In Chicago, it's a turf war over rooftop greens

10/23/2009 | Chicago Tribune (tiered subscription model)

Increased interest in rooftop gardens has pitted commercial landscapers and roofing contractors against one another. Unions that represent each group took the dispute to the National Labor Relations Board. The roofing contractors want more of the work that has gone to the landscapers. The roofers contend they are experienced with all types of roof systems and that no real horticultural skill is required for green roofs.

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