Quick Answer
When constructing an igloo, it's essential to avoid using too much snow for the walls and roof, as this can lead to structural instability and collapse. Additionally, building the igloo near a slope or uneven terrain can increase the risk of collapse.
Choosing the Right Snow
For an igloo, you’ll want to focus on constructing walls with a thickness of about 1-2 feet (30-60 cm) using snow with a moisture content of around 10-15%. Avoid using powdery or too-wet snow, as this can compromise the structural integrity of the igloo. Opt for snow that’s sticky and can hold its shape well.
Avoiding Hazardous Locations
When selecting a site for your igloo, steer clear of areas prone to heavy wind or snowfall. Also, avoid building near slopes or uneven terrain, as this can increase the risk of collapse. Ideally, choose a spot with a relatively flat surface and minimal exposure to wind. A good rule of thumb is to look for a spot with a slope of less than 10 degrees.
Building Techniques to Avoid
One common mistake when building an igloo is to start constructing the walls too high, which can lead to an unstable structure. Instead, start with a low dome shape and gradually add layers of snow, increasing the height as you go. This will help distribute the weight more evenly and reduce the risk of collapse. Additionally, avoid using too much snow on the roof, as this can lead to a heavy, unstable structure.
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