What contributes to green roof weight.
Minimum weight of green roof.
It is a good growing medium and ensures good water absorption and tenacity.
Intensive roofs which are thicker with a minimum depth of 12 8 cm 5 1 16 in and can support a wider variety of plants but are heavier and require more maintenance and extensive roofs which are shallow ranging in depth from 2 cm 13 16 in to 12 7 cm 5 in lighter than intensive green roofs.
The two key elements that contribute to weight are the density of the different layers that make up the green roof and how heavy it becomes as a result of rain absorption.
Sedum vegetation blanket instantly providing at least 90 coverage on an extensive green 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 loading kg m 2 low herbaceous succulents and grasses 10 2.
3 drainage including filterfleece 11 20 mm.
Green roof system weights columbia green technologies 79 se taylor st.
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.
There are two types of green roof.
Saturated with water the weight can increase by as much as 35 to around 100 to 110 pounds per cubic foot.
Perennials and low shrubs up to 1 5 m.
1 xf301 sedum blanket system with integrated water retention and filter layer.
Substrate roll is a lightweight green roof substrate manufactured from long mineral wool fibres.
Shrubs up to 3 m.
Small trees up to 6 m.
40mm high perforated edge drainage trim for bauder sedum blanket.
The company s website lists weights from about 18 psf to a little over 45 50 psf or so.
Structural loads weight of green rooftops.
For example a traditional intensive green roof system for plants and grass featuring at least six layers including soil filter fleece drainage layer and vegetation is.
Medium trees up to 10 m.
2 al40 edge trim frames and retains the xf301 system.
When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.
Green roof vegetation type.
The type of green roof in question is engineered to be light and doesn t have typical soil with plants see link above.
The thickness of the drainage layer will depend on the roof structure and the water storage capacity required depending on the.
One cubic foot of dry agricultural dirt or loam typically used for a green roof weighs between 75 and 81 pounds.
