Green roof vegetation type.
Green roof weight per square metre.
A standard sedum roof has a saturated weight of about 80 kg m.
An interesting example of an intensive green roof is manaton the award winning private house on dartmoor that uses local meadow grass to blend the family home into the landscape.
Extensive green roofs on the other hand have a shallow soil of 200mm thick.
Weight loading kg m 2 low herbaceous succulents and grasses 10 2.
As such you may want to consider strengthening the walls of your structure and the roof deck before installing the green roof.
Large trees up to 15 m.
Shrubs up to 3 m.
Our green roof assemblies can be used in basic flat roof applications as well as more dynamic roof structures even on slopes up to 45 degrees.
In addition the weight also depends on the water buffering capacity of the drainage layer.
The thicker the substrate layer the greater the weight of the total roof structure.
You can plant plants that have a shallow root system on these roofs.
Typically a basic lightweight green roof will weigh between 60 to 150 kg per square.
Intensive green roofs are essentially roof gardens and may also need to allow for the additional weight of paving and terracing furniture and even trees.
Such facilities include different types of plants with the shallow root system.
Before you begin you need to make sure that your existing shed roof is strong enough to take any extra weight.
Green roof vegetation weight loadings.
Medium trees up to 10 m.
You can expect the loading to be upwards of 250kg per square metre which is quite a lot especially if your building is an average garden shed.
Perennials and low shrubs up to 1 5 m.
Weight of standard sedum roof.
Small trees up to 6 m.
