Varied building systems have been developed to support vegetative covers on steeply pitched roofs.
Extensive roof garden.
Another term for these green roofs is rooftop garden.
Extensive and semi extensive roof gardens have a thin growing medium 200mm deep planted with predominantly native vegetation.
Outside melbourne recycled concrete or clinker ash are used to replace scoria the weight is similar.
Pitched roof systems sometimes merge into vertical facade vegetative techniques.
It is typically not designed for public access or recreational use and access is strictly for periodic maintenance.
Given those advantages only the extensive green roof will be discussed here.
A semi intensive green roof can give rise to a richer ecology with more diverse plant and animal species.
Typically they have thin layers of substrate the growing medium to keep depth and weight to a minimum.
An extensive garden roof assembly can be applied to flat roofs and sloping roofs with a pitch of up to 12 12 or 45 provided the appropriate measures are taken to cope with the shear forces and soil retention.
Extensive green roofs are designed to be low maintenance lightweight systems with no general access.
Saturated weight guide extensive roof garden 140mm to 200mm 20mm scoria or recycled stone mulch nb.
Greening the built environment fytogreen australia s lightweight extensive roof garden system.
With a thinner vegetation support layer green roofs are lightweight compared to roof gardens.
Fytogreen designs roof gardens specifically to suit the site conditions inclusive of weight and set down limitations.
Extensive roofs are typically lightweight and can be installed over a variety of structures including metal roof decks.
To install extensive vegetative roof covers on pitches steeper than 2 5 12 12 degrees supplemental measures will be required to prevent sliding instability.
The extensive type of green roof by contrast have a soil depth of 50 150mm only support very drought tolerant plants no irrigation are too harsh an environment for most common weeds and so require very little maintenance.
A green roof involves the extensive greening of rooftop surfaces.
An extensive garden roof assembly can be applied to flat roofs and sloping roofs with a pitch of up to 12 12 45 provided the appropriate measures are taken to cope with the shear forces and soil retention.
This deeper soil allows intensive roofs to accommodate large plants and dramatic plant groupings.
Typically these roofs will have more soil and some small shrubs as well as the low growing wildflowers and sedums found on an extensive roof.
It also allows for a formal garden to be installed with paths grass lawn and flowers or pot plants.
The intensive green roof uses planting mediums that have greater depth than the extensive green roof.
Extensive green roofs sedum roof systems.
