The accelerated increase in urbanization is generating reductions in green areas and phenomena such as the heat island; for this reason, greening solutions are sought in buildings with the use of the green wall, to mitigate the increase in surface temperature on the facades of single-family homes; the present study evaluates the behavior of surface temperature and relative humidity outside and inside in homes; and the surface temperature and relative humidity in a reinforced masonry green wall façade with concrete blocks using a hydroponic system with the species Nephrolepis exaltata. The results indicate that the exterior surface temperatures and interior relative humidity are higher on average by 5.5 °C and 3.6% than the interior surface temperatures and exterior humidity of the homes; instead, in the green wall prototype, the surface temperature decreases from 8.5 to 7 °C and the r...