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City Roofs Going Green

A $1.3 million "green roof" has been developed atop the 10-story Romano L. Mazzoli Federal Building In Louisville, Kentucky. At nearly 27,000 square feet, it is the largest environmentally friendly roof in Louisville, city officials said. The roof is accompanied by conservation measures newly installed in the building's 1.3-acre parking lot, an effort that cost $250,000 and was paid for by the Metropolitan Sewer District.
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The green roof "will reduce heat loss, absorb storm water runoff and is nice to look at," Mayor Greg Fischer said at the ceremony in front of the New Federal Building.

With numerous roof and other "greening" projects completed, "you guys are already at the forefront" in sustainability efforts, said Shyam Reddy, the Region 4 administrator of the General Services Administration, which paid for the roof project with federal economic-stimulus act funding.

The federal structure's old pitch roof was badly deteriorated, Reddy noted. It was replaced with a new asphalt primer base that was overlain with a special absorbent soil.

The result is that the roof helps reduce the surrounding air temperature, helping it retain heat in winter, help cool the building in summer, absorb rainfall, save energy and, in the long run, Reddy noted.

Wesley Syndor, the MSD project manager for the parking lot project, said the work included installing permeable pavers and putting down a special absorbent type soil in the landscaping.

Hospital Green Roof
In Appleton, Wisconsin, Elizabeth Hospital received a new energy efficient green roof. It's called a "live roof" and it's the second such roof to be built at St. Elizabeth Hospital in Appleton. Plants are installed to help block the sun and keep the building cool, while also limiting rain runoff. However, officials say the design also provides a nice window view for those in the hospital.

"Spring will be one color, summer will be another color and fall will be a third color, and we actually have some ways and certain different patterns designed in the roof structure in the roof itself," said Todd Paider, project manager with Boldt Company. Officials say the roof was built with extra supports to hold the weight of the plants and snow in winter.

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October 23, 2019, 9:59 pm PDT

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