Extensive Green Roof Weight

15 to 50 per square foot.

Extensive green roof weight.

In addition to the mosses grasses and sedum of extensive roofs semi intensive plantings include herbs flowering plants taller grasses and small shrubs. What contributes to green roof weight. 15 25 lbs ft. 35 80 lbs ft.

Selected perennials sedums ornamental grasses herbs and little shrubs. Semi intensive green roofs require a deeper soil layer but the payoff is in the types of plantings that can be used. 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. 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.

Intensive green roofs. Mosses sedums succulents herbs and few grasses. Sedum roofs with a natural drainage layer are designed to maximize water retention while sedum roofs with a synthetic drainage layer may focus more on minimizing weight. 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.

O verall depth 3 5 inches. 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. 25 40 lbs ft. 7 24 inches.

8 to 20 per square foot. Sedum roofs are extensive green roofs that have a media depth of 3 8 inches.