Iglu eyenziwa ngokushisisa uhlaka lomuthi wepayini nempuphu yamalahle, futhi ngezinye izikhathi nesibabule sezinyosi. Ingenye yamaglu amadala kunawo wonke esintu — isetshenziswe kusukela eNkathini Ephakathi Yamatshe ukufaka amathuluzi amatshe ezibanjweni zokhuni, ukuvala izitsha zamaxolo, nokwenza ukuhlangana kungangeni manzi. Amalahle asebenza njengesigcwalisi esiqinisa uhlaka oluvamise ukwaphuka.