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Abstract
Green envelopes are a means for vegetation to become an integral part of the building and its systems such as the passive cooling. However, the dynamics that sustain a good thermal performance of these envelopes depend on many variables. This article aimed to identify, through the systematic review of recent literature about the topic, the thermal behavior of internal built environments under the influence of green envelopes and which are the possible performance variables according to its features. The analyzed papers show that the temperature reduction of indoor spaces is significant, being more pronounced in the case of green walls. The thermal performance of green envelopes depends on variables such as the vegetation type, leaf density, substrate’s composition, etc., highlighting the climatic features despite the fact that most studies focus on results from other variables. It was also possible to verify weak spots of the current knowledge, like the gaps regarding the weight of the substrate’s humidity in green roofs’ cooling and the lack of investigations that compare the green roof’s performance with ceramic tile or fibro cement roofs. The analysis of the variables identified that these exert multifaceted relations between themselves, which made evident that settling hierarchies between these are neither possible nor prudent. The study of the coherence between the variables is more important than determining its hierarchy, as well as this action, must precede the definition of characteristics of a given green envelope to be installed in a specific place.
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