Blu-Green Roofs

A roof system designed to provide temporary and permanent water storage within, and under, healthy and hearty vegetation. 

Key Advantages of Blu-Green Roofs


Maximize stormwater management by creating a natural environment


Improve carbon sequestration by up to 75% compared to traditional Green Roofs or thin-layered Green Roof systems with sponging elements


Amplify evapotranspiration of vegetation with higher reduction of urban heat island effect 


Boost biodiversity for higher ecological values and more resilliance


Raise economic payback by fully controlled stormwater management


Benefit from higher thermal reduction, resulting in better energy conservation


Up to 80% in reduction of potable water usage on urban farms


Can provide educational benefits, especially when used at public and/or highly visible sites such as schools, recreation centers, libraries, etc.  

Energy Savings & High ROI

In 2013 Baltimore enacted a stormwater fee. Currently, a building with a
200,000 SF roof would be valued at $11,400 per year.

Sustainablu systems have a high payback and eliminate stormwater fees. Blu-Green Roofs also help to reduce energy costs for heating and cooling, or can be combined with solar panels for an even higher ROI.


Stormwater Fee Saved

Blu-Green Roofs VS Smart Blu-Green Roofs


BluGreen Roofs

Blu roofs or controlled-flow roof drain systems, are detention and retention stormwater management practices (SMPs) that provide temporary storage and slow release of rainwater on a rooftop. Blu roof systems are an effective practice for controlling runoff from buildings with flat or mildly sloped roof surfaces.


Smart BluGreen Roofs

On Smart Blu Roofs, water is detained on the roof surface more effectively. The release of detained or retained stormwater is precisely managed by a Smart Flow Control (SFC) and a Weather App. Smart roof drain valves (Smart Flow Control or SFC) operate entirely autonom, powered by solar/battery, and with emergency release. SFC is in applications around the world and have proven high reliability, fast payback, and low maintenance.                       

Similar Systems Provided:

Why Specify a Blu-Green Roof

Development and expansion of towns and cities have seen exponential growth in the use of impervious surfaces. This is causing exceedingly high rates of rainwater runoff. In response, city planners and developers are using Sustainablu systems to regulate and restrict the amount of rainwater leaving a site. This has limited or eliminated combined sewer overflow.


531 S. Water Street                     
Milwaukee, WI 53204