Effect of the drainage layer on the thermal performance of green roofs in Curitiba-PR: comparative study with test cells

Journal: Journal of Building Technology DOI: 10.32629/jbt.v8i1.5221

Clarisse S.A. Di Núbila1, Eduardo L. Krüger1, Mariana G. Noya2, Eduardo M. González Cruz1

1. Federal University of Technology–Paraná (UTFPR)
2. Pontifical Catholic University of Paraná (PUC-PR)

Abstract

The present work aims to evaluate the effect of the material of the draining layer that constitutes a green roof system on its thermal behavior, considering the climate of Curitiba, by means of a comparative study using test cells. In order to do this, roof prototypes were constructed, which vary in terms of the material that constitutes the drainage layer: expanded clay, and two types of industrialized drainage blankets, one of which also has the function of storing water. This study analyzed the thermal performance of the green roof systems in terms of characteristic temperatures,time lag and decrement factor,resulting from the monitoring carried out in one week, in the end of summer (mar/2020). In the monitoring period, there was a slightly higher thermal performance of the green roof system whose drainage layer was composed of expanded clay.

Keywords

green roof; drainage layer; thermal performance; test cells

References

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