Because
they have to take long distance to hunt for food
They live permanent homes of stone or earth. How ever, their some are useless when the Eskimoes have to travel great distance to hunt for food. During such periods, they need temporary homes to live in and the only available materials that the Eskimoes can use are ice and snow. Given the absence of usual building materials, the indigenious Eskimoes have learnt to utilize the snow and convert it into a snug, warm shelter called an igloo. In the language of the Eskimoes, the word “igloo” simply means house. The igloo is made of blocks of hard packed snow fitted together to make a low, domed-shapped building.