Are There Risks Associated with Icicles on Igloo Roofs?

Melting and Structural Instability

Icicles hanging from an igloo roof can pose a significant risk if they start to melt. As the temperature rises, the icicles will begin to drip water, which can seep through the snow walls and accumulate at the base of the structure. If the water level becomes too high, it can cause the igloo to collapse, particularly if the snow walls are not well-compacted or if the entrance tunnel is not properly built.

Prevention and Maintenance

To mitigate this risk, it’s essential to monitor the icicles and remove them as soon as they start to form. This can be done by using an ice axe or a small pick to gently pry the icicles away from the roof. Alternatively, you can build a snow shield or a small wall around the entrance to direct the melting snow away from the structure. It’s also crucial to ensure that the igloo is built on a stable surface and that the snow walls are compacted firmly to prevent collapse.

Emergency Procedures

In the event of a sudden collapse, it’s essential to prioritize your safety above all else. If you’re trapped inside the igloo, try to remain calm and wait for the snow to settle. If you can safely exit the igloo, do so slowly and carefully, avoiding any further collapse. If you’re unable to escape, create a small air pocket by digging into the snow with your hands or a tool, and wait for rescue.