Green Roof Weight Per Square Metre

You can plant plants that have a shallow root system on these roofs.

Green roof weight per square metre. Weight loading kg m 2 low herbaceous succulents and grasses 10 2. If necessary this weight can be reduced to approximately 40 kg m for roofs that can only bear a lightweight green roof system. 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. 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. In addition the weight also depends on the water buffering capacity of the drainage layer. Green roof vegetation weight loadings. It weighs 60 and 200kg per square metre.

Extensive green roofs on the other hand have a shallow soil of 200mm thick. 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. 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. Green roof vegetation type.

The thicker the substrate layer the greater the weight of the total roof structure. Weight of standard sedum roof. Perennials and low shrubs up to 1 5 m. Shrubs up to 3 m.

Small trees up to 6 m. Before you begin you need to make sure that your existing shed roof is strong enough to take any extra weight. 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. 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.

A standard sedum roof has a saturated weight of about 80 kg m.