The Qualities of the Snow
Snow is very versatile material. Sometimes it can be very hard, but it
can also be very gently material. Temperature has a great effect on the
properties of the snow. When temperature is over 0 celsius degrees snow
is very wet and heavy, but it has excellent adhesion force. 
Figure presents the value of internal adhesion force of snow in various temperatures. As we can see, snow is easiest to handle, when temperature is a little bit over 0 degrees.
When temperature is below zero degrees, snow is very light and fine material. All moisture has frozen and snow is almost lighter than air. Snow is also very dry now and it's impossible to form any constructions out of snow with traditional methods.
Freshly fallen snow is maybe the finest material in the world, but it easily turns to hard and thick material. When directing pressure to snow, it becomes excellent building material. Compressed snow can be compared to light concrete and ice to concrete.
Snow has firmness qualities when it's density is over 400kg/m3. Snow is still weaker than ice, but snow has better workability and it insulates heat better.
