Minimum Weight Of Green Roof

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

Minimum weight of green roof.

Green roof vegetation weight loadings. 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. Large trees up to 15 m. 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.

Green roof system weights columbia green technologies 79 se taylor st. Medium trees up to 10 m. Shrubs up to 3 m. 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. Perennials and low shrubs up to 1 5 m. 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. What contributes to green roof weight.

Weight loading kg m 2 low herbaceous succulents and grasses 10 2. 3 drainage including filterfleece 11 20 mm. It is a good growing medium and ensures good water absorption and tenacity. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.

The company s website lists weights from about 18 psf to a little over 45 50 psf or so. One cubic foot of dry agricultural dirt or loam typically used for a green roof weighs between 75 and 81 pounds. 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 type of green roof in question is engineered to be light and doesn t have typical soil with plants see link above.

There are two types of green roof. Green roof vegetation type. Saturated with water the weight can increase by as much as 35 to around 100 to 110 pounds per cubic foot. Structural loads weight of green rooftops.

2 al40 edge trim frames and retains the xf301 system. The thickness of the drainage layer will depend on the roof structure and the water storage capacity required depending on the. Substrate roll is a lightweight green roof substrate manufactured from long mineral wool fibres.