Extensive Green Roof System Weight

An extensive garden roof assembly can be applied to flat roofs and sloping roofs with a pitch of up to 12 12 or 45 provided the appropriate measures are taken to cope with the shear forces and soil retention.

Extensive green roof system weight.

There are two variations for the system build up. Here s a summary of the different types of green roof available. 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. For a conventional roof.

Intensive green roofs. Extensive systems weigh anywhere from 10 to 25 pounds per square foot when dry which is why the interlocking system of trays is important otherwise strong winds could very easily blow the plantings away. The biggest benefit of extensive green roofs is that they need very little maintenance. 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.

15 25 lbs ft. 8 to 20 per square foot. 7 24 inches. What contributes to green roof weight.

Smaller thickness of the system will not compromise the performance due to the fact that urbanscape green roll can hold up to 3 4 times more water per its volume than other green roof substrates. O verall depth 3 5 inches. Extensive green roofs are designed to reap the benefit that green roofs offer at minimal cost and with very little maintenance. 15 to 50 per square foot.

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. A shallow layer of growing medium supports low growing stress tolerant plants that can generally look after themselves. Sedum roofs are extensive green roofs that have a media depth of 3 8 inches.

Extensive modular green roofs. Extensive roofs are typically lightweight and can be installed over a variety of structures including metal roof decks. 35 80 lbs ft. Extensive green roofs sedum roof systems.

Selected perennials sedums ornamental grasses herbs and little shrubs. Mosses sedums succulents herbs and few grasses. Typically they have thin layers of substrate the growing medium to keep depth and weight to a minimum. Green roof system weights columbia green technologies 79 se taylor st.