External Thermal Insulation Composite Systems (ETICS) have been extensively applied for increasing the thermal insulation in both new and retrofitted constructions. These systems, however, can present several anomalies, due to their constant exposure to weathering agents and anthropic factors, which can lead to cracks and stains. The application of protective coatings aims at minimizing these anomalies and increasing the durability of ETICS. In fact, a proper maintenance of these systems is necessary to achieve a durable service life. In this paper, we study the effect of multifunctional coatings when applied on ETICS. Commercially available paints, with improved (i.e. hydrophobic, antibacterial and self-cleaning) properties were selected and compared, evaluating the effect of these treatments on the moisture transport properties of ETICS.