O enfoque deste Workshop está na demonstração das oportunidades de intervenção que resultam da actual conjuntura no âmbito da CERTIFICAÇÃO ENERGÉTICA E DA QUALIDADE DO AR EM EDIFÍCIOS, dando relevo ao papel das COBERTURAS no desempenho energético-ambiental do edificado. O Workshop é dirigido a todos os decisores que influenciam a qualidade de construção do meio edificado. O tema assume grande relevância, na medida em que as coberturas dos edifícios estão na origem de muitas patologias, que carecem de resolução urgente e, também, porque é nestes espaços que será possível integrar um conjunto importante das oportunidades associadas à sustentabilidade urbana – é o caso da utilização de energias renováveis, do aproveitamento da água da chuva e do contributo para a redução do efeito “Ilha de Calor Urbana”.

1. Future Cities - Cidades Futuras
“Quando alguém cria uma cobertura verde numa casa, não precisa de temer que
a casa se dissolva na paisagem.”
Freidensreich Hundertwasser (1928-2000) – Artista plástico, arquitecto e filósofo austríaco

2. Dusty Gedge
Presidente da
EFB

3. Quente Seca
CIDADE
Poluída
IMPERMEÁVEL
Ar
Água

4. Here is a Title
A bullet point
Another one
And another one
NATURE

5. www.livingroofs.org
www.greenroofconsultancy.com

6. www.livingroofs.org
www.greenroofconsultancy.com

7. 42
7

8. Late June 09 - Health Alert 2
Early July Intense Short rainstorms

9. Alterações Climáticas - UK
Aumento da temperatura no Verão
– em particular nas cidades
Aumento da probabilidade de
ocorrência de precipitações intensas
– fenómenos de inundações
repentinas

10. Áreas urbanas - o problema?
• Falta de solo e de permeabilidade
• Falta da vegetação e de evapotranspiração
• Falta de ecosystems services
„...UK cities will need an increase of at least 10%
green space by 2020 to combat climate
change..University of Manchester 2005

11. Manchester and
Central London -
No room for parks
City of London
No room for trees

12. Polinização Habitat
Ecosystem Services
Regulação do clima / inundações
Protecção e abrigo
Agua potável

17. Intensive green roof

18. Intensive green roof

23. Extensive Semi intensive Intensive
Use Ecological Landscape Garden/Ecological Landscape Garden/Park
Type of vegetation Moss-Herbs-Grasses Grass-Herbs-Shrubs Lawn/Perennials, Shrubs, Trees
Benefit W, T, B W, T, B, A W, T, B, A
Depth of substrate 60 - 200mm 120 - 250mm 150 - 400mm
Weight 60 - 150 kg/m2 120 - 200 kg/m2 180 - 500 kg/m2
Cost Low Periodic High
Input is the defining factor

24. Extensive green roof

25. Extensive green roof

28. Extensive green roof

29. Extensive green roof

30. Extensive green roof

31. Incêndio
Manutenção Infiltrações
Text
Mitos e desafios
Integração
Estabilidade paisagística

32. INCÊNDIO

33. Waterproofing
“Vor sprung durch technik”
•Green roof element protects waterproofing
•From UV, ponding, frost etc
•Can double/triple life of waterproofing

34. Maintenance

40. • Intensive - depends on the vegetation - High
Maintenance/Input
• Extensive - low maintenance - biannual weed
and clear out of outlets perimeters
• Instant green - higher maintenance later
• Slow greening - less maintenance long term
www.livingroofs.org 27
www.greenroofconsultancy.com
37

41. STRUCTURE
Lightweight sedum mat 90kg/m2
Substrate based extensive green roof 120 -150 kg/m2
Paving/shingle 120 kg/m2
Semi intensive 200 -250 kg/m2
Intensive 300 kg/m2

44. Aesthetics
Extensive - adornment or ecology
One of the main concerns during design
process

48. Energia e Água

49. Energia
• Macro and the Micro
• City Scale and Building Scale
• Cities can be 5 degrees warmer than
the country side

50. Energia e Água
• Vegetated landscapes need water
• Plants - „sweat‟ - evapotranspirate
• Evapotranspiration = cooling

51. CIDADES FRESCAS / CIDADES
VERDES

52. Energia e Água
Roehr: 10 % de redução no uso de energia
14% de redução da escorrência superficial

58. Paradise Park
• Brown roof is
approximately 150mm
• Slows heat transfer by 6
hours
• Between noon and 1800
no heat transfer
• 28kW heat gain
• 9.2kW per hour would
normally be used
• Needs no air conditioning
• Saving 3,800kWhrs/year

59. Summer Reductions with Green Roof
4.15Kwh/msq/yr
Z16 25%
Z15 9%
22% Z8 Z13 2%
9% Z7 Z12 1%
2% Z6 Z12
1% Z5 Z11
0% Z4 Z10
5% Z3
Z9
Z2
Z1
Winter Reductions with Green
RoofBetween 2 - 6 Kwh/msq/yr

61. Power and Plants
Evapotranspiration
maintains ambient
temp. close to 25
degrees C

62. ÁGUA

63. Rainfall Harvesting
Toilet reuse Irrigation
Water
Run off Volume Rate of run off
+
Stormwater Attenuation

64. Water Retention
TYPE OF DEPTH [MM] VEGETATION WATER RETENTION
GREEN ANNUAL AVERAGE %
ROOF
Extensive 20-40 MOSS/SEDUM 40
40-60 SEDUM/MOSS 45
60-100 SEDUM/MOSS/HERBS 50
100-150 SEDUM/HERBS/GRASS 55
150-200 GRASS/HERBS 60
Intensive 200 - 250 LAWNS/SHRUBS 60
250 - 500 LAWNS/SHRUBS 70
<500 LAWNS/SHRUBS/TREES <90

65. Rainfall Attentuation
Roofs are source -green roofs a
source control mechanism
In practice there is very little runoff for
many rainfall events
A lot of the water that falls on the roof
is removed by evaporation and
transpiration from plants
Runoff volumes and rates are reduced
In Germany green roofs are important
part of zero discharge sites

67. Rainfall Harvesting
 Can use water from roofs as grey
water
 Some commercial substrates have
nutrients which leads to
discolouration of water
 Discoloration disappears after few
years once vegetation established
 If are going harvest „no‟ nutrient
substrate can be used
 POTSDAMMER PLATZ

75. Drawn by: Kevin Perry

76. Drawn by: Kevin Perry

85. Nature

86. Black redstart

87. Rare pollinators need substrates as
well as plants

91. 98
91

94. New London Plan
• The Mayor will and the boroughs should expect all major developments to in
corporate living roofs and walls, where feasible and reflect this in Local Development
Framework policies. It is expected that this will include roof and wall
• planting that delivers as many of these objectives as possible:
• Accessible roof space
• Adapting and mitigating for climate change
• Sustainable urban drainage
• Enhancing biodiversity
• Improved appearance
• Boroughs should also encourage the use of living roofs in smaller developments
and extensions where the opportunity arises

96. Area of green roofs = 326,682m2/3.5 million ft2
Hyde Park/Kensington gardens = 250,000m2
Up to 2004 = 76,682m2 /825,400ft2
2004 -2009 = 326,682m2/3 million ft2
Text
Total greater than 500,000m2

97. Existing roofs in the City
10 million m2 potentially could
be greened
There is more to do!

98. OBRIGADO
dusty@dustygedge.co.uk
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