Minimum Weight Of Green Roof

1 xf301 sedum blanket system with integrated water retention and filter layer.

Minimum weight of green roof.

There are two types of 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. The company s website lists weights from about 18 psf to a little over 45 50 psf or so. 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 thickness of the drainage layer will depend on the roof structure and the water storage capacity required depending on the. The type of green roof in question is engineered to be light and doesn t have typical soil with plants see link above. 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. Substrate roll is a lightweight green roof substrate manufactured from long mineral wool fibres.

It is a good growing medium and ensures good water absorption and tenacity. Structural loads weight of green rooftops. 2 al40 edge trim frames and retains the xf301 system. Green roof system weights columbia green technologies 79 se taylor st.

Green roof vegetation weight loadings. Large trees up to 15 m. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary. Medium trees up to 10 m.

Sedum vegetation blanket instantly providing at least 90 coverage on an extensive green roof. Shrubs up to 3 m. Green roof vegetation type. 3 drainage including filterfleece 11 20 mm.

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. 40mm high perforated edge drainage trim for bauder sedum blanket. What contributes to green roof weight. A built up roof for example will typically include the built up membrane itself with or without gravel as well as some kind of insulation and cover board which will vary in thickness from roof to roof.

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. Small trees up to 6 m. Saturated with water the weight can increase by as much as 35 to around 100 to 110 pounds per cubic foot.