Appropriate technology to improve the condensation resistance of existing window

The dilapidated windows in old buildings lead to not only energy loss but also condensation, which can cause damages to finish materials and structures, which can adversely affect the residential environment of residents. In the research, in order to prevent the occurrence of condensation, the airtightness performance improvement technology of window(Windbreak) and the thermal insulation performance improvement technology of window(Attached glazing) were selected. Then, these two technologies were applied to real old apartment houses for performance verification. TDR (Temperature Differential Ratio) was calculated by measuring the surface temperature of the window before and after the application of the two technologies, and the quantitative evaluation was performed by comparing the measured values. As a result, the condensation prevention performance was enhanced by about 17.69% result for the installation of the attached glazing and the windbreak. Especially, it was more effective in the lower part of the glazing where condensations mainly occurs.