Blue Green Roofs - Advantages. Paved areas, such as driveways, roof tops, parking lots, and streets contribute to the amount of storm water that flows through a city as these surfaces are typically impervious and keep precipitation from seeping into the soil and recharging groundwater supplies. However, on the new-build projects that are specified with a BluRoof, these loads can typically be accommodated without issue: . STORMWATER MANAGEMENT PRACTICE HIERARCHY CHECKLIST. In addition, some systems spray the stored water back on the . As of yet, no new details have been released concerning how the effort will be supported by the city. However, on the new-build projects that are specified with a BluRoof, these loads can typically be accommodated without issue: . Presice and automized run-off control to disburden grey infrastructure and adding substantial LEED® credits make these solution pay back in a short time. Stormwater Pioneer. Blue roof systems are an effective practice for controlling runoff from buildings with flat or mildly sloped roof surfaces. A blue roof may be used as a stand-alone detention method or because they do little to improve the water quality of runoff, as part of a treatment train that includes other low impact development and conventional best management practices (BMPs) such as bioretention, infiltration, wetland systems, or green roofs to enhance the function, improve . PMR Blue Roof Assemblies. Blue Roof Technology. PMR Blue Roof Assemblies. Partner-Sales Director North . Blue-roof trays are held in place with stone ballast and hold up to 2 inches of water. The data used for this study were collected during the actual storm events of more than 30 mm/hr and 60 mm/hr rainfall intensity in July and September 2014 at green blue roof and blue roof. Presice and automized run-off control to disburden grey infrastructure and adding substantial LEED® credits make these solution pay back in a short time. Last winter, we at Rain Brothers, LLC designed, developed, and installed a simple, cost-effective "blue roof" system for managing stormwater for the City of Grove City here in Ohio. From the result, retention from green roof and green blue roof were found to be around 10-60% and 30-68% during small rain events respectively. Based on lessons learned from two North America projects, this talk will be an overview of when to combine a green roof and a water detention system, design benefits and challenges, and installation and long term . Upon what was formerly 1960's office accommodation the Cromwell House site has been transformed into an 8 storey, 120-bedroom easyHotel with a rooftop stormwater … On the other hand, blue roof was effective in small rain events for a shorter period of time. Using standard ballast stone, the water in the blue roof is stored within the void spaces of the stone and to the required level above the ballast. You also benefit from filtration, habitat creation and other value . A "blue roof" is a new best management practice (or BMP) for stormwater -- specifically, it is a way to slow a rain event by . surfaces side by side- Blue Roofs and Green Roofs, on the roof of PS 118 in Queens. Furthermore, it can be combined with additional retention layers for superior performance. Blue roof systems are a popular stormwater management option for flat roof buildings, particularly within the industrial, commercial and institutional (ICI) sector (which make up 23 - 30% of most urbanized areas) . Would you like more information? klima roof. A blue roof is a non-vegetated or semi-vegetated roof design that is intended to detain and control the flow of stormwater or persistent rainfall. Read more about Purple-Roof and Stormwater Management. Over the next several years, New York City alone will spend several billion dollars on green infrastructure solutions to address its storm-water-control problem, and blue roofs will be a key part of these efforts. According to the National Federation of Roofing Contractors: "A Blue Roof is a Flat Roof, designed to allow controlled attenuation of rain fall during heavy and storm events as part of a Sustainable Urban Drainage Systems (SUDS) good practise . Stormwater Management on the Roof. • Blue roofs are non-vegetated source controls that detain stormwater. During . hydroPAVERS® on GR52 to create a pervious puddle free, slip resistant patio / roof deck area. Last winter, we at Rain Brothers, LLC designed, developed, and installed a simple, cost-effective "blue roof" system for managing stormwater for the City of Grove City here in Ohio. Blue Roof Type: Roof Drain Restrictor. A Blue Roof can be created on a typical Hydrotech PMR (Protected Membrane Roof Assembly) utilizing standard loose stone for ballast. The key components include a geotextile filter fabric . With increasing interests in using rooftops for stormwater management, green roofs and blue roofs have evolved to combine enhanced retention and advanced detention to provide greater stormwater management capabilities. A blue roof is a roof of a building that is designed explicitly to provide initial temporary water storage and then gradual release of stored water, typically rainfall. High cooling effect for roofs and plazas. Detaining stormwater and removing pollutants is the primary purpose of stormwater management. The loads imposed by a blue roof are checked against the capacity of the roof's structure by the project's structural engineer on a project-by-project basis. The blue roof meets the peak flow rate reductions required by the Stormwater Management rules for the 2-, 10- and 100-year storm. A blue roof is a non-vegetated or semi-vegetated roof design that is intended to detain and control the flow of stormwater or persistent rainfall. Courtesy Next Level Stormwater Management. The Future of Blue Roofs. Blue-green infrastructure (BGI) has been recognized as an important tool for sustainableStormwater sustainable management urbanUrban stormwater stormwaterStormwater management managementUrban stormwater management . In other cases, a blue roof can slowly irrigate a lower green roof, and in still other cases, the water can be routed to an onsite water-harvesting . Explore how you can maximize a green roof area for stormwater management by overlapping 'Blue Roof' and Green Roof Technologies. Stormwater Credits Program 1101 Market Street- 4th Floor Philadelphia, PA 19107 PWD.StormwaterCredits@phila.gov. Swales are commonly found along roads, parking lots, or between properties . 4.6.1 Blue Roof Introduction. The collected stormwater is then slowly released to roof drains or allowed to evaporate. As described in this CBC article, blue roofs are an emerging rainwater harvesting technology that stores stormwater on roofs.Benefits of blue roofs include climate adaptation advantages such as flood prevention and reduced stormwater infrastructure costs, as well as water reuse and energy conservation. Good. They can be designed as modular trays with loose stones, specialized permeable pavers, or just a waterproof membrane. While a large body of research has demonstrated the significant water management benefits of green roofs, this study will consider the potential of blue . Blue Roof. New Jersey Stormwater Best Management Practices Manual Updated November 2016 Chapter 9.8 Blue Roofs Page 2 Introduction A blue roof is a system designed to store and to slowly release stormwater. These roofs will collect rainwater and other precipitation so that it can be drained slowly or redirected for re-use. Saturated Weight with 4" water depth 22.2 lbs./ft2. is the world's first Blue-Roof-Ready system with Smart Flow control that can be paired with any design intent. in many cities. A conventional . Blue Roof Type: Roof Drain Restrictor. In urban . If there are other disturbed areas on-site, such as parking lots and sidewalks, they will also require stormwater management measures and hydrologic analyses to demonstrate compliance with the Stormwater Management . An annual market survey conducted by Green Roofs for Healthy Cities (GRHC) shows the North American industry grew by 10 per cent in 2013 over the previous year, when a total of 519,151 m 2 (6.4 million . Blue roofs, also known as controlled flow roof drain systems, are detention stormwater management practices (SMPs) that provide temporary storage and slow release of rainwater on a rooftop. Section 3.2 contains a significant amount of design guidance that the designer should use to integrate robust and cost-effective stormwater management into site designs in ways that achieve the Philadelphia Water Department's (PWD's) key stormwater management goals of minimizing the harmful effects of flooding and maintaining the health of Philadelphia's . is the world's first Blue-Roof-Ready system with Smart Flow control that can be paired with any design intent. Day by day, blue roofs are becoming more sophisticated. Denser developments - especially in urban areas - often have very limited space for the typical stormwater management techniques. In a blue roof, the roof drains incorporate a restrictor to dra- Maximize stormwater management in combination with natural environment. Benefits : Blue roofs slow storm water. Because the flow rate leaving a blue roof is less than that of a A blue roof is designed to slow or store stormwater runoff, easing the burden on the stormwater systems. After a storm, the system ensures that water from the rooftop is released into the stormwater disposal system only when there is sufficient capacity to handle the excess flow . A grass drainage swale is an open channel that collects water from hard surfaces and allows it to percolate into the ground, reducing the amount of runoff leaving the road or property. This combined system captures 20.35 Litres of water per square meter, or 0.491 US Gallons per square foot. In addition to delayed drainage, a blue roof system also can manage stormwater by helping it evaporate. . Stormwater Credits Program 1101 Market Street- 4th Floor Philadelphia, PA 19107 PWD.StormwaterCredits@phila.gov. Integrated Asset Management Framework. Blue roof design comprises; flat roofing or waterproofing, blue roof flow control outlets, suction and capillary fleece, attenuation drainage, water retention layer, filter, protection and storage geotextiles. In urban . Massive quantities of rain and snow fall from the sky every year, burdening city infrastructures and causing pollution, disease and erosion. The BMI Blue Roof system solution . Climate Change continues to create challenges for municipalities and building developers who need to handle increasing amounts of stormwater. Controlling and reducing flow rates from the Green Roof/Roof. Asset Type : Engineered Water Classification: Stormwater . The concept of smart blue roofs has emerged for greater stormwater management potential and benefits compared to vegetated green roof systems. : Yes. You combine the value of a stormwater reservoir (think milk crates again) with the filtration and superior cooling of a green roof. In addition to stormwater management, blue roofs can reduce the urban heat island effect when coupled with light-colored or reflective roof material, as well as provide energy savings in the form . Fair Poor Other Ponded Water? One of the first integrated blue/green roofs is atop the Osborne Association building in South Bronx, New York. The course begins by defining blue roofs and discussing how and why they have developed as a roof design strategy. are the first State-of- the-Art stormwater management where amenity space or simple ballast is wanted or required. At Hazen and Sawyer, we offer sustainable, watershed-based approaches to stormwater management. • Green Roof Tax Abatement Program, New York, NY, offers rebate of $4.50/sf up to $100,000 per project. HG 2510 - Blue Roof Our Blue Roof System offers a distributed runoff collection storage option that can be used to hold water on the rooftop at peak storm periods. A green-blue roof was constructed . : Yes. Fair Poor Roof Membrane Condition: Good. 4.6.1 Blue Roof Introduction; 4.6.2 Blue Roof Components; 4.6.3 Blue Roof Design Standards; 4.6.4 Blue Roof Material Standards; . This course is intended for people seeking a basic knowledge of blue, or water retentive, roofs. . Along with light-colored materials, reduces the urban heat island effect and provides rooftop cooling, lowering a facility's operating costs. We have summarized the advantages and limitations of a few options below. Normal roof drainage is designed to ensure the rapid removal of rainwater from the rooftop via the roof drains and associated plumbing. Vegetal i.D. This hybrid system or blue roof/green roof allows you to maximize your rooftop for stormwater management- allowing for projects that want to green the rooftop, while also providing stormwater detention. A blue roof is a non-vegetated storage system designed into a roof, allowing the structure to retain stormwater. is a solution for a smart cities approach to on-site stormwater management.With H. This is a great method of water attenuation and management of stormwater, and can be key to sustainability in buildings - particularly in urban areas where a ground level solution may not be possible due to lack of space. Amplify evapo-transpiration of vegetation and higher reduction of urban heat island effect. Roof Top hydroPAVERS® On GR52 Water Retention Panels. When combined with the LiveRoof® brand green roof system—which in itself is an effective stormwater tool—the RoofBlue system maximizes rooftop stormwater management capability. Fair Poor Roof Drain Condition: Good. The loads imposed by a blue roof are checked against the capacity of the roof's structure by the project's structural engineer on a project-by-project basis. Piloting and implementing a smart blue roof at CVC's office will allow us to determine and report on the actual costs and benefits of such an innovative system. 3.2 Stormwater Management Design. The Philadelphia Stormwater Management Guidance Manual (the Manual, or SMGM) is a comprehensive resource for the development community in complying with the Philadelphia Water Department (PWD) Stormwater . it means saving our cities from pollution, disease and structural damage. Blue Roof - As a stand-alone system, the LiteN'Less Blue is very effective at absorbing and delaying stormwater runoff. Climate Change continues to create challenges for municipalities and building developers who need to handle increasing amounts of stormwater. Combining a blue roof system with rainwater harvesting (RWH) allows for rainwater reuse and provides additional benefits. Green roofs are very effective stormwater BMPs. Blue roofs are non-vegetated source controls that detain stormwater, either releasing it more gradually to the sewer system or storing it for beneficial reuse. Recognizing a lack of rigorous, verifiable methods for evaluating green roof and urban stormwater infrastructure performance, the Green Roof Diagnostics team has combined extensive experience in engineering, scientific research methods, and industry best . In cramped urban areas, this can be a great way to get maximum use from your rooftop space. Fair Poor Roof Drain Condition: Good. A blue roof is a roof that is designed to hold water. Installation of roof waterproof membrane: Holl Flachdachbau GmbH & Co. KG, 38229 Salzgitter, Germany. . . Roof Check Dam System N/A Notes/ Comments: Overall Condition. The primary stormwater detention requirement was met by creating two blue roof assemblies on the entire Level 13 and 14 roof structures. Qin X, Wu X, Chiew Y, Li Y (2013) A green roof test bed for stormwater management and reduction of urban heat island effect in . A "blue roof" is a new best management practice (or BMP) for stormwater -- specifically, it is a way to slow a rain event by . A blue roof is designed to slow or store stormwater runoff, easing the burden on the stormwater systems. The water collection can be accomplished through everything from building risers that cause water . Blue roofs are less costly than green roofs. One approach involves putting a green roof on top of a blue roof. Advanced rooftop stormwater management options. Minimizes land used for stormwater management, allowing for more recreational and public space area; Blue Roof with Pedestal Pavers Image Credit: Hydropavers, Inc . are the first State-of- the-Art stormwater management where amenity space or simple ballast is wanted or required. Stormwater management means more than getting rid of pesky puddles and mosquito love shacks through effective green roof systems. Fully controlled temporary and/or permanent storage of rainfall to mitigate runoff impacts. Summary. On a blue roof, a system of detention ponds collects storm water, temporarily stores it, and then releases it slowly when the rain has stopped. Permavoid® provides a stable platform with an open space of 95% within the unit. In order to demonstrate that green roofs are legitimate stormwater solutions, the green roof industry needed a formal platform to test and demonstrate the behavior and performance of any green roof system. klima roof. Put simply, a blue roof is a system of rainwater retention and controlled drainage on roofs. The hydroPAVERS® holds a 1/4" rain event, and water drains through after saturation. A blue roof controls the flow of roof drainage by increasing temporary storage and more slowly releasing rainwater by means of detention, which is considered a stormwater management practice (SMP). Each additional retention layer (see image right) captures 32 l/m 2 (0.79 gal/ft 2) of water during rainfall events greatly reducing site runoff. Stormwater Defined Stormwater is water that flows overland during a precipitation event and does not soak into the ground or evaporate. Stormwater management and other benefits Flood mitigation Due to the density of urban development, there is a general lack of permeable surfaces in cities. The drain anticipates the storm and can detain 2 inches of water for up to two days. According to the National Federation of Roofing Contractors: "A Blue Roof is a Flat Roof, designed to allow controlled attenuation of rain fall during heavy and storm events as part of a Sustainable Urban Drainage Systems (SUDS) good practise . The current subsidy for green roofs is $4.50/square foot up to $100,000 which most likely does not cover more than 20-30% of an intensive green roof system. The number of vegetated roofs has consistently experienced double-digit growth over the past decade. Dick Bernauer. "Blue" water detention trays slow the . • Weirs (a small overflow dam) at the roof drain inlets and along the roof can create temporary ponding and gradual release of stormwater. BluRoof Stormwater Management . Image Credits: safeguardeurope.com , xeroflor.ca , gardenvisit.com. NoN/A BluRoof Stormwater Management . Alumasc BluRoof systems comprise a single source, fully warranted waterproofing and sustainable drainage solution designed to alleviate flood risk, or where ground-based attenuation systems are limited, by attenuating stormwater via controlled discharge over a 24-hour period at roof level. NoN/A High cooling effect for roofs and plazas. Pervious Surfaces that are porous and allow rainfall and snowmelt to soak into the soil, Gray infrastructure, such as culverts, gutters, storm sewers, conventional piped drainage, and Blue/Green infrastructure that protect, restore, or mimic the . A 5-minute hop from Cardiff Queen Street and you'll find the first blue roof in Wales. It acts as a temporary sponge, mimicking the hydrology of the site before the building was constructed. klima roof maximizes stormwater retention and detention with artesian water management, well exceeding any other Green Roof systems that rely on "magic sponging" elements or layers of geo textiles. Furthermore, the antecedent dry weather period (ADWP) is also considered a prominent factor which affects the hydrologic performance of the green roof [ 15 ]. The Blue Roof. On blue roofs, stormwater is detained and then slowly released over time through the use of . Good. Paver & Blue Paver Roofs. Vegetal i.D. Project Phases For more information on blue roof technology or CSO management, contact Marcus Quigley, PE ([email protected]) or Steven Roy, LEED AP ([email protected]) at Geosyntec Consultants, Inc., 866.676 . Elevating Hydrotech's Garden Roof Assembly by placing it on Permavoid®, a structural void component (available exclusively through Hydrotech) integrates the many advantages of a vegetative roof with the high water detention capabilities of a blue roof. . Green roof installation: Strassen- und Tiefbau Urban GmbH, 38533 Rethen, Germany. klima roof maximizes stormwater retention and detention with artesian water management, well exceeding any other Green Roof systems that rely on "magic sponging" elements or layers of geo textiles. Fair Poor Other Ponded Water? Green (vegetated) blue roof is the best low impact development (LID) practice to improve the environment and to manage the stormwater rainfall runoff in cities. NYC Stormwater Manual - Appendix A . Denser developments - especially in urban areas - often have very limited space for the typical stormwater management techniques. We have done extensive work that focuses on reducing stormwater runoff by employing Low Impact Development (LID) techniques and Better Site Design practices and naturally treating stormwater runoff through Best Management Practices (BMP s). Blue roofs are non-vegetated systems that hold stormwater. A typical extensive green roof of 3.5 inches depth will reduce the volume of runoff by about 55% in central Pennsylvania and attenuate the peak runoff rates to the level of the pre-development land use. Blue roofs alone or combined with a second on-site water storage system, can be utilized to satisfy local municipalities' stormwater management . Civil engineers thus far relied on basic ASTM tests of individual components that did not tell the complete story. The goal of the Stormwater Laboratory is to be able to test fully assembled green roof systems on a large scale, and expose them to a standardized replicable test. Flow rates are controlled by orifices, weirs, or other outlets. [2,3]. While green roof technology has been one of the main focus areas in the realm of low impact development for more than a decade, blue roofs are increasingly being recognized as a viable and cost-effective alternative for rooftop stormwater management. Unit Depth 4"- One Unit (stackable) Dry Weight 1.4 lbs./ft2. When combined with the LiveRoof® brand green roof system—which in itself is an effective stormwater tool—the RoofBlue system maximizes rooftop stormwater management capability. This may greatly reduce the need for other onsite . It is the simplest blue roof that can be created. The Osborne roof was designed to manage 100,000 gallons of storm water a year, cutting run-off by 32 percent during a typical storm while improving the water quality of the nearby East River. . Hydrotech's Blue Roof is the next step in high performance, rooftop-based stormwater management. ZinCo GmbH, 72622 Nuertingen, Germany A blue roof is a non-vegetated storage system made of stone and a sealed waterproof roof membrane that allows the roof to retain stormwater. Paver & Blue Paver Roofs. The tray systems resulted in a 45 percent . offers modular extensive green roof products such as Hydropack ®, stormwater management solutions and green roof solutions for any pitch using Acropack. Roof Check Dam System N/A Notes/ Comments: Overall Condition. How do Blue Roofs work? Combining storm water management with ecology. When a blue roof is combined with light-colored roofing materials, a blue roof can significantly reduce a building's cooling costs. Blue roofs can help lower peak stormwater drainage volumes, and they provide cooling through the evaporation of moisture. Blue roof 100 0 100 Detention tank 100 0 100 aValues marked "SC" are special cases for criteria-based practices, see Section 4.11 for details on criteria and application. • Green Roof Rebate Program in Washington, DC: provides base funding of $10/sf, and up to $15/sf in targeted sub-watersheds. The grass covering the side slopes and swale bottom provides a filtration surface for the water and helps to reduce the flow velocity. Fair Poor Roof Membrane Condition: Good. DOWNLOAD TECH SHEET. . Credit Valley Conservation's (CVC) main office has a large, flat roof, making it an ideal place for STEP to investigate the feasibility of smart blue roof systems for stormwater management. Surface finishes can include green roofing systems. Green Roof Diagnostics provides unbiased, controlled testing of stormwater management solutions in a state-of-the-art laboratory setting. Jonathan Meier • Jan 09, 2021. Stormwater Management on the Roof. The stormwater management performance of the green roof is different under the different compositions of green roof and climate conditions (rainfall events intensity, duration etc.) The minimum requirement is to manage 1″ of stormwater runoff from the contributing impervious area. Their major drawback is the initial cost. Testing complete assemblies, and exposing them to replicable rain . These blue roof areas were created using structural voiding units which were subsequently overlaid with garden roofs and paver assemblies for retention capacity and to provide proper ballasting. HydroVentiv®, the hydroactive smart roof system developped by Vegetal i.D. Although it might seem like a contradiction, blue roofs are some of the greenest . Green roof build-up: ZinCo system build-up "Stormwater Management Roof" with the retention spacers RSX 80. 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