Performance Engineering

Stormwater Performance Simulation: Put it to the virtual test.

Green roofs are excellent at controlling and filtering rainwater, but surprisingly, like many other Low Impact Development (LID) stormwater measures (e.g., raingardens and bioswales), published data on performance is limited. Fortunately, that doesn’t mean the data isn’t out there. At your request, we can provide rational runoff coefficients and NRCS curve numbers for projects constructed in temperate areas of the United States. We use simulation data to demonstrate how your green roof can contribute to site-wide stormwater management, allowing you to free up valuable real estate for useful development.

Requiring local rainfall data on 5-minute intervals and information about seasonal potential evaprotranspiration (PET) rates, our simulation program is typically run for a 10 to 20 year climatic cycle. Detailed statistical summaries of the green roof performance derived from the model, allows us to provide reliable estimates of runoff rate attenuation, runoff volume reductions, etc.

Want to know more? Read on or contact us for a personal webinar regarding your next project.

Heating and Cooling Load Analysis: Take a load off.

Energy load is incredibly important in building design from the very beginning; affecting everything from material choice to climate control engineering. If you need to know the energy effects of green roof installation on your design or existing structure, we can conduct a simplified building envelope analysis that can help you set some reliable benchmarks for energy-related savings.

Many factors contribute to ability of green roofs to cool roofs and reduce the rate that heat flows into and out of a building. These all have to be taken into account, and modeling their effects can be daunting. While the overall industry’s ability to calculate green roof energy transfer is improving, we use new models that predict energy benefits based on the underlying physics, as well as data collected by the National Research Council of Canada, Penn State University and other reputable sources. This holistic approach allows us to give you the best energy-load data possible with today’s constantly evolving science.

Want to know more? Read on or contact us for a personal webinar regarding your next project.