Contribution of humidity to the degradation of façade claddings in current buildings

The effects of humidity on façade claddings are analysed based on the statistical results of six similar expert inspection systems focused on adhesive ceramic tiling, natural stone claddings, wall renderings, painted rendered walls, External Thermal Insulation Composite System (ETICS) and architectural concrete surfaces. The analysis compares the association within each system between defects and causes. ETICS have the highest incidence of humidity defects. However, painted rendered walls have more defects associated with humidity causes. Biological colonization and efflorescence are the defects most associated with humidity defects and causes. Incorrect detailing is a main cause of humidity defects.