A hotel wants to develop a green roof that is easy to maintain. The roof can only support about 20 pounds per square foot. Which is the best type of green roof for their space?

An extensive green roof would be the best option for the hotel as it is lightweight and easy to maintain. Extensive green roofs typically only require minimal maintenance and support low vegetation such as sedums, grasses, and herbs. These roofs are also built on a shallow soil layer, which helps to keep the weight low and reduces the need for additional structural support.