Extensive Green Roof Weight

O verall depth 3 5 inches.

Extensive green roof weight.

Selected perennials sedums ornamental grasses herbs and little shrubs. For example a traditional intensive green roof system for plants and grass featuring at least six layers including soil filter fleece drainage layer and vegetation is. There are two variations for the system build up. Mosses sedums succulents herbs and few grasses.

Intensive green roofs are essentially roof gardens and may also need to allow for the additional weight of paving and terracing furniture and even trees. For a conventional roof. Semi intensive green roofs require a deeper soil layer but the payoff is in the types of plantings that can be used. Sedum roofs are extensive green roofs that have a media depth of 3 8 inches.

25 40 lbs ft. 15 to 50 per square foot. 35 80 lbs ft. Intensive green roofs.

An interesting example of an intensive green roof is manaton the award winning private house on dartmoor that uses local meadow grass to blend the family home into the landscape. 7 24 inches. The two key elements that contribute to weight are the density of the different layers that make up the green roof and how heavy it becomes as a result of rain absorption. A 2006 study by the university of michigan comparing costs of conventional and green roofs showed that on average installing a green roof costs about 22 00 sq.

15 25 lbs ft. 8 to 20 per square foot.