Extensive Green Roof System Weight

Extensive modular green roofs.

Extensive green roof system weight.

35 80 lbs ft. 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. Intensive green roofs. A shallow layer of growing medium supports low growing stress tolerant plants that can generally look after themselves.

Green roof system weights columbia green technologies 79 se taylor st. 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. O verall depth 3 5 inches.

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. 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. 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. Extensive roofs are typically lightweight and can be installed over a variety of structures including metal roof decks.

Extensive green roofs sedum roof systems. 15 to 50 per square foot. 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. Selected perennials sedums ornamental grasses herbs and little shrubs.

15 25 lbs ft. For a conventional roof. 25 40 lbs ft. What contributes to green roof weight.

The biggest benefit of extensive green roofs is that they need very little maintenance. Here s a summary of the different types of green roof available. Extensive green roofs are designed to reap the benefit that green roofs offer at minimal cost and with very little maintenance. Further on the urbanscape green roof system can also be much thinner even more decreasing the weight than traditional green roof system.

8 to 20 per square foot. There are two variations for the system build up. 7 24 inches. Extensive green roofs are designed to be low maintenance lightweight systems with no general access.