Extensive Green Roofing

Extensive Green Roofing

In Partnership With Zinco

Extensive landscaped roofs are an ecological alternative for conventional surfaces like gravel roofs and their installation and maintenance costs are only marginally higher. Suitable plants include types of moss, Sedum species, herbs and some grasses. Once installed and planted, the roof will look after itself and will only require inspection and maintenance once or twice a year.

Sedum Carpet – the Time-tested Ecological Protection Layer

“Sedum Carpet” is a low, ground-covering, extensive green roof vegetation, which, in the appropriate climate, can be set on a substrate layer of approx. 60 mm. The “Sedum Carpet” is largely used in cases where a low weight and low maintenance costs are stipulated. The various low-growing Sedum species belonging to the “Sedum Carpet” plant community are spread as shoots, or applied as plants with small root balls. The main flowering season of the “Sedum Carpet” is in early summer and the dominating colours are yellow and red/white.

Technical Data*

Build-up height
ca. 90 mm

Weight, saturated
ca. 95 kg/m2

Water retention capacity
ca. 25 l/m2

Rockery Type Plants – the Species-rich Extensive Green Roof Variant With Multiple Design Possibilities

In the “Rockery Type Plants” community, the different low-growing Sedum species mainly serve as ground cover. With the additional higher growing perennial plants, an extensive green roof with a creative design and an individual character can be developed. The bright blooming ‘Dianthus’ species, like the Clusterhead Pink, with a growth height of up to 400 mm, act as flowering eye-catchers from spring through to autumn. The “Rockery Type Plants” system and the plant community of the same name stand out due to the fact that, once they have been rooted, only very little maintenance work is required.

Technical Data*

Build-up height
ca. 100 mm

Weight, saturated
ca. 110 kg/m2

Water retention capacity
ca. 36 l/m2

Green Pitched Roof with Gradients up to 20°

Extensive landscaping is most often used on flat roofs but it can also be applied on sloping roofs. However, for gradients of more than 10° the build-up of layers must be modified to suit the different conditions. The force-relieving Floraset® FS 75 elements, a mat with higher water retention levels and a Jute anti-erosion net are all used in this case.

Technical Data*

Build-up height
ca. 130-150 mm

Weight, saturated
ca. 115-145 kg/m2

Water retention capacity
ca. 38-44 l/m2

Green Pitched Roof with Gradients up to 35°

The ZinCo Georaster® elements provide roofs which have a gradient of over 25° with a safe and long-lasting landscaping solution with effective force-relief. Thanks to their small size, they leave a relatively large area, which is suitable for rooted plants. The choice of plants must, of course, fit the extreme location: the south-side will feature high levels of solar radiation and the rainwater will drain off quickly.

Technical Data*

Build-up height
from 120 mm

Weight, saturated
from 155 kg/m2

Water retention capacity
from 64 l/m2

*The values are typical for Central Europe and vary depending on the actual building and the location.

The future of building is Green!