Minimum Weight Of Green Roof

40mm high perforated edge drainage trim for bauder sedum blanket.

Minimum weight of green roof.

Green roof vegetation weight loadings. Large trees up to 15 m. Sedum vegetation blanket instantly providing at least 90 coverage on an extensive green roof. Perennials and low shrubs up to 1 5 m.

Small trees up to 6 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. Saturated with water the weight can increase by as much as 35 to around 100 to 110 pounds per cubic foot. When it comes to estimating the weight of an existing roof field verification of the in place construction is necessary.

Substrate roll is a lightweight green roof substrate manufactured from long mineral wool fibres. Green roof system weights columbia green technologies 79 se taylor st. 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. The type of green roof in question is engineered to be light and doesn t have typical soil with plants see link above.

One cubic foot of dry agricultural dirt or loam typically used for a green roof weighs between 75 and 81 pounds. 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. Weight loading kg m 2 low herbaceous succulents and grasses 10 2.

Shrubs up to 3 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. Medium trees up to 10 m. Structural loads weight of green rooftops.

1 xf301 sedum blanket system with integrated water retention and filter layer. 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. 3 drainage including filterfleece 11 20 mm. The thickness of the drainage layer will depend on the roof structure and the water storage capacity required depending on the.

What contributes to green roof weight. The company s website lists weights from about 18 psf to a little over 45 50 psf or so. Green roof vegetation type.