This lecture was about the benefits of green roofs and how they are classified. Green roofs have many benefits ecological, economical and social. They create biodiversity, and reduce air pollution when placed in urban areas. Green roofs help insulate a building and increase the overall lifetime of a roof. They also collect water. Green roofs provide a place for people to socialize with one and other. A green roof can be transformed into a cafe or be a peaceful place to relax during the day. There are three types of green roofs; a basic green roof, a hybrid and a Roof top garden. The basic green roof is low maintenance, low cost, and does not require gardening. A hybrid roof has some maintenance, the amount of soil used creates a little more weight and watering is necessary to support the plants growing. The Roof top garden is high maintenance, high in cost, and the soil usually means the roof has to be specially designed. The green roof usually only grows things like moss or short grass where as a roof top garden can grow a large variety of vegetation.
Devan
