The basic anatomy of a green roof consists of vegetation growing medium filter membrane drainage layer waterproof root repellant layer roofing membrane support for plantings above thermal insulation vapor control layer and structural roof support.
Parts of a green roof.
It doesn t have to be a traditional garden sprawling and having multiple types of herbs plants flowers or fruits.
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.
However all green roofs include a few important features such as waterproofing and root repellent to keep the underlying structure safe and undamaged.
The green cover may be of herbs grass drought resistant plants flowers and even vegetables.
Usually green roofs have vegetation and plants possibly a garden.
Depending on the type of green roof you install the plants may be modular or have drainage layers.
You may find that your roof deck already has a waterproofing layer after all waterproofing is a key part of protecting the structure.
The green roof can be established on any load bearing components concrete tanbark wood.
Drainage paths provide a way for excess water to reach rainwater drainage devices.
This could be a bitumen membrane or coating asphalt on a shed or some form of liquid waterproofing.
Optigreen extensive roof fertilizer is a slow release fertilizer specifically formulated to meet the nutritional requirement of sedums on extensive green roofs.
A standard green roof comprises of a soil of lightweight mixed together with a layer of you ve reached the end of your free preview.
Extensive green roofs have a minimum layer of substrate.
But they also must create a growing area and potentially provide support irrigation and root protection barriers while staying as light as possible.
Any eco friendly roof can be called green.
The layers of a green roof must like any roof accommodate drainage and protect the building from the elements with a waterproof membrane.
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The most elementary form of such constructions is the extensive planted roofs.
Different types of green roofing.
However the choice of vegetated system must be suitable to load bearing capacity of the building s roof.
Apply it twice yearly beginning the second year typically in april and july at the rate of 4lbs per 1000 square feet.
Two major classes of planted roofs are mainly described intensive and green roof when considering the building attributes the thickness of the layers and the prerequisites for maintenance green roof shufro 2005.
Waterproofing a roof deck for a green roof.
