THERMAL PERFORMANCE OF AN EXTENSIVE GREEN ROOF UNDER SEMI-ARID CONDITIONS IN CENTRAL ARGENTINA

LELIA IMHOF; SUAREZ E; NATALIA CÁCERES; FEDERICO OMAR ROBBIATI; BROILO A; PELLIZARI L; SUAREZ MARIO; HICK EMANUEL; EVANGELINA MATOFF; LEONARDO GALETTO

Journal of Green Building

College Publishing

Año: 2021

1552-6100

Extensive green roofs improve the provision of ecosystem services in urban environments, particularly in semiarid regions. The aim of this paper is to compare the thermal performance during six months between two rooms, one with a green roof and the other with a conventional roof, in Córdoba (Argentina). The room with green (planting) roof showed lower inside surface temperaturesince the beginning of the essay than the control room (between 5-6°C of difference). During selected period the indicators such as temperature amplitude (the difference between the maximum and the average temperature) and the anti-interference characteristics of the layers to the outdoor air temperature are evidencing a better performance for the green roof compared to the conventionalroof. The pattern of a better performance was consistent across the essay for the green roof, characterized by a higher cooling and warming of the roof surface during the day and night, respectively. Green roof was more effective blocking upward heat flux during daytime and suppressing heat loss during the night. Evaporation, conductive flux and climatic conditions seem todominate the thermal performance of green roofs in areas with semiarid climate conditions.