Green Roofs - Living Architecture Monitor - Summer 2020 - 6

TRENDS

SETTING TARGETS FOR GREEN ROOF
MARKET PENETRATION AND POLICY
EVALUATION: A SCENARIO FOR NYC
BY STEVEN PECK, GRP AND ROHAN LILAUWALA, GRP

Paul Hawken's Drawdown provides a comprehensive model of the 80
top solutions we can take to avert the climate crisis by eliminating
greenhouses gases by 2050. All of the scenarios are considered
economically and technically feasible and have considerable benefits,
independent of their greenhouse gas emission reductions. At #73,
green roofs are listed as a solution that should be deployed at a
large scale around the world.

H

awken and his team outline two scenarios based
upon 9 per cent and 13 per cent adoption of
green roofs on all feasible roofs by 2050. These
targets place green roof market development in
a broader context that can be used to evaluate the effectiveness of public policy in different jurisdictions.
We applied these targets to New York City to
provide a basis for public policy, and the context
for researching the positive impacts of widespread
implementation - for example, measuring the reduction in the urban heat island. This also provides
important context for understanding the costs and
benefits resulting from public and private green roof
investment.
There are approximately 1.74 billion sq. ft. of
roofs in NYC (40,000 acres), with approximately 2.6
million sq. ft. (60 acres) of existing green roof area as
of 2016. For NYC to achieve the targets outlined in
Drawdown by 2050, we have created the following
scenarios:

LIVING ARCHITECTURE MONITOR / SUMMER 2020 / 6

NYC MARKET PENETRATION SCENARIO SUMMARY
9 PER CENT MARKET PENETRATION
* In 2020, 700,000 sq. ft. of green roofs are installed
* This grows at an 11 per cent rate annually, leading to 16 million sq. ft.
installed annually by 2050
* The cumulative total by 2050 is approximately 157 million sq. ft. (3600 acres)
13 PER CENT MARKET PENETRATION
* In 2020, 700,000 sq. ft. of green roof installed
* This grows at a 12.8 per cent rate annually, leading to 26 million sq. ft.
of green roof installed annually by 2050
* The cumulative total by 2050 is approximately 226 million sq. ft. (5200 acres)

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Green Roofs - Living Architecture Monitor - Summer 2020

Table of Contents for the Digital Edition of Green Roofs - Living Architecture Monitor - Summer 2020

Table of Contents
Green Roofs - Living Architecture Monitor - Summer 2020 - IP
Green Roofs - Living Architecture Monitor - Summer 2020 - Cover1
Green Roofs - Living Architecture Monitor - Summer 2020 - Cover2
Green Roofs - Living Architecture Monitor - Summer 2020 - Table of Contents
Green Roofs - Living Architecture Monitor - Summer 2020 - A
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Green Roofs - Living Architecture Monitor - Summer 2020 - Cover3
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Green Roofs - Living Architecture Monitor - Summer 2020 - M1
https://www.nxtbook.com/dawson/greenroofs/lam_2020Winter
https://www.nxtbook.com/dawson/greenroofs/lam_2020Fall
https://www.nxtbook.com/dawson/greenroofs/lam_2020Summer
https://www.nxtbook.com/dawson/greenroofs/lam_2020Spring
https://www.nxtbook.com/dawson/greenroofs/lam_2019Winter
https://www.nxtbook.com/dawson/greenroofs/lam_2019Fall
https://www.nxtbook.com/dawson/greenroofs/lam_2019Summer
https://www.nxtbook.com/dawson/greenroofs/lam_2019Spring
https://www.nxtbook.com/dawson/greenroofs/lam_2018winter
https://www.nxtbook.com/dawson/greenroofs/lam_2018Fall
https://www.nxtbook.com/dawson/greenroofs/lam_2018summer
https://www.nxtbook.com/dawson/greenroofs/lam_2018spring
https://www.nxtbook.com/dawson/greenroofs/lam_2017winter
https://www.nxtbook.com/dawson/greenroofs/lam_2017fall
https://www.nxtbook.com/dawson/greenroofs/lam_2017summer
https://www.nxtbook.com/dawson/greenroofs/lam_2017Spring
https://www.nxtbook.com/dawson/greenroofs/lam_2016winter
https://www.nxtbook.com/dawson/greenroofs/lam_2016fall
https://www.nxtbook.com/dawson/greenroofs/lam_2016summer
https://www.nxtbook.com/dawson/greenroofs/lam_2016spring
https://www.nxtbook.com/dawson/greenroofs/lam_2015Winter
https://www.nxtbook.com/dawson/greenroofs/lam_2015fall
https://www.nxtbook.com/dawson/greenroofs/lam_2015summer
https://www.nxtbook.com/dawson/greenroofs/lam_2015spring
https://www.nxtbook.com/dawson/greenroofs/lam_2014winter
https://www.nxtbook.com/dawson/greenroofs/lam_2014fall
https://www.nxtbook.com/dawson/greenroofs/lam_2014summer
https://www.nxtbook.com/dawson/greenroofs/lam_2014spring
https://www.nxtbook.com/dawson/greenroofs/lam_2013winter
https://www.nxtbook.com/dawson/greenroofs/lam_2013fall
https://www.nxtbook.com/dawson/greenroofs/lam_2013summer
https://www.nxtbook.com/dawson/greenroofs/lam_2013spring
https://www.nxtbook.com/dawson/greenroofs/lam_2012fall
https://www.nxtbook.com/dawson/greenroofs/lam_2012summer
https://www.nxtbook.com/dawson/greenroofs/lam_2012spring
https://www.nxtbook.com/dawson/greenroofs/lam_2012winter
https://www.nxtbook.com/dawson/greenroofs/lam_2011fall
https://www.nxtbook.com/dawson/greenroofs/lam_2011summer
https://www.nxtbook.com/dawson/greenroofs/lam_2011spring
https://www.nxtbook.com/dawson/greenroofs/lam_2011winter
https://www.nxtbook.com/dawson/greenroofs/lam_2010fall
https://www.nxtbook.com/dawson/greenroofs/lam_2010summer
https://www.nxtbook.com/dawson/greenroofs/lam_2010spring
https://www.nxtbook.com/dawson/greenroofs/lam_2010winter
https://www.nxtbook.com/dawson/greenroofs/lam_2009fall
https://www.nxtbook.com/dawson/greenroofs/lam_2009summer
https://www.nxtbook.com/dawson/greenroofs/lam_2009spring
https://www.nxtbook.com/dawson/greenroofs/lam_2009winter
https://www.nxtbook.com/dawson/greenroofs/lam_2008fall
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