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Multi-Technology Roof Assessment and Retrofit Program

Solution Overview

In 2015, the District's Department of General Services (DGS) launched a comprehensive roof assessment initiative that evaluated over 250 acres of District-owned roofs for their suitability for solar photovoltaics (PVs), solar thermal, green roofs, daylighting, or cool roofs.[1][2][4] This approach was designed to mitigate emissions and adapt to four local climate change-related challenges: extreme heat events, extreme precipitation, sea-level rise, and storm surge.[1] The assessments identified dozens of sites that could benefit from roof improvement projects, allowing DGS to install over 150,000 square feet of measures across the District.[2]

Technical Components

The implementation encompasses multiple roof technologies tailored to specific building characteristics. Solar photovoltaic installations generate renewable energy on suitable structures, while cool roofs reflect solar radiation to reduce heat absorption.[1][4] The Department of General Services manages a portfolio of green roofs at various District-owned facilities.[3] Many of these green roofs were installed by Furbish Company, LLC and contain proprietary systems including EcoCline® and SmartSlope®.[3] The assessment process analyzed each roof across the 250-acre portfolio for its technical suitability for solar thermal systems, daylighting applications, and vegetation-based installations.[2][5][6]

Implementation Details

The 2015 assessment covered over 250 acres of District-owned roofs, systematically analyzing each property for optimal roof technology applications.[1][7][8] Following the comprehensive evaluation, DGS installed over 150,000 square feet of measures across dozens of identified sites throughout the District.[2] Furbish Company, LLC served as a key implementation partner, deploying proprietary green roof systems across multiple District-owned facilities.[3] The program has created more than 300 jobs and employed dozens of local companies throughout its implementation.[1]

Benefits and Impacts

The initiative is expected to avoid 350,000 metric tons of CO2 emissions over 20 years.[1] Economic benefits total $40.2 million in projected savings, with $25 million attributed to solar PV installations and $15.2 million from cool roof implementations.[1] Beyond emissions reductions and cost savings, the program has generated substantial employment impacts, creating more than 300 jobs while engaging dozens of local companies in the installation and maintenance work.[1]

Climate Adaptation Relevance

This approach directly addresses Washington, D.C.'s four identified local climate change-related challenges: extreme heat events, extreme precipitation, sea-level rise, and storm surge.[1] The multi-technology strategy combines emissions mitigation with adaptation measures, using cool roofs to reduce urban heat island effects during extreme heat events while green roofs manage stormwater during extreme precipitation events.[1]

Business Analysis

The program demonstrates a compelling financial model with $40.2 million in projected savings distributed across solar PV installations ($25 million) and cool roof implementations ($15.2 million).[1] The initiative has stimulated local economic development by creating more than 300 jobs and contracting with dozens of local companies for installation and maintenance services.[1] The municipal implementation model leverages District-owned property assets, with DGS managing the ongoing portfolio of green roofs and other roof technologies across various facilities.[3] The proprietary systems deployed by Furbish Company, LLC, including EcoCline® and SmartSlope® technologies, represent specialized market solutions within the green infrastructure sector.[3]

Sources