Designing green and blue roofs - Revision history

Designing Buildings at 09:12, 7 December 2020

2020-12-07T09:12:12Z

← Older revision		Revision as of 09:12, 7 December 2020
Line 60:		Line 60:
	* Urban heat island.		* Urban heat island.

−	[[Category:~~Research_/_Innovation~~]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:Sustainability]] [[Category:Design]]	+	[[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Design]]

Editor at 12:22, 7 January 2020

2020-01-07T12:22:15Z

← Older revision		Revision as of 12:22, 7 January 2020
Line 49:		Line 49:
	--[[User:KLH_Sustainability\|KLH Sustainability]]		--[[User:KLH_Sustainability\|KLH Sustainability]]

−	~~= Find out more =~~	+	= Related articles on Designing Buildings Wiki =
−		+
−	=== Related articles on Designing Buildings Wiki ===	+

	* Circular economy.		* Circular economy.
Line 57:		Line 55:
	* Green roof.		* Green roof.
	* Green walls.		* Green walls.
		+	* Hawley Mews.
	* Rainwater harvesting		* Rainwater harvesting
	* Types of roof.		* Types of roof.
	* Urban heat island.		* Urban heat island.

−	[[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Design]]	+	[[Category:Research_/_Innovation]] [[Category:DCN_Research,_Development_and_Innovation]] [[Category:Sustainability]] [[Category:Design]]

Designing Buildings at 18:05, 22 February 2018

2018-02-22T18:05:51Z

← Older revision		Revision as of 18:05, 22 February 2018
Line 56:		Line 56:
	* Cool roofs.		* Cool roofs.
	* Green roof.		* Green roof.
		+	* Green walls.
	* Rainwater harvesting		* Rainwater harvesting
	* Types of roof.		* Types of roof.

Designing Buildings at 14:51, 31 October 2017

2017-10-31T14:51:49Z

← Older revision		Revision as of 14:51, 31 October 2017
Line 54:		Line 54:

	* Circular economy.		* Circular economy.
		+	* Cool roofs.
	* Green roof.		* Green roof.
	* Rainwater harvesting		* Rainwater harvesting

Designing Buildings: moved Designing Green and Blue Roofs to Designing green and blue roofs

2017-10-31T14:50:50Z

moved Designing Green and Blue Roofs to Designing green and blue roofs

← Older revision

Revision as of 14:50, 31 October 2017

Designing Buildings at 14:50, 31 October 2017

2017-10-31T14:50:20Z

← Older revision		Revision as of 14:50, 31 October 2017
Line 9:		Line 9:
	= Establishment =		= Establishment =

−	Vegetated roofs, even low-maintenance, non-accessible, ~~[https://livingroofs.org/introduction-types-green-roof/~~ extensive] roofs, need to be maintained and irrigated properly for the first two growing seasons after installation. Many roofs fail because a maintenance regime is not properly implemented, especially in the period between installation and project handover. Irrigation systems for the establishment period need proper consideration at design stage. It may be as simple as a tap to connect a hosepipe or, for difficult to access roofs an integrated drip irrigation system.	+	Vegetated roofs, even low-maintenance, non-accessible, extensive roofs, need to be maintained and irrigated properly for the first two growing seasons after installation. Many roofs fail because a maintenance regime is not properly implemented, especially in the period between installation and project handover. Irrigation systems for the establishment period need proper consideration at design stage. It may be as simple as a tap to connect a hosepipe or, for difficult to access roofs an integrated drip irrigation system.

	= Irrigation and maintenance =		= Irrigation and maintenance =

−	Appropriately designed extensive roofs may not need long-term irrigation, though they ~~[http://www.aecb.net/green-roofs-why-so-many-go-wrong-and-how-to-get-it-right/~~ can’t be forgotten] entirely, particularly during dry periods. Intensive roofs, such as Jubilee Gardens above Canary Wharf Station, need to be regularly irrigated and maintained like a garden. Blue roofs should be inspected regularly to ensure outlets are not blocked and there is no damage to the waterproofing. It is essential to provide safe access to roofs for regular maintenance and inspection.	+	Appropriately designed extensive roofs may not need long-term irrigation, though they can’t be forgotten entirely, particularly during dry periods. Intensive roofs, such as Jubilee Gardens above Canary Wharf Station, need to be regularly irrigated and maintained like a garden. Blue roofs should be inspected regularly to ensure outlets are not blocked and there is no damage to the waterproofing. It is essential to provide safe access to roofs for regular maintenance and inspection.

	= Loading =		= Loading =

−	It is a common misconception that green and blue roofs cause such an increase in loading that the cost of strengthening the structure to support it makes them unfeasible. Before dismissing a sustainable roof option for this reason, it’s important to understand the range of options available. Green roofs can come with varying depths of substrate and quantities of soil and blue roofs can hold different depths of water, so they can be designed to fit the structure, whether new or retrofitted. ~~[http://www.alumascroofing.co.uk/products/waterproofing/sustainable-roofing-systems/bluroof-stormwater-management/~~ Some~~] [http://www.abg-geosynthetics.com/applications/green-and-blue-roofs.html~~ manufacturers] suggest weight can be offset, for example blue roofs can eliminate the need for screed.	+	It is a common misconception that green and blue roofs cause such an increase in loading that the cost of strengthening the structure to support it makes them unfeasible. Before dismissing a sustainable roof option for this reason, it’s important to understand the range of options available. Green roofs can come with varying depths of substrate and quantities of soil and blue roofs can hold different depths of water, so they can be designed to fit the structure, whether new or retrofitted. Some manufacturers suggest weight can be offset, for example blue roofs can eliminate the need for screed.

	= Waterproofing =		= Waterproofing =
Line 37:		Line 37:
	= Soil =		= Soil =

−	The type, depth, source, richness and particle size matters. Different plants require different depths and richness of soil. Variation in depth and type fosters better invertebrate habitat. Using recycled construction waste can be good for circular economy, but leaching from the reused materials must be considered for water and soil quality, and concrete rubble should be avoided.	+	The type, depth, source, richness and particle size matters. Different plants require different depths and richness of soil. Variation in depth and type fosters better invertebrate habitat. Using recycled construction waste can be good for the circular economy, but leaching from the reused materials must be considered for water and soil quality, and concrete rubble should be avoided.

	= Water storage =		= Water storage =
Line 45:		Line 45:
	= Water quality and reuse =		= Water quality and reuse =

−	In green roofs, rainwater is filtered as it goes through the soil, providing water quality benefit for discharge or reuse. Green and blue roofs can also be linked to rainwater harvesting systems, though for green roofs, the residual colour makes the reused water suitable mainly for external use.	+	In green roofs, rainwater is filtered as it goes through the soil, providing water a quality benefit for discharge or reuse. Green and blue roofs can also be linked to rainwater harvesting systems, though for green roofs, the residual colour makes the reused water suitable mainly for external use.

	--[[User:KLH_Sustainability\|KLH Sustainability]]		--[[User:KLH_Sustainability\|KLH Sustainability]]
Line 53:		Line 53:
	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===

−	Green roof.	+	* Circular economy.
−		+	* Green roof.
−	Urban heat island.	+	* Rainwater harvesting
		+	* Types of roof.
		+	* Urban heat island.

	[[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Design]]		[[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Design]]

Designing Buildings at 14:44, 31 October 2017

2017-10-31T14:44:14Z

← Older revision		Revision as of 14:44, 31 October 2017
Line 1:		Line 1:
		+	= Introduction =
		+
	Whether it's due to a desire to capture surface water, increase biodiversity, provide habitat, reduce the urban heat island effect, produce renewable energy, improve air quality, provide amenities to building occupants or all of the above, there's an increased awareness about the possibilities of sustainable roof infrastructure, but for many, the challenge now comes in the implementation.		Whether it's due to a desire to capture surface water, increase biodiversity, provide habitat, reduce the urban heat island effect, produce renewable energy, improve air quality, provide amenities to building occupants or all of the above, there's an increased awareness about the possibilities of sustainable roof infrastructure, but for many, the challenge now comes in the implementation.

−	~~We find that developers~~, architects and engineers know they should incorporate green roofs, but don’t know the various types, constraints, or details to consider. Incorrect assumptions and treating them as afterthoughts can lead to quick dismissal of options or incorrect design and failed systems.	+	Developers, architects and engineers know they should incorporate green roofs, but don’t know the various types, constraints, or details to consider. Incorrect assumptions and treating them as afterthoughts can lead to quick dismissal of options or incorrect design and failed systems.
		+
		+	While not a comprehensive list, here are some key things to consider when deciding to incorporate a sustainable roof.
		+
		+	= Establishment =
		+
		+	Vegetated roofs, even low-maintenance, non-accessible, [https://livingroofs.org/introduction-types-green-roof/ extensive] roofs, need to be maintained and irrigated properly for the first two growing seasons after installation. Many roofs fail because a maintenance regime is not properly implemented, especially in the period between installation and project handover. Irrigation systems for the establishment period need proper consideration at design stage. It may be as simple as a tap to connect a hosepipe or, for difficult to access roofs an integrated drip irrigation system.
		+
		+	= Irrigation and maintenance =
		+
		+	Appropriately designed extensive roofs may not need long-term irrigation, though they [http://www.aecb.net/green-roofs-why-so-many-go-wrong-and-how-to-get-it-right/ can’t be forgotten] entirely, particularly during dry periods. Intensive roofs, such as Jubilee Gardens above Canary Wharf Station, need to be regularly irrigated and maintained like a garden. Blue roofs should be inspected regularly to ensure outlets are not blocked and there is no damage to the waterproofing. It is essential to provide safe access to roofs for regular maintenance and inspection.
		+
		+	= Loading =
		+
		+	It is a common misconception that green and blue roofs cause such an increase in loading that the cost of strengthening the structure to support it makes them unfeasible. Before dismissing a sustainable roof option for this reason, it’s important to understand the range of options available. Green roofs can come with varying depths of substrate and quantities of soil and blue roofs can hold different depths of water, so they can be designed to fit the structure, whether new or retrofitted. [http://www.alumascroofing.co.uk/products/waterproofing/sustainable-roofing-systems/bluroof-stormwater-management/ Some] [http://www.abg-geosynthetics.com/applications/green-and-blue-roofs.html manufacturers] suggest weight can be offset, for example blue roofs can eliminate the need for screed.
		+
		+	= Waterproofing =
		+
		+	This is a key concern, especially for blue roofs, but it comes down to good detailing and installation. Many suppliers provide warranties and installation supervision. If installed correctly, there should not be any more concern than for a typical roof.
		+
		+	= Biodiversity =
		+
		+	This means more than incorporating a diverse set of plants, it also means different soil depths, textures, habitats (like log piles and insect hotels) and coverings. The early input of an ecologist can ensure the roof responds to local wildlife opportunities.
		+
		+	= Thermal performance =
		+
		+	Green and blue roofs can be installed on both warm and inverted roofs. The systems are generally separate from the thermal envelope, so are excluded from thermal calculations. They do still provide cooling benefits to the surrounding area, roof mounted solar panels and top floor units.

−	~~While not a comprehensive list, here are some key things to consider when deciding to incorporate a sustainable roof:~~	+	= Location =

		+	Orientation of the roof, availability of sunlight, amount of wind and visibility will influence the design. Green roofs can be used on shallow pitched roofs and retrofitted onto existing buildings.

		+	= Soil =

−	* Establishment: Vegetated roofs, ~~even low-maintenance~~, ~~non-accessible~~, ~~[https://livingroofs~~.~~org/introduction-types-green-roof/ extensive] roofs, need to be maintained~~ and ~~irrigated properly for the first two growing seasons after installation~~. ~~Many roofs fail because a maintenance regime is not properly implemented, especially~~ in ~~the period between installation~~ and ~~project handover~~. ~~Irrigation systems~~ for the ~~establishment period need proper consideration at design stage. It may~~ be ~~as simple as a tap to connect a hosepipe or~~, ~~for difficult to access roofs an integrated drip irrigation system~~.~~<br />~~	+	The type, depth, source, richness and particle size matters. Different plants require different depths and richness of soil. Variation in depth and type fosters better invertebrate habitat. Using recycled construction waste can be good for circular economy, but leaching from the reused materials must be considered for water and soil quality, and concrete rubble should be avoided.

−	* Irrigation & maintenance: Appropriately designed extensive roofs may not need long-term irrigation, though they [http://www.aecb.net/green-roofs-why-so-many-go-wrong-and-how-to-get-it-right/ can’t be forgotten] entirely, particularly during dry periods. Intensive roofs, such as Jubilee Gardens above Canary Wharf Station, need to be regularly irrigated and maintained like a garden. Blue roofs should be inspected regularly to ensure outlets are not blocked and there is no damage to the waterproofing. It is essential to provide safe access to roofs for regular maintenance and inspection.<br />	+	= Water storage =

−	* Loading: It is a common misconception that green and ~~blue roofs cause such an increase in loading that the cost~~ of ~~strengthening the structure to support it makes them unfeasible~~. ~~Before dismissing a sustainable roof option for this reason~~, ~~it’s important to understand the range~~ of ~~options available~~. ~~Green~~ roofs can ~~come with varying depths of substrate and quantities of soil~~ and blue roofs ~~can hold different depths of water~~, ~~so they can be designed to fit~~ the ~~structure, whether new or retrofitted~~. ~~[http://www~~.~~alumascroofing.co.uk/products/waterproofing/sustainable-roofing-systems/bluroof-stormwater-management/ Some] [http://www.abg-geosynthetics.com/applications/green-~~and-blue-roofs~~.html manufacturers] suggest weight can be offset~~, ~~for example blue~~ roofs can ~~eliminate the need for screed~~.~~<br />~~	+	The usefulness of green roof substrates for water storage depends on depth and saturation, which is calculated based on season and size of storm. In addition, less compacted soil and presence of voids can help store more surface water. Blue roofs can be placed under all green roof types, as well as under decking and podiums. For blue roofs, the drainage benefit comes from the depth and design of the outlet. Smart technology is being developed to allow blue roofs to discharge in line with upcoming weather patterns. Green and blue roofs mainly reduce discharge rates, though green roofs can have limited volume reduction benefits from evapotranspiration.

−	* Waterproofing: This is a key concern, especially for blue roofs, but it comes down to good detailing and ~~installation. Many suppliers provide warranties and installation supervision. If installed correctly, there shouldn’t be any more concern than for a typical roof.<br />~~	+	= Water quality and reuse =

−	* Biodiversity: This means more than incorporating a diverse set of plants, it ~~also means different~~ soil ~~depths~~, ~~textures, habitats (like log piles and insect hotels) and coverings~~. ~~The early input of an ecologist~~ can ~~ensure the roof responds~~ to ~~local wildlife opportunities~~.~~<br />~~	+	In green roofs, rainwater is filtered as it goes through the soil, providing water quality benefit for discharge or reuse. Green and blue roofs can also be linked to rainwater harvesting systems, though for green roofs, the residual colour makes the reused water suitable mainly for external use.

−	* Thermal performance: Green and blue roofs can be installed on both warm and inverted roofs. The systems are generally separate from the thermal envelope, so are excluded from thermal calculations. They do still provide cooling benefits to the surrounding area, roof mounted solar panels and top floor units.<br />	+	--[[User:KLH_Sustainability\|KLH Sustainability]]

−	* Location: Orientation of the roof, availability of sunlight, amount of wind and visibility will influence the design. Green roofs can be used on shallow pitched roofs and retrofitted onto existing buildings.<br />	+	= Find out more =

−	* Soil: The type, depth, source, richness and particle size matters. Different plants require different depths and richness of soil. Variation in depth and type fosters better invertebrate habitat. Using recycled construction waste can be good for circular economy, but leaching from the reused materials must be considered for water and soil quality, and concrete rubble should be avoided.<br />	+	=== Related articles on Designing Buildings Wiki ===

−	* Water storage: The usefulness of green roof substrates for water storage depends on depth and saturation, which is calculated based on season and size of storm. In addition, less compacted soil and presence of voids can help store more surface water. Blue roofs can be placed under all green roof types, as well as under decking and podiums. For blue roofs, the drainage benefit comes from the depth and design of the outlet. Smart technology is being developed to allow blue roofs to discharge in line with upcoming weather patterns. Green and blue roofs mainly reduce discharge rates, though green roofs can have limited volume reduction benefits from evapotranspiration.~~<br />~~	+	Green roof.

−	* Water quality & reuse: In green roofs, rainwater is filtered as it goes through the soil, providing water quality benefit for discharge or reuse. Green and blue roofs can also be linked to rainwater harvesting systems, though for green roofs, the residual colour makes the reused water suitable mainly for external use.	+	Urban heat island.

−	[[Category:Research_/_Innovation]] [[Category:Design]]	+	[[Category:Research_/_Innovation]] [[Category:Sustainability]] [[Category:Design]]

KLH Sustainability: Created page with "Whether it's due to a desire to capture surface water, increase biodiversity, provide habitat, reduce the urban heat island effect, produce renewable energy, improve air quality,..."

2017-07-28T11:32:16Z

Created page with "Whether it's due to a desire to capture surface water, increase biodiversity, provide habitat, reduce the urban heat island effect, produce renewable energy, improve air quality,..."

New page

Whether it's due to a desire to capture surface water, increase biodiversity, provide habitat, reduce the urban heat island effect, produce renewable energy, improve air quality, provide amenities to building occupants or all of the above, there's an increased awareness about the possibilities of sustainable roof infrastructure, but for many, the challenge now comes in the implementation.

We find that developers, architects and engineers know they should incorporate green roofs, but don’t know the various types, constraints, or details to consider. Incorrect assumptions and treating them as afterthoughts can lead to quick dismissal of options or incorrect design and failed systems.

While not a comprehensive list, here are some key things to consider when deciding to incorporate a sustainable roof:

* Establishment: Vegetated roofs, even low-maintenance, non-accessible, [https://livingroofs.org/introduction-types-green-roof/ extensive] roofs, need to be maintained and irrigated properly for the first two growing seasons after installation. Many roofs fail because a maintenance regime is not properly implemented, especially in the period between installation and project handover. Irrigation systems for the establishment period need proper consideration at design stage. It may be as simple as a tap to connect a hosepipe or, for difficult to access roofs an integrated drip irrigation system. 

* Irrigation & maintenance: Appropriately designed extensive roofs may not need long-term irrigation, though they [http://www.aecb.net/green-roofs-why-so-many-go-wrong-and-how-to-get-it-right/ can’t be forgotten] entirely, particularly during dry periods. Intensive roofs, such as Jubilee Gardens above Canary Wharf Station, need to be regularly irrigated and maintained like a garden. Blue roofs should be inspected regularly to ensure outlets are not blocked and there is no damage to the waterproofing. It is essential to provide safe access to roofs for regular maintenance and inspection. 

* Loading: It is a common misconception that green and blue roofs cause such an increase in loading that the cost of strengthening the structure to support it makes them unfeasible. Before dismissing a sustainable roof option for this reason, it’s important to understand the range of options available. Green roofs can come with varying depths of substrate and quantities of soil and blue roofs can hold different depths of water, so they can be designed to fit the structure, whether new or retrofitted. [http://www.alumascroofing.co.uk/products/waterproofing/sustainable-roofing-systems/bluroof-stormwater-management/ Some] [http://www.abg-geosynthetics.com/applications/green-and-blue-roofs.html manufacturers] suggest weight can be offset, for example blue roofs can eliminate the need for screed. 

* Waterproofing: This is a key concern, especially for blue roofs, but it comes down to good detailing and installation. Many suppliers provide warranties and installation supervision. If installed correctly, there shouldn’t be any more concern than for a typical roof. 

* Biodiversity: This means more than incorporating a diverse set of plants, it also means different soil depths, textures, habitats (like log piles and insect hotels) and coverings. The early input of an ecologist can ensure the roof responds to local wildlife opportunities. 

* Thermal performance: Green and blue roofs can be installed on both warm and inverted roofs. The systems are generally separate from the thermal envelope, so are excluded from thermal calculations. They do still provide cooling benefits to the surrounding area, roof mounted solar panels and top floor units. 

* Location: Orientation of the roof, availability of sunlight, amount of wind and visibility will influence the design. Green roofs can be used on shallow pitched roofs and retrofitted onto existing buildings. 

* Soil: The type, depth, source, richness and particle size matters. Different plants require different depths and richness of soil. Variation in depth and type fosters better invertebrate habitat. Using recycled construction waste can be good for circular economy, but leaching from the reused materials must be considered for water and soil quality, and concrete rubble should be avoided. 

* Water storage: The usefulness of green roof substrates for water storage depends on depth and saturation, which is calculated based on season and size of storm. In addition, less compacted soil and presence of voids can help store more surface water. Blue roofs can be placed under all green roof types, as well as under decking and podiums. For blue roofs, the drainage benefit comes from the depth and design of the outlet. Smart technology is being developed to allow blue roofs to discharge in line with upcoming weather patterns. Green and blue roofs mainly reduce discharge rates, though green roofs can have limited volume reduction benefits from evapotranspiration. 

* Water quality & reuse: In green roofs, rainwater is filtered as it goes through the soil, providing water quality benefit for discharge or reuse. Green and blue roofs can also be linked to rainwater harvesting systems, though for green roofs, the residual colour makes the reused water suitable mainly for external use.

[[Category:Research_/_Innovation]] [[Category:Design]]