GREEN ROOFS: ANALYSIS OF THE THERMAL PERFORMANCE OF AN EXTENSIVE SYSTEM COMPARED TO A ROOF WITH CERAMIC TILE IN THE CITY OF PALMAS-TO

Abstract

This study compared the thermal performance of green roofs and ceramic tiles, evaluating thermal transmittance and thermal comfort in accordance with the ABNT NBR 15.575-5:2013 and ABNT NBR 15.575-1:2013 standards. The analysis was carried out using the simplified procedure, with the calculation of thermal transmittance in both roofs, and the on-site measurement procedure, which involved collecting the air temperature in the prototypes for three consecutive days. In addition to the methods provided for by the standard, the parameters of relative humidity and the temperature of the black globe were also analyzed, through the interpretation of graphs with the data collected during the measurement period. The results showed that the green roof had a lower thermal transmittance compared to the ceramic tile, indicating better thermal insulation. However, both coverages did not meet the minimum performance requirements of the standard. The in-situ measurement revealed that, although the green roof provides greater thermal comfort, no model was able to guarantee internal temperatures lower than external temperatures during the entire collection period. The research suggests that optimizing materials, such as increasing the thickness of components such as plywood, could improve results and meet the criteria required by the standard.