Green roof evaluation: A holistic ‘long life, loose fit, low energy’ approach

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)
4 Downloads (Pure)

Abstract

Green roofs have potential to improve the social and environmental performance of detached housing in Australia, yet often they are overlooked due to prohibitive capital cost and a range of other perceptions that are difficult to quantify. A classic evaluation problem is invoked that must balance short and long term benefits. Using two distinct designs of the same floor area, green roof and traditional housing prototypes are analysed to determine the relative ‘breakeven’ point when long-term benefits become feasible. It is discovered that green roofs are unlikely to be viable in their own right, but when coupled with an overall design strategy of long life (durability), loose fit (adaptability) and low energy (sustainability) they can deliver least cost (affordability) over time as well as unlock valuable social and environmental rewards. This outcome can be realised within 25% of a home’s expected design life of at least one hundred years. The results demonstrate that residential green roofs, when integrated as part of a holistic approach, can be both individually and collectively justified on key economic, social and environmental criteria, and are therefore able to claim a valuable contribution towards wider sustainable development goals.

Original languageEnglish
Pages (from-to)76-94
Number of pages19
JournalConstruction Economics and Building
Volume15
Issue number4
DOIs
Publication statusPublished - 2015

Fingerprint

Roofs
Sustainable development
Costs
Durability
Economics
Energy
Evaluation
Adaptability
Affordability
Holistic approach
Environmental economics
Integrated
Social performance
Prototype
Environmental performance
Capital cost
Reward
Sustainability

Cite this

@article{50a0387da73e4ebca03152b8da28d115,
title = "Green roof evaluation: A holistic ‘long life, loose fit, low energy’ approach",
abstract = "Green roofs have potential to improve the social and environmental performance of detached housing in Australia, yet often they are overlooked due to prohibitive capital cost and a range of other perceptions that are difficult to quantify. A classic evaluation problem is invoked that must balance short and long term benefits. Using two distinct designs of the same floor area, green roof and traditional housing prototypes are analysed to determine the relative ‘breakeven’ point when long-term benefits become feasible. It is discovered that green roofs are unlikely to be viable in their own right, but when coupled with an overall design strategy of long life (durability), loose fit (adaptability) and low energy (sustainability) they can deliver least cost (affordability) over time as well as unlock valuable social and environmental rewards. This outcome can be realised within 25{\%} of a home’s expected design life of at least one hundred years. The results demonstrate that residential green roofs, when integrated as part of a holistic approach, can be both individually and collectively justified on key economic, social and environmental criteria, and are therefore able to claim a valuable contribution towards wider sustainable development goals.",
author = "Craig Langston",
year = "2015",
doi = "10.5130/AJCEB.v15i4.4617",
language = "English",
volume = "15",
pages = "76--94",
journal = "Australasian Journal of Construction Economics and Building",
issn = "2204-9029",
publisher = "UTS Press",
number = "4",

}

Green roof evaluation: A holistic ‘long life, loose fit, low energy’ approach. / Langston, Craig.

In: Construction Economics and Building, Vol. 15, No. 4, 2015, p. 76-94.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Green roof evaluation: A holistic ‘long life, loose fit, low energy’ approach

AU - Langston, Craig

PY - 2015

Y1 - 2015

N2 - Green roofs have potential to improve the social and environmental performance of detached housing in Australia, yet often they are overlooked due to prohibitive capital cost and a range of other perceptions that are difficult to quantify. A classic evaluation problem is invoked that must balance short and long term benefits. Using two distinct designs of the same floor area, green roof and traditional housing prototypes are analysed to determine the relative ‘breakeven’ point when long-term benefits become feasible. It is discovered that green roofs are unlikely to be viable in their own right, but when coupled with an overall design strategy of long life (durability), loose fit (adaptability) and low energy (sustainability) they can deliver least cost (affordability) over time as well as unlock valuable social and environmental rewards. This outcome can be realised within 25% of a home’s expected design life of at least one hundred years. The results demonstrate that residential green roofs, when integrated as part of a holistic approach, can be both individually and collectively justified on key economic, social and environmental criteria, and are therefore able to claim a valuable contribution towards wider sustainable development goals.

AB - Green roofs have potential to improve the social and environmental performance of detached housing in Australia, yet often they are overlooked due to prohibitive capital cost and a range of other perceptions that are difficult to quantify. A classic evaluation problem is invoked that must balance short and long term benefits. Using two distinct designs of the same floor area, green roof and traditional housing prototypes are analysed to determine the relative ‘breakeven’ point when long-term benefits become feasible. It is discovered that green roofs are unlikely to be viable in their own right, but when coupled with an overall design strategy of long life (durability), loose fit (adaptability) and low energy (sustainability) they can deliver least cost (affordability) over time as well as unlock valuable social and environmental rewards. This outcome can be realised within 25% of a home’s expected design life of at least one hundred years. The results demonstrate that residential green roofs, when integrated as part of a holistic approach, can be both individually and collectively justified on key economic, social and environmental criteria, and are therefore able to claim a valuable contribution towards wider sustainable development goals.

UR - http://www.scopus.com/inward/record.url?scp=84947939851&partnerID=8YFLogxK

U2 - 10.5130/AJCEB.v15i4.4617

DO - 10.5130/AJCEB.v15i4.4617

M3 - Article

VL - 15

SP - 76

EP - 94

JO - Australasian Journal of Construction Economics and Building

JF - Australasian Journal of Construction Economics and Building

SN - 2204-9029

IS - 4

ER -