2012 12-03 english presentation green roofs
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Transcript of 2012 12-03 english presentation green roofs
Instituto Superior de Engenharia de Lisboa – English 2012/2013
2012-12-03 English Presentation 1
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Roofs Roofs Roofs Roofs
Instituto Superior de Engenharia de Lisboa – English 2012/2013
2012-12-03 English Presentation 2
What is a green roof ?
A green roof or sometimes called living roof is a roof of a
building that is partially or completely covered with vegetation
and a growing medium, planted over a waterproofing membrane.
It may also include additional layers such as a root barrier and
drainage and irrigation systems.
There are two types of green roofs:
Intensive roofs, which are thicker and can support a wider variety
of plants but are heavier and require more maintenance.
Extensive roofs, which are covered in a light layer of vegetation
Hotel �ew Providence Wharf, London
Instituto Superior de Engenharia de Lisboa – English 2012/2013
2012-12-03 English Presentation 3
Roof Gardens, Expo Zaragoza
Olive Tree Garden
(Jardim das Oliveiras),
CCB Lisbon
Instituto Superior de Engenharia de Lisboa – English 2012/2013
2012-12-03 English Presentation 4
Replicating Nature on roofs…
Wastewater treatment plant, Alcântara - Lisbon
Instituto Superior de Engenharia de Lisboa – English 2012/2013
2012-12-03 English Presentation 5
Why have a Green Roof ?
Beyond their attractive visual nature, Green Roofs offer many
undisputable benefits, both ecological and economical, provided
they are built in the right way.
Instituto Superior de Engenharia de Lisboa – English 2012/2013
2012-12-03 English Presentation 6
Some disadvantages…
The main disadvantage of green roofs is the higher initial cost of
the building structure, waterproofing systems and root barriers.
The additional mass of the soil substrate and retained water can
require additional structural support.
Some types of green roofs do have more demanding structural
standards especially in seismic regions of the world.
Some existing buildings cannot be retrofitted with certain kinds of
green roof because of the weight load of the substrate and
vegetation exceeds permitted static loading.
Depending on what kind of green roof it is, the maintenance costs
could be higher, but some types of green roof have little or no
ongoing cost.
Some kinds of green roofs also place higher demands on the
waterproofing system of the structure, both because water is
retained on the roof and due to the possibility of roots penetrating
the waterproof membrane.
California Academy of Science, USA
Instituto Superior de Engenharia de Lisboa – English 2012/2013
2012-12-03 English Presentation 7
For all kinds of roofs…