Extensive green roofs are constructed using shallow depths of growing mediums known as substrates and vegetated with low maintenance plants.
Sedum green roof weight.
The option to specify a substrate system allows for a wider variety of vegetation to be chosen.
Weight of standard sedum roof.
As such you may want to consider strengthening the walls of your structure and the roof deck before installing the green roof.
6 media depth 24 29 lbs ft2 39 46 lbs ft2.
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.
It comprises mature sedum on 20mm of extensive substrate and incorporating a multifunctional water retention and filter layer.
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.
Typically the total depth of the green roof would be 85 100mm 12 20mm drainage layer 70mm of substrate and have a saturated weight of approx.
In addition the weight also depends on the water buffering capacity of the drainage layer.
If necessary this weight can be reduced to approximately 40 kg m for roofs that can only bear a lightweight green roof system.
5 media depth 17 22lbs ft2 31 37 lbs ft2.
75 drainage layer 5 water retention layer includes 2 lbs s f.
The thicker the substrate layer the greater the weight of the total roof structure.
Utilizing ecogrid sedum tray technology and our specialized light weight green roof soil mixtures landtech soils hope to be someday recognised as supplying the best green living roofs in the.
Plant material weight plugs or small containers system depth dry weight saturated weight.
Xf301 sedum blanket extensive green roof system when to specify.
So in dry state 50 m2 traditional green roof weighs around 5 tons while a similar sized urbanscape roof weighs just 1 ton.
A standard sedum roof has a saturated weight of about 80 kg m.
Layered system semi intensive growing media.
Lightweight low maintenance extensive green roofs.
Scale this up and a 1 000 m2 traditional green roof space requires 100 tons of material to be brought on the roof and the urbanscape version only 20 tons and can be called a light weight green roof.
Key features extensive sedum green roofs utilise drought tolerant plant species which are typically sedum species.
This is the lightest weight all in one system available.
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.
