15 to 50 per square foot.
Green roof self weight.
Large trees up to 15 m.
You can retrofit a green roof but in these cases you may need to use a much lighter weight green roof system a sedum layer with a light soil is a good solution.
2 al40 edge trim frames and retains the xf301 system.
Medium trees up to 10 m.
Sedum vegetation blanket instantly providing at least 90 coverage on an extensive green roof.
Weight loading kg m 2 low herbaceous succulents and grasses 10 2.
Green roof vegetation weight loadings.
Weight of roofing materials.
The result is a cooler roof decreasing the buildings energy consumption and reducing the heat island effect.
1 xf301 sedum blanket system with integrated water retention and filter layer.
For a conventional roof.
Green roofs can help reduce energy costs for a building by acting as another layer of insulation between the inside and outside of the roof.
The intention of the green roof concept is to take otherwise heat producing areas such as rooftops and plazas and provide a cooler environment.
The weight of roofing constructions above the truss rafter may be estimated with the calculator below.
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.
The main thing is to speak to a structural engineer to know if the roof can support the weight of the green layer because once it s absorbed rainwater it can get very heavy.
None asphalt roll roofing 1 1 lb m ft 2 5 4 kg m 2 asphalt shingle or asphalt fiberglass composite shingle 2 7 lb m ft 2 13 2 kg m 2.
0 80 mm steel sheet.
The following table provides typical weights dead load self weight for various roofing materials.
Where possible the values were taken directly from manufacturer technical data sheets and are the actual weights of specific representative products.
Last updated july 22 2020.
The green roof concept has seen wide spread acceptance within the construction community.
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.
Perennials and low shrubs up to 1 5 m.
Green roof vegetation type.
This is most noticeable in intensive green roofs since there is a thicker and more consistent layer of soil which provides a higher insulating value.
Shrubs up to 3 m.
Small trees up to 6 m.
