As such you may want to consider strengthening the walls of your structure and the roof deck before installing the green roof.
Green roof weight per square metre.
Medium trees up to 10 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.
Shrubs up to 3 m.
Green roof vegetation type.
Typically a basic lightweight green roof will weigh between 60 to 150 kg per square.
You can plant plants that have a shallow root system on these roofs.
Extensive green roofs on the other hand have a shallow soil of 200mm thick.
Perennials and low shrubs up to 1 5 m.
Large trees up to 15 m.
If necessary this weight can be reduced to approximately 40 kg m for roofs that can only bear a lightweight green roof system.
In addition the weight also depends on the water buffering capacity of the drainage layer.
Before you begin you need to make sure that your existing shed roof is strong enough to take any extra weight.
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.
A standard sedum roof has a saturated weight of about 80 kg m.
Small trees up to 6 m.
Green roof vegetation weight loadings.
The thicker the substrate layer the greater the weight of the total roof structure.
Such facilities include different types of plants with the shallow root system.
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.
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.
Xeroflor s green roof options include a range of lightweight systems weighing only 8 10 pounds per square foot to ballast applications of 25 pounds per square foot.
