hire a pro when using an extensive green roof system
Photo: Bradley Rowe, MSU Green Roof Research Program
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Extensive Roofs

While it might be possible to design your own green roof, it's advisable to hire an architect or landscape professional who has had some experience with green-roof systems. That expert will want to consult with a structural engineer who can advise you as to what kind of system you are installing. "Extensive" systems are the lighter, low-maintenance variety, usually planted with hardy, drought-tolerant perennials such as sedums and other succulents. Because an extensive system requires no watering or special care, it's environmentally preferred.
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