VULNERABILITY TO CONDENSE OF THERMAL REHABILITATION BUILDINGS

The thermal rehabilitation of existing buildings, an essential component of Sustainable Architecture, aims at reducing energy consumption for building operation and ensuring a healthy and comfortable indoor environment. This involves the reduction of risk of condensation on both the surface and inside the closing elements. However, there are reported situations of vulnerabilities to surface and interstitial condense of certain areas of rehabilitated building envelope, when a combination of favorable conditions for producing the phenomenon is determined. These conditions may be caused by deficiencies in the design or in application of additional insulation measures and / or improper operation, consisting mainly in the mismatch between the production of vapor and the ventilation rate. Exterior climate conditions, specific for the continental temperate area, could have an important contribution. This paper aims to identify the generating situations of condense vulnerability of rehabilitated buildings, taking into account different scenarios for using. Measures for vulnerability reduction are proposed and analyzed, aiming the optimization of constructive solutions and also of the operating system.