Extensive Green Roof System Weight

35 80 lbs ft.

Extensive green roof system weight. 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. A shallow layer of growing medium supports low growing stress tolerant plants that can generally look after themselves. 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. 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 modular green roofs. O verall depth 3 5 inches. Extensive roofs are typically lightweight and can be installed over a variety of structures including metal roof decks. Extensive green roofs are designed to reap the benefit that green roofs offer at minimal cost and with very little maintenance.

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. 15 25 lbs ft. 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 sedum roof systems. 7 24 inches. 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. Sedum roofs are extensive green roofs that have a media depth of 3 8 inches. 8 to 20 per square foot. Further on the urbanscape green roof system can also be much thinner even more decreasing the weight than traditional green roof system.

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. Intensive green roofs. For a conventional roof. 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.

What contributes to green roof weight. 15 to 50 per square foot. Selected perennials sedums ornamental grasses herbs and little shrubs. Mosses sedums succulents herbs and few grasses.