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The temperature inside such a house may easily rise to 70° or 80° while the stove is in operation. If this results in undue softening of the roof, it is only necessary to go outside and, with a ski, scrape down the thickness of the structure until the heat can be dispersed. If, on the other hand, hoarfrost begins to form and drop off the roof inside, it means that the structure is not thick enough to give adequate protection from the weather. The remedy here is to pile loose snow on the outside. Cooling may also be secured by increasing the number or size of vent holes. In thawing weather igloos cannot be used because the blocks will shrink, causing the roof to sag and eventually to collapse. |
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