It is common practice to use the term extensive to describe green roofs that are very thin and will only support hardy drought resistant vegetation such as sedums herbs and perennials.
Green roof soil thickness.
This is especially true of intensive green roofs which can have soil that is two feet deep or more.
There are a number of things to consider when designing for a green roof.
Soil structure for green roof media.
The nominal thickness of a green roof is the approximate total height of the soil and drainage components that constitute the green roof system excluding the roof structure insulation waterproofing and plants.
This is because they provide ecological benefits aesthetic value and creative urban architecture.
One important item to design for is an increased structural load.
The green roof drainage layer thickness makes sure that nothing can go wrong below offering a solid and effective guard.
Intensive to describe green roofs that are thick enough.
Green roofs or living roofs have become popular over the years.