Life cycle assessment of layers of green roofs

Sanaz Bozorg Chenani (Corresponding Author), Susanna Lehvävirta, Tarja Häkkinen

Research output: Contribution to journalArticleScientificpeer-review

27 Citations (Scopus)

Abstract

Recent years have seen an increase in the amount of green roofs in urban areas across the world. The research to date has tended to focus on the general advantages of such roofs while less attention has been paid to environmental impacts of the layers used in the construction of green roofs. In this paper, the environmental performance of two complete lightweight green roof systems were analyzed with the aim of determining the potential environmental impact of the different layers of the systems. The results show that among the materials we analyzed, the water retention, drainage and substrate layers contained the components that had the greatest negative environmental impact. More specifically, our results show that when the required performance is not impaired 1) Rockwool, virgin HIPS and expanded clay should be avoided in order to produce environmentally responsible roof systems; 2) simple roof systems may be recommendable whenever feasible and 3) recycled and local materials are better than virgin and those requiring long distance transport; and 4) the use of compost on the roofs may be recommendable if taking into account that using organic waste in landfill is a worse scenario than composting it.
Original languageEnglish
Pages (from-to)153-162
JournalJournal of Cleaner Production
Volume90
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

Fingerprint

Roofs
roof
Life cycle
life cycle
Environmental impact
environmental impact
Composting
water retention
Life cycle assessment
Land fill
composting
compost
Drainage
landfill
Clay
urban area
drainage
substrate
clay
Substrates

Keywords

  • green roof layers
  • sedum roof
  • meadow roof
  • environmental impact
  • vegetative roofs
  • LCA

Cite this

Chenani, Sanaz Bozorg ; Lehvävirta, Susanna ; Häkkinen, Tarja. / Life cycle assessment of layers of green roofs. In: Journal of Cleaner Production. 2015 ; Vol. 90. pp. 153-162.
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title = "Life cycle assessment of layers of green roofs",
abstract = "Recent years have seen an increase in the amount of green roofs in urban areas across the world. The research to date has tended to focus on the general advantages of such roofs while less attention has been paid to environmental impacts of the layers used in the construction of green roofs. In this paper, the environmental performance of two complete lightweight green roof systems were analyzed with the aim of determining the potential environmental impact of the different layers of the systems. The results show that among the materials we analyzed, the water retention, drainage and substrate layers contained the components that had the greatest negative environmental impact. More specifically, our results show that when the required performance is not impaired 1) Rockwool, virgin HIPS and expanded clay should be avoided in order to produce environmentally responsible roof systems; 2) simple roof systems may be recommendable whenever feasible and 3) recycled and local materials are better than virgin and those requiring long distance transport; and 4) the use of compost on the roofs may be recommendable if taking into account that using organic waste in landfill is a worse scenario than composting it.",
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Life cycle assessment of layers of green roofs. / Chenani, Sanaz Bozorg (Corresponding Author); Lehvävirta, Susanna; Häkkinen, Tarja.

In: Journal of Cleaner Production, Vol. 90, 2015, p. 153-162.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Life cycle assessment of layers of green roofs

AU - Chenani, Sanaz Bozorg

AU - Lehvävirta, Susanna

AU - Häkkinen, Tarja

PY - 2015

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N2 - Recent years have seen an increase in the amount of green roofs in urban areas across the world. The research to date has tended to focus on the general advantages of such roofs while less attention has been paid to environmental impacts of the layers used in the construction of green roofs. In this paper, the environmental performance of two complete lightweight green roof systems were analyzed with the aim of determining the potential environmental impact of the different layers of the systems. The results show that among the materials we analyzed, the water retention, drainage and substrate layers contained the components that had the greatest negative environmental impact. More specifically, our results show that when the required performance is not impaired 1) Rockwool, virgin HIPS and expanded clay should be avoided in order to produce environmentally responsible roof systems; 2) simple roof systems may be recommendable whenever feasible and 3) recycled and local materials are better than virgin and those requiring long distance transport; and 4) the use of compost on the roofs may be recommendable if taking into account that using organic waste in landfill is a worse scenario than composting it.

AB - Recent years have seen an increase in the amount of green roofs in urban areas across the world. The research to date has tended to focus on the general advantages of such roofs while less attention has been paid to environmental impacts of the layers used in the construction of green roofs. In this paper, the environmental performance of two complete lightweight green roof systems were analyzed with the aim of determining the potential environmental impact of the different layers of the systems. The results show that among the materials we analyzed, the water retention, drainage and substrate layers contained the components that had the greatest negative environmental impact. More specifically, our results show that when the required performance is not impaired 1) Rockwool, virgin HIPS and expanded clay should be avoided in order to produce environmentally responsible roof systems; 2) simple roof systems may be recommendable whenever feasible and 3) recycled and local materials are better than virgin and those requiring long distance transport; and 4) the use of compost on the roofs may be recommendable if taking into account that using organic waste in landfill is a worse scenario than composting it.

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KW - sedum roof

KW - meadow roof

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KW - vegetative roofs

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