Green roofs have traditionally been categorised as extensive or intensive.
How is a green roof constructed.
It may also include additional layers such as a root barrier and drainage and irrigation systems.
In some areas green roofs are installed just to create a specialized recreation place for local communities it also contributes to the establishment of habitats for various insects and bees as well as birds as they live a difficult life in urban areas.
These components are broadly similar whether it s for a larger commercial intensive roof or a residential green roof.
Note that it is not like a traditional roof garden in which planting is done in free standing containers as well as planters that are placed on an easy to access roof terrace.
It s a case of building up the layers within a green roof system.
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.
All green roofs have a layered structure built upon a roofing base structure.
Chosen plants should be based on the type of roof surrounding climate and condition of the building.
The layered structure may be built on site or arrive at the site in pre constructed modules which are raised to the rooftop and joined together.
Making a green roof is relatively simple.
Basic green roof components include the base roof deck water proofing layer and green roof systems.
The top layer of a green roof consists of vegetation.
Vegetation on green roofs is planted in a growing substrate a specially designed soil substitution medium that may range in depth from 50 mm to more than a metre depending on the weight capacity of the building s roof and the aims of the design.
For flatter roofs and stronger buildings taller and heavier vegetation can be used.
Lighter and shorter vegetation is recommended for slanted roofs.
How to make a green roof.
A green roof is a green space that is created by adding various layers of plants and a growing medium to the top portion of a traditional roofing system.