Assessment of the environmental loads of green façades in buildings: a comparison with un-vegetated exterior walls.

Journal of Environmental Management
Ileana BlancoGiovanni Russo

Abstract

Green vertical systems have advantages in terms of building energy performance, but their environmental impact should be assessed in comparison to un-vegetated constructive systems. The aim of this paper was to evaluate the environmental loads of a green façade, which was compared to other building exterior wall systems. A Life Cycle Analysis approach was used to compare the green façade with constructive solutions commonly applied for enhancing the thermal insulation properties of the building exterior walls. The green façade and the other constructive solutions were characterised by an equivalent thermal behaviour. A green façade system prototype, realised with vegetation climbing on a steel frame, was used for the study. The comparison was carried out with exterior walls using insulation materials as expanded polystyrene, expanded cork and wood fibre. A double wall with an un-ventilated air gap was used as well. On average, the best environmental performance was recorded for the wall using cork as insulating material and for the double wall. The results highlighted the environmental criticalities of the green façade as the system having an environmental load among the most burdensome. Different scenarios of green façade with...Continue Reading

References

Jul 22, 2006·Environmental Science & Technology·Susana SaizKim Pressnail
Nov 13, 2007·The Science of the Total Environment·Anneke Wegener SleeswijkMark A J Huijbregts
Feb 11, 2018·The Science of the Total Environment·Maria MansoCarlos Afonso Teixeira
Nov 11, 2019·Journal of Environmental Management·V Oquendo-Di CosolaJ Bacenetti

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