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In this paper, the authors made attempt to analyse the influence of moisture in the external wall of a building on the
distribution of the temperature field, using numerical and experimental methods. Studies were carried out in the
places of heat leakage occurring in structural joints of a single-family residential building, built in the traditional
technology. In this study, the thermal bridge parameters were calculated by determining the values of thermal and
moisture identifiers. For this purpose, two three-dimensional models of the building partition were designed based
on an existing structure, and the boundary conditions for simulations were determined. The obtained heat flux values
made it possible to perform quantitative calculations of heat flux distributions and temperatures of construction joints
within the thermal bridge occurrence area. Moreover, the accuracy of the final temperatures obtained after combining
the mathematical models with the values determined from thermograms was evaluated. In order to validate the results
of numerical simulation, a test model was used taking into account the parameters specified in PL-EN 15026. The
analysis aimed to present the handiness of using the simulation at the stage of planning the design and thermomod-
ernisation of buildings in the places particularly exposed to adverse terrain and atmospheric conditions.
