ACO Blue Green Roof Rainwater Attenuation Systems
The ultimate SuDS system - on a roof
ACO Blue Roof System
- Rainwater attenuation system separated from roof waterproofing layer by under drain layer.
- Underdrain layer allows rainwater tank to drain quickly in exceedance events
- The attenuation system can drain slowly. As little as 0.07l/s?
- Rainwater held in separate tank above roof waterproofing.
- Water never in contact with roof waterproofing for more than a few seconds in overflow situation. Risk of roof failure minimal
Other Blue Roof Systems
- Rainwater Attenuation system laid on top of roof water proofing system
- Flat Roof can’t drain quickly
- Drainage layer can drain slowly functioning as a blue roof
- Rainwater ponding on roof waterproofing
- Rainwater is held on roof waterproofing increasing risk of roof failure.
The Patented ACO Blue Roof System
Complies with Building Standards and Regulations and reduces risk
- The Patented ACO Blue/Green Roof system complies with Building Standards and Regulations by ensuring the flat roof can drain quickly in extreme events and slowly in normal use.
- The ACO solution separates the competing drainage requirements by engineering an elevated structural attenuation system that operates independently of the flat roof drainage system, allowing both storm eventualities and systems to be engineered to known standards and best practice.
No Compromise in design
- Separating the design issues ensures that compromise is not needed. The attenuation system can drain slowly in normal use and in an unforeseen eventuality the attenuation system can be bypassed if necessary and the flat roof drain quickly.
- The system operates by creating a structural drainage void between the top of the roof waterproofing and the underside of the attenuation lining membrane that surrounds ACO RoofBloxx.
- As the blue roof tank sits inside the roof area a weir overflow is created at the perimeter of the tank and above the ACO roof outlets ensuring free flow of rainwater if the blue roof tank is full.
- The design of the system allows the blue roof tank to be controlled through as few ACO blue roof flow restrictors as needed and integrates with the ACO range of roofing outlets.
- The ACO blue roof system ensures water is not encouraged to remain in contact with the waterproofing layer dramatically lowering the building risk.
- We work with selected roofing partners (please contact ACO) who offer single point warranties for the complete roof build-up.
Applications for the system
- The system can be incorporated under a wide range of roof finishes from soft landscaping to trafficked areas, and with a variety of roof construction types including inverted roofs, warm roofs and podium decks.
- Our ACO RoofBloxx rainwater attenuation system is designed specifically as a green roof drainage layer for use on blue, green and blue/green roof construction applications.
- The ACO RoofBloxx system is fully compatible with other ACO drainage systems as well as ACO Pipe™ products,
- The ACO system allows for rainwater re-use and passive irrigation which ‘other’ systems cannot.
Meeting regulations/planning conditions
- The Patented ACO design helps meet the requirements of the London Plan as it allows the Blue Roof to be effectively used for Rainwater Harvesting and irrigation which is the 1st point on the drainage hierarchy on the Sustainable Drainage policy of the London Plan..
Featured Downloads
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Our updated guide explores how Blue Green Roofs can be designed using different roof build ups to drain slowly in normal use and quickly in extreme conditions.
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Read this guide about how Blue Green Roofs can be designed to drain slowly in normal use and quickly in extreme conditions, using ACO RoofBloxx
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A Design Guide to the ACO RoofBloxx system showing the build ups for a variety of roof types. We can help with calculations for any roof.
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Download our guide to learn more about the key approaches and considerations when designing a Blue Roof.
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Read a summary of our blue roof system and the components used to allow it to drain slowly in normal use and quickly in storm conditions
DownloadBlue, green and blue/green roofs have an increasingly important role to play in the creation of the sustainable urban environments which society needs and demands, they are ideal flat roof drainage systems and provide numerous benefits including:
- Climate Change - Flood control
- Urban Heat Island Mitigation
- Amenity space
- Passive rainwater harvesting and mitigation
- Energy efficiency through improved insulation
- In addition, local planning guidance (e.g. The London Plan) increasingly recommends the use of blue green infrastructure as part of a roof build up wherever possible.
- Reduced water bills if blue roof used to capture grey water for use in the building
Read how the ACO system overcomes the design challenges for blue roofs in our article 'The Design Dilemma'
Need help to design a Blue roof? Talk to our team call 01462 810400 or click the link below to email us.
Case Studies - Learn more about our projects
ACO RoofBloxx
ACO RoofBloxx offers architects, engineers and property owners an environmentally sustainable, efficient and cost-effective method to reduce rainwater run-off, enabling water storage and irrigation of blue/green roofs in urban environments.
ACO Blue Roof Flow Restrictor
The ACO blue roofing outlet flow restrictor and overflow enables designers to control the rate of water runoff from a blue roof. The restrictor has been designed for use with the ACO range roof outlets and accessories.
ACO RoofBloxx Reservoir Tray
The ACO RoofBloxx Reservoir Tray is a lightweight interlocking modular green roof tray which offers complete design flexibility