Permafrost is formed when the water that is infiltrated in soil gets frozen along with the soil due to temperatures going below zero degrees in temperatures.
Explanation:
The house will cause the ice of the permafrost to melt in two ways. Firstly the heat from the building will be conducted by the local ground causing the temperatures to rise and melt the ice. In addition, the pressure of the house on the local ground also lowers the melting point of water hence melting the ice.
When the permafrost melts, the water drains from the soil leaving the ground very porous due to the spaces in the soil that the ice occupied. The ground will, therefore, cave in slowly under the pressure of the house shifting the foundation and causing the walls to crack.
