Análise do telhado verde em relação ao telhado convencional quanto ao conforto térmico e retenção de água pluvia

Abstract

The world’s population has been gown in the last years, consequently, there is an increase of constructions in the cities, characterizing the process of world’s urbanization through the changings of views and environmental conditions in the urban areas. Against this issue, professionals of the environmental area search for new technologies and alternatives to minimize the impacts of this urbanization process. The green roofs are a viable alternative to the rainwater management in urban areas. The objective was analyses the green roof comparing with a conventional roof, about their thermic comfort and rainwater retention. The methodology was based on the construction of two brick’s prototypes, one of them with a conventional roof and the other one with a green semi-extensive roof. From these two prototypes, it was analyzed the temperature variation and rainwater quantifying. The collected data were compared between the two structures. It was verified that, comparing to the conventional roof, the green roof showed variations of 2 ºC, containing higher temperatures on the colder days and lower temperatures on the hotter days. It was possible to reduce, as an average, 50% of the volumes superficially drained by the green roof, besides to promote the delay in the beginning of the superficial drain. It is notable that the green roof is an important ally to minimize the excess of rainwater drain. The results demonstrate the efficiency of the green roof in the control to thermic comfort of the environment and reinforce the necessity of incentives to its use in urban centrals, considering the necessities of sustainable alternatives on the urban constructions.