 Time and effort are required to hollow out the center of a Quinzhee, though these can be reduced by piling snow around a hollow structure, such as a trap-covered pile of packs or a makeshift tent or dome.Melting and refreezing the inner side of the quinzhee can strengthen it, as it does an igloo; this can be done rapidly with a lamp or candle, but body heat is also adequate.Allowing the interior temperature to rise above freezing point risks weakening the shelter significantly, especially if the outside air temperature is near freezing.