Baunee states that the design of each roof is unique and the way each is built is contingent on budget constraints and the desired needs of the building owner.
He notes that green roofs help reduce heating and cooling costs, reduce storm water runoff and provide a habitat for wildlife, but they are still rooftops that house essential hardware requiring access for maintenance; to address this concern, rooftop equipment is separated from all vegetation by decorative hardscapes, like rock ballast or other borders to form a no-grow zone.
Baunee adds that choosing the wrong plants for a roof can negate any positive benefits; some plants can die because of drought or heat and wind exposure and force building owners to spend more money to maintain a healthy, growing and functional roof.
According to Baunee, the popularity of green roofs is growing exponentially and as more people become educated on their benefits — not to mention the decisions of some municipalities to make their implementation mandatory — we can expect to see more green roofs sprout up in the immediate future.
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