inuit communities may still build snow shelters for travel, demonstration, or short-term use, and similar forms appear in cultural education and winter recreation. Modern materials and permanent homes have changed daily life, but the technique remains part of Arctic knowledge.
Do all Inuit people use igloos?
No. Igloos were most common in certain regions, especially the Central Arctic of Canada and the Thule area of Greenland. Other Inuit groups relied more often on different house forms and used snow mainly as insulation rather than as the main building material.
Is an igloo made from ice?
No, a proper igloo is made from snow, usually dense snow that can be cut into blocks. Ice is harder and more brittle, while compacted snow is easier to shape and has better insulating qualities because of the air trapped inside it. That difference is central to how the structure stands and stays warm.