Green Roofs - Living Architecture Monitor - Spring 2020 - 4

FEATURE

WHY VERTICAL
FORESTS ARE ON THE
RISE WORLDWIDE
BY OLIVER GILLINGS-PECK

You've heard about green roofs and green walls,
but have you heard of a new green trend on
the condominium development scene known
as vertical forests?

T

he Bosco Verticale project in Milan,
Italy was one of the first and most widely
known residential condominiums to be
designed, constructed, and maintained
to include a living forest on the exterior of
its buildings. A vertical forest is defined as a
sustainable residential building model, encompassing reforestation as key to environmental
regeneration wherein a living forest is built
onto the exterior of the building. At Bosco
Verticale, the two beautiful stunning buildings
host more than 900 trees, 5000 shrubs, and
11,000 perennials on over 96,000 sf of terraces.
Such buildings have incredible appeal for
the potential buyer and can sequester large
amounts of Co2 annually; however, developing
and maintaining a building containing thousands of living organisms must surely have its
drawbacks and challenges. Questions and concerns from both a practical and socioeconomic
perspective include things like:
What are the capital and maintenance costs?
How to overcome installation and maintenance challenges?
What are the environmental benefits?
What is the public perception of vertical
forests?

LIVING ARCHITECTURE MONITOR / SPRING 2020 / 4

Not one vertical forest existed a decade ago
- it was just a concept. Several major cities
and firms were well underway at developing
policies and designs for green roofs and walls
but no single architectural firm had undertaken putting trees on buildings at quite the
same scale as the concept of a vertical forest;
that is not until the Stefano Boeri Architetti
firm proposed the Bosco Verticale project
which started construction in 2009 and finished in 2014. Being the first and only completed vertical forest, Bosco Verticale stands as
an important case study for the development
of other vertical forests around the world. Six
years after its completion, numerous studies
demonstrate that the twin forest buildings are
doing well.
One of the main benefits of vertical forests
is they help mitigate the urban heat island
effect through shading and evapotranspiration thus reducing temperatures around the
building and the surrounding area. The Bosco
Verticale also absorbs 42,000 lbs of Co2 and
produces 41,800 lbs of O2 per year. The
greenery that encompasses the outside of the
building acts as a natural insulator in both
warming and cooling the building by 3°C.
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Green Roofs - Living Architecture Monitor - Spring 2020

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

Table of Contents
Green Roofs - Living Architecture Monitor - Spring 2020 - 1
Green Roofs - Living Architecture Monitor - Spring 2020 - Cover1
Green Roofs - Living Architecture Monitor - Spring 2020 - Cover2
Green Roofs - Living Architecture Monitor - Spring 2020 - TOC
Green Roofs - Living Architecture Monitor - Spring 2020 - A1
Green Roofs - Living Architecture Monitor - Spring 2020 - 1
Green Roofs - Living Architecture Monitor - Spring 2020 - 2
Green Roofs - Living Architecture Monitor - Spring 2020 - Table of Contents
Green Roofs - Living Architecture Monitor - Spring 2020 - 4
Green Roofs - Living Architecture Monitor - Spring 2020 - 5
Green Roofs - Living Architecture Monitor - Spring 2020 - 6
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Green Roofs - Living Architecture Monitor - Spring 2020 - 33
Green Roofs - Living Architecture Monitor - Spring 2020 - 34
Green Roofs - Living Architecture Monitor - Spring 2020 - Cover3
Green Roofs - Living Architecture Monitor - Spring 2020 - Cover4
Green Roofs - Living Architecture Monitor - Spring 2020 - MBR
Green Roofs - Living Architecture Monitor - Spring 2020 - A2
Green Roofs - Living Architecture Monitor - Spring 2020 - A3
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