Survey Finds Most Facility Managers Miss the Boat on Green Roofs

In a recent online survey conducted by Weston Solutions a leading consumer-focused manufacturer the majority of more than 2500 facility managers across the U.S. were not well-versed on what green roofs are and how they can benefit buildings companies and the environment.

In some cases respondents were simply wrong about what green roofs do. For instance when asked what impact the vegetation on a green roof has on air quality nearly 70 percent indicated that it helps filter dust and dust particulates from the air which studies show is incorrect. and about 7 percent responded that green roofs actually harm indoor air quality. On the contrary like most vegetation the plants on a Green roof absorb pollutants from the air and release oxygen.

Asked how green roofs affect outdoor air temperatures 17 percent of repondents said they have little or no effect. But one of the most significant proven benefits of green roof systems is that they help reduce the “urban heat island” effect -- the reason inner cities and large downtown areas are considerably warmer than outlying forested areas.

Among the other responses to the survey: Forty-one percent thought the most significant benefit of a Green roof is energy savings. Although they do help “insulate” a facility which does reduce energy costs the key benefit of a Green roof is their ability to reduce stormwater runoff. As to costs more than 70 percent of the respondents were aware that a modular Green roof where plants are preplanted in modules that are placed atop the existing roof tends to be less expensive than a built-in-place system constructed directly on the roof. Nearly 60 percent of the respondents believed a Green roof increases the value of a property whereas about 40 percent believed the technology is too new to affect property values. Green roofs are recognized as a property improvement and can increase property values.

Similarly only 30 percent believed a Green roof increases the life cycle of the existing roof while the other respondents believed it has little impact. In actuality studies find that Green roofs can double the life expectancy of the existing roof. Less than a third of the respondents knew that a Green roof can contribute seven points or more toward LEED certification. Most of the other respondents believed it was five points or less or that it was not part of the LEED accreditation evaluation.

Finally the facility managers were asked what U.S. city has the most Green roofs installed. Most respondents were sure it was either Portland Oregon or Seattle Washington. However the city with the most Green roofs installed by a fairly wide margin is Chicago. With two million square feet of Green roofs installed including one on their City Hall it appears Chicago may have to do a bit more boasting about how Green the city is becoming.