The main objective of this project work is to give an overview of special features in frozen ground engineering. Dealing with frozen ground in soil mechanics, the constituents and the properties in the soil vary with the presence of ice. This work will give information of additional aspects to consider when regarding frozen ground or engineering problems in cold regions. Another objective is to investigate thaw depth and its progress with time. An actual case of a building that showed cracks because of unexpected settlements provided the task to calculate the thaw depth and review the reasons for the damages. The building was constructed during the summer of 1998. An insulation layer placed on the ground surface prior to construction is thought to be responsible for the restriction of heat flow in the soil and impedes thaw progress in an adequate time period before construction. In addition, the thickness of the insulation layer made of slag is varying; therefore, different thickness of the layer is included in the calculations. The settlements found were thought to be due to thaw that occurred during and after the construction of the building. An analysis of temperatures and thermal properties of the soil provide a basis for the final calculation of the thaw front advance. This analysis of temperatures includes freezing and thawing index calculations. In order to do this, the Swedish Meteorological Institute, SMHI, provided daily mean temperatures. Basic soil mechanics and thermal properties are regarded in calculations of the thermal properties responsible for the heat flow in soils, such as the thermal conductivity, the volumetric heat capacity, etc. The calculations are carried out in two different ways. First, the thaw front progress is calculated by hand using Stefan's formula, then an analysis based on the finite element program Temp/W is carried out to compare the results.