EV09 GREEN ROOFS<\/h2><\/div><\/p>\nVegetation with a growing medium, planted in building roofs<\/h4>\n
<\/div><\/div>[\/vc_column_inner][vc_column_inner width=”1\/3″][vc_single_image image=”24936″ img_size=”medium” alignment=”right”][\/vc_column_inner][\/vc_row_inner][vc_empty_space][vc_text_separator title=”” color=”custom” border_width=”4″ accent_color=”#fae699″][vc_column_text]Aim<\/strong><\/p>\nIncrease the thermal performance of the building roof with a green layer able to counteract polluting due to its CO2 retention capacity.<\/p>\n
Why?<\/strong><\/p>\nThis strategy allows rainwater retention, improve its quality and allows to reuse it in gray reuse systems. Require minimal maintenance and low water requirements and affects in different parameters that deal with sustainable criteria:
\n\u25ba Biodiversity: Green roofs create natural urban habitat. Even in highrise urban settings green roofs can attract beneficial insects, birds, bees and butterflies. Rooftop greenery complements wild areas by providing stepping stones for songbirds, migratory birds and other wildlife facing shortages of natural habitat.
\n\u25ba Energy efficiency: Improves the thermal and acoustic insulation of the building, and leads to cost savings in heating or cooling systems. In winter, for a 0\u00b0C air temperature, the surface layer of the roof with conventional materials reaches 0.2\u00b0C while laying a green roof system stands to 4.7\u00b0C. In summer, for 18.2\u00b0C air temperature, conventional surface
\ncan increase to 32\u00b0C as green roof can protect and reduce it to 17.1\u00b0C. (A green roof policy guidance paper for Dublin, 2008)
\n\u25ba Water management: The green roofs surfaces can be completed with a treatment process system that can be also applied for the grey water from the building, allowing the storage and recycling for new uses, closing the water cycle.
\n\u25ba Rainwater retention: retention affects at least 40% of water, delaying draining depending on the slope and thickness of the substrate. As an example, a 12cm layer delays up to 12 hours the evacuation of the stored water during a rain event and continues slowing down the process for about 21 hours.
\n\u25ba Social effects: The green roofs can be used in agricultural production and, therefore, bring community activities and relations among the inhabitants within the buildings and contribute to the approach of the productive processes to the citizens.
\n\u25ba Compost: Green roofs developments raise the city areas suitable for compost use when a cycled system is operating in the inmediate surroundings of the buildings.
\n\u25ba Climate change mitigation: Green roof surfaces help mitigate CO2 emissions by fixing this gas through the photosynthetic process. The average catch is 50g CO2 \/ m2 \/ year depending on the species and substrate thickness.
\n\u25baAir quality. The green roofs contribute to the mitigation of the heat island phenomenon due to the plants capacity as an efficient temperature buffer.<\/p>\n
How?<\/strong><\/p>\nThere ared types of green roofs systems:
\n– Intensive: parks and gardens including Urban Agriculture.
\n– Semi-intensive: garden green roofs.
\n– Extensive: natural low maintenance green roofs
\n– Blue-green roofs: that combing green roof and blue roof technologies to maximise water storage.
\n– Biosolar green roofs: where solar energy and green roofs are combined to provide renewable energy and deliver biodiversity.<\/p>\n
The support features leads to the species that can be used: from small species such as Sedum, in the extensive systems, with a substrate thickness up to 10 cm, to bushes, in semi-intensive coverings of thicknesses over 10 cm, and even larger species such as trees and shrubs in the intensive cases. Under the substrate there’s a draining\/retention layer, which maintains a certain degree of humidity.
\nIn either cases, anti-root protection should be used. In conventional solutions, any kind of insulation can be used with no more limitation than compressive resistance higher than 2 Kp \/ cm\u00b2. In the inverted roof solutions, in which the insulation is located above the waterproof layer, the thermal insulation to be used must have a low absorption of water, so the indicated materials are extruded polystyrene (XPS) and cellular glass (CG).[\/vc_column_text][vc_column_text]![\"\"](\"http:\/\/www.lugobiodinamico.eu\/catalogo\/wp-content\/uploads\/2021\/03\/diagrama-comparativo-efecto-termico.png\")
<\/em><\/p>\nThermal effect of the green roof on the building envelope<\/em>[\/vc_column_text][vc_column_text]![\"\"](\"http:\/\/www.lugobiodinamico.eu\/catalogo\/wp-content\/uploads\/2021\/02\/14824-1.png\")
Extensive green roof with isolation layer in inverted situation.
\n<\/em>[\/vc_column_text][vc_column_text]![\"\"](\"http:\/\/www.lugobiodinamico.eu\/catalogo\/wp-content\/uploads\/2021\/02\/14432.png\")
<\/em><\/p>\nWalter Reed Community Center. Arlington.
\n<\/em>[\/vc_column_text][vc_column_text]![\"\"](\"http:\/\/www.lugobiodinamico.eu\/catalogo\/wp-content\/uploads\/2021\/02\/Green_Roof_at_Vendee_Historial_les_Lucs-1.jpg\")
Vend\u00e9e Historial, les Lucs.
\n<\/em>[\/vc_column_text][\/vc_column][vc_column width=”1\/3″ css=”.vc_custom_1614095927249{background-color: #fdfae4 !important;}”][vc_text_separator title=”BUILDING SCALE INTERVENTION” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_single_image image=”24535″ img_size=”full” alignment=”center”][vc_text_separator title=”ISSUES AFFECTED” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_gallery type=”image_grid” images=”23887,23899,23901,23892,23904,23906,23902,23894,23908,23891,23888,23896″ onclick=”custom_link” custom_links=”https:\/\/www.saulverez.com,https:\/\/www.concellodelugo.com” img_size=”52×52″][vc_text_separator title=”SUITABLE TO BE COMBINED WITH OTHER SOLUTIONS” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_gallery type=”image_grid” images=”25546,25556″ onclick=”custom_link” img_size=”150×55″ custom_links=”http:\/\/www.lugobiodinamico.eu\/catalogo\/en\/proyectos\/ag02-water-collection-and-storage-in-buildings\/,http:\/\/www.lugobiodinamico.eu\/catalogo\/en\/proyectos\/ec01-local-community-gardens-urban-agriculture\/”][vc_text_separator title=”MEASURE ELEMENTS” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]Indicator<\/strong>
\n(I1) CO2 Capture (CaCO2)
\n(I2) % of green roofs<\/p>\nUnit<\/strong>
\n(I1) g CO2\/year
\n(I2) %<\/p>\nMinimum goal<\/strong>
\n(I1) 5 g CO2\/m\u00b2 of roof
\n(I2) 10% of roof
\nDesirable goal<\/strong>
\n(I1) 15 g CO2\/m\u00b2 of roof
\n(I2) 30% of roof<\/p>\nMeasure method \/ Formula<\/strong>
\n\u0394g CO2 = A x B x C
\nA: % green roof surface
\nB: total roof in the area involved
\nC: Capture capacity CO2\/m2 (depends on the plant species)
\nTo consider the roof as effective, the minimum value for the caputure
\ncapacity should be 20g CO2 \/ m2 of roof \/ year[\/vc_column_text][vc_text_separator title=”PLANNING LEVEL” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]Development plan
\nBuilding construction project[\/vc_column_text][vc_text_separator title=”people INVOLVED” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]Design team
\nAdministration technicians
\nDevelopers
\nOwners[\/vc_column_text][vc_text_separator title=”POSIBLE ACTIONS DEVELOPED BY THE ADMINISTRATION” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]\u2022 Gather a roof index suitable for this strategy through direct observation or geographic analysis on available cartography.
\n\u2022 Social and \/ or economic bonuses to promote this solution.
\n\u2022 Rewriting of the building regulations to allow this kind of roofs.[\/vc_column_text][vc_text_separator title=”What should we consider for its implementation?” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]The building technical conditions:
\n\u2022 The building typology, property issues or regulations conditions in terms of heritage or security.
\nPlants characteristics:
\n\u2022 Climate conditions. Consider local species as first option.
\n\u2022 Fertilization and irrigation maintenance.[\/vc_column_text][vc_text_separator title=”EXAMPLES” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]Research on an extensive green roof system adapted
\nto Galicia ![\"\"](\"http:\/\/www.lugobiodinamico.eu\/catalogo\/wp-content\/uploads\/2019\/02\/Enlace-web-150x150.png\")
<\/p>\nScandinavian Green Roof Institute \u00a0<\/a><\/p>\n
Vegetation with a growing medium, planted in building roofs<\/h4>\n
<\/div><\/div>[\/vc_column_inner][vc_column_inner width=”1\/3″][vc_single_image image=”24936″ img_size=”medium” alignment=”right”][\/vc_column_inner][\/vc_row_inner][vc_empty_space][vc_text_separator title=”” color=”custom” border_width=”4″ accent_color=”#fae699″][vc_column_text]Aim<\/strong><\/p>\n Increase the thermal performance of the building roof with a green layer able to counteract polluting due to its CO2 retention capacity.<\/p>\n Why?<\/strong><\/p>\n This strategy allows rainwater retention, improve its quality and allows to reuse it in gray reuse systems. Require minimal maintenance and low water requirements and affects in different parameters that deal with sustainable criteria: How?<\/strong><\/p>\n There ared types of green roofs systems: The support features leads to the species that can be used: from small species such as Sedum, in the extensive systems, with a substrate thickness up to 10 cm, to bushes, in semi-intensive coverings of thicknesses over 10 cm, and even larger species such as trees and shrubs in the intensive cases. Under the substrate there’s a draining\/retention layer, which maintains a certain degree of humidity. Thermal effect of the green roof on the building envelope<\/em>[\/vc_column_text][vc_column_text] Walter Reed Community Center. Arlington. Unit<\/strong> Minimum goal<\/strong> Measure method \/ Formula<\/strong> Scandinavian Green Roof Institute \u00a0
\n\u25ba Biodiversity: Green roofs create natural urban habitat. Even in highrise urban settings green roofs can attract beneficial insects, birds, bees and butterflies. Rooftop greenery complements wild areas by providing stepping stones for songbirds, migratory birds and other wildlife facing shortages of natural habitat.
\n\u25ba Energy efficiency: Improves the thermal and acoustic insulation of the building, and leads to cost savings in heating or cooling systems. In winter, for a 0\u00b0C air temperature, the surface layer of the roof with conventional materials reaches 0.2\u00b0C while laying a green roof system stands to 4.7\u00b0C. In summer, for 18.2\u00b0C air temperature, conventional surface
\ncan increase to 32\u00b0C as green roof can protect and reduce it to 17.1\u00b0C. (A green roof policy guidance paper for Dublin, 2008)
\n\u25ba Water management: The green roofs surfaces can be completed with a treatment process system that can be also applied for the grey water from the building, allowing the storage and recycling for new uses, closing the water cycle.
\n\u25ba Rainwater retention: retention affects at least 40% of water, delaying draining depending on the slope and thickness of the substrate. As an example, a 12cm layer delays up to 12 hours the evacuation of the stored water during a rain event and continues slowing down the process for about 21 hours.
\n\u25ba Social effects: The green roofs can be used in agricultural production and, therefore, bring community activities and relations among the inhabitants within the buildings and contribute to the approach of the productive processes to the citizens.
\n\u25ba Compost: Green roofs developments raise the city areas suitable for compost use when a cycled system is operating in the inmediate surroundings of the buildings.
\n\u25ba Climate change mitigation: Green roof surfaces help mitigate CO2 emissions by fixing this gas through the photosynthetic process. The average catch is 50g CO2 \/ m2 \/ year depending on the species and substrate thickness.
\n\u25baAir quality. The green roofs contribute to the mitigation of the heat island phenomenon due to the plants capacity as an efficient temperature buffer.<\/p>\n
\n– Intensive: parks and gardens including Urban Agriculture.
\n– Semi-intensive: garden green roofs.
\n– Extensive: natural low maintenance green roofs
\n– Blue-green roofs: that combing green roof and blue roof technologies to maximise water storage.
\n– Biosolar green roofs: where solar energy and green roofs are combined to provide renewable energy and deliver biodiversity.<\/p>\n
\nIn either cases, anti-root protection should be used. In conventional solutions, any kind of insulation can be used with no more limitation than compressive resistance higher than 2 Kp \/ cm\u00b2. In the inverted roof solutions, in which the insulation is located above the waterproof layer, the thermal insulation to be used must have a low absorption of water, so the indicated materials are extruded polystyrene (XPS) and cellular glass (CG).[\/vc_column_text][vc_column_text] <\/em><\/p>\nExtensive green roof with isolation layer in inverted situation.
\n<\/em>[\/vc_column_text][vc_column_text]<\/em><\/p>\n
\n<\/em>[\/vc_column_text][vc_column_text]Vend\u00e9e Historial, les Lucs.
\n<\/em>[\/vc_column_text][\/vc_column][vc_column width=”1\/3″ css=”.vc_custom_1614095927249{background-color: #fdfae4 !important;}”][vc_text_separator title=”BUILDING SCALE INTERVENTION” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_single_image image=”24535″ img_size=”full” alignment=”center”][vc_text_separator title=”ISSUES AFFECTED” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_gallery type=”image_grid” images=”23887,23899,23901,23892,23904,23906,23902,23894,23908,23891,23888,23896″ onclick=”custom_link” custom_links=”https:\/\/www.saulverez.com,https:\/\/www.concellodelugo.com” img_size=”52×52″][vc_text_separator title=”SUITABLE TO BE COMBINED WITH OTHER SOLUTIONS” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_gallery type=”image_grid” images=”25546,25556″ onclick=”custom_link” img_size=”150×55″ custom_links=”http:\/\/www.lugobiodinamico.eu\/catalogo\/en\/proyectos\/ag02-water-collection-and-storage-in-buildings\/,http:\/\/www.lugobiodinamico.eu\/catalogo\/en\/proyectos\/ec01-local-community-gardens-urban-agriculture\/”][vc_text_separator title=”MEASURE ELEMENTS” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]Indicator<\/strong>
\n(I1) CO2 Capture (CaCO2)
\n(I2) % of green roofs<\/p>\n
\n(I1) g CO2\/year
\n(I2) %<\/p>\n
\n(I1) 5 g CO2\/m\u00b2 of roof
\n(I2) 10% of roof
\nDesirable goal<\/strong>
\n(I1) 15 g CO2\/m\u00b2 of roof
\n(I2) 30% of roof<\/p>\n
\n\u0394g CO2 = A x B x C
\nA: % green roof surface
\nB: total roof in the area involved
\nC: Capture capacity CO2\/m2 (depends on the plant species)
\nTo consider the roof as effective, the minimum value for the caputure
\ncapacity should be 20g CO2 \/ m2 of roof \/ year[\/vc_column_text][vc_text_separator title=”PLANNING LEVEL” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]Development plan
\nBuilding construction project[\/vc_column_text][vc_text_separator title=”people INVOLVED” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]Design team
\nAdministration technicians
\nDevelopers
\nOwners[\/vc_column_text][vc_text_separator title=”POSIBLE ACTIONS DEVELOPED BY THE ADMINISTRATION” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]\u2022 Gather a roof index suitable for this strategy through direct observation or geographic analysis on available cartography.
\n\u2022 Social and \/ or economic bonuses to promote this solution.
\n\u2022 Rewriting of the building regulations to allow this kind of roofs.[\/vc_column_text][vc_text_separator title=”What should we consider for its implementation?” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]The building technical conditions:
\n\u2022 The building typology, property issues or regulations conditions in terms of heritage or security.
\nPlants characteristics:
\n\u2022 Climate conditions. Consider local species as first option.
\n\u2022 Fertilization and irrigation maintenance.[\/vc_column_text][vc_text_separator title=”EXAMPLES” color=”custom” style=”dotted” border_width=”2″ accent_color=”#fae699″][vc_column_text]Research on an extensive green roof system adapted
\nto Galicia <\/p>\n<\/a><\/p>\n