Annual and biennial plants.
Vegetation layer green roof.
This will differ depending on the vegetation planted.
Pebbles can be used to keep the outlets clear.
You can add a layer of stones or rocks to avoid blockages or use them around the edges of the roof to stay clear of unwanted vegetation in that area.
They fall into three main categories extensive intensive and semi intensive.
Examples of extensive green roofs produced by vegetal i d.
A range of annual and biennial plants can be used successfully on green roofs and tend to fall into two distinct groups.
Green roofs are also known as vegetative or eco roofs.
We have chosen to use the word vegetative rather than the word green in this guide because a non vegetative roof could be considered to be environmentally green without being vegetative.
A semi intensive green roof has a thicker layer of growing medium in order to broaden the range of plants but involves more maintenance and irrigation systems are sometimes essential.
It also has plants and the like on top.
They can become excessively dominant and damage green roof profile layers.
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.
Container gardens on roofs where plants are maintained in pots are not generally considered to be true green roofs although.
Vegetative roofs also known as green roofs are thin layers of living vegetation installed on top of conventional flat or sloping roofs.
Some caution is needed in the use of plants with vigorous rhizomes or stolons such as some bamboo species.
The components of a green roof.
For diy green roofs the depth of the substrate is 70 200 mm.
A green roof or living roof is a roof of a building that is partially or completely covered with vegetation and a growing medium planted over a waterproofing membrane it may also include additional layers such as a root barrier and drainage and irrigation systems.
In short a green roof is made to purposely grow grass.