External thermal insulation is a modern method of energy upgrading for buildings, applied to the outer shell of the walls. It is the most effective insulation method and protects the building from moisture and damage, thereby increasing its lifespan. At the same time, the façade of the property is renovated, and consequently, the property’s value increases significantly. Climatic conditions in the area where the building is located also play an important role in the final selection of the most suitable external insulation system. In any case, an effective and high-quality external thermal insulation system can achieve energy savings of up to — and in some cases exceeding — 50%.