15 to 50 per square foot.
Green roof self weight.
A 2006 study by the university of michigan comparing costs of conventional and green roofs showed that on average installing a green roof costs about 22 00 sq.
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.
The green roof concept has seen wide spread acceptance within the construction community.
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.
0 80 mm steel sheet.
For a conventional roof.
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.
Weight of roofing materials.
Green roof vegetation weight loadings.
8 to 20 per square foot.
Medium trees up to 10 m.
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 following table provides typical weights dead load self weight for various roofing materials.
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.
Shrubs up to 3 m.
Green roof vegetation type.
2 al40 edge trim frames and retains the xf301 system.
Small trees up to 6 m.
Perennials and low shrubs up to 1 5 m.
The intention of the green roof concept is to take otherwise heat producing areas such as rooftops and plazas and provide a cooler environment.
Where possible the values were taken directly from manufacturer technical data sheets and are the actual weights of specific representative products.
1 xf301 sedum blanket system with integrated water retention and filter layer.
The weight of roofing constructions above the truss rafter may be estimated with the calculator below.
Sedum vegetation blanket instantly providing at least 90 coverage on an extensive green roof.
Last updated july 22 2020.
40mm high perforated edge drainage trim for bauder sedum blanket.
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.
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.
