Extensive Green Roof System

Green roofs are also known as vegetative or eco roofs.

Extensive green roof system.

For architects and specifiers looking to earn points in building rating systems such as breeam leed dgnb or hqe this epd can now provide points for categories such as product disclosure. Extensive green roof an extensive green roof system is characterized of its vegetation ranging from sedums to small grasses herbs and flowering herbaceous plants which need little maintenance and no permanent irrigation system the growing medium depth for an extensive green roof system is typically 6 inches or less. The biggest benefit of extensive green roofs is that they need very little maintenance. 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.

A green roof is a layer of vegetation planted over a waterproofing system that is installed on top of a flat or slightly sloped roof. Typically they have thin layers of substrate the growing medium to keep depth and weight to a minimum. They fall into three main categories extensive intensive and semi intensive. A properly designed and installed extensive green roof system can cost 108 248 m 2 10 23 sq ft while an intensive green roof costs 355 2 368 m 2 33 220 sq ft however since most of the materials used to build the green roof can be salvaged it is estimated that the cost of replacing a green roof is generally one third of the initial installation costs.

Extensive green roofs sedum roof systems. Extensive green roofs are designed to be low maintenance lightweight systems with no general access.