Green Roof Weight

The initial expense of green rooftops often turns away prospective clients.

Green roof weight.

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. The thickness of the drainage layer will depend on the roof structure and the water storage capacity required depending on the. Perennials and low shrubs up to 1 5 m. Green roof vegetation type.

Medium trees up to 10 m. Shrubs up to 3 m. Because green roofs require professional design careful structural analysis and multiple layers and systems even extensive green roofs usually start at 8 per square foot significantly more expensive than the 1 25 per square foot for built up roofs burs source. 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.

Substrate roll is a lightweight green roof substrate manufactured from long mineral wool fibres. If you re looking for a lighter option to green roof enviromat green roof is lighter in weight than a wildflower roof. Weight loading kg m 2 low herbaceous succulents and grasses 10 2. What contributes to green roof weight.

This is because we use specially engineered blankets for water management and the plant species used in the matting are very shallow rooted. 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. It is a good growing medium and ensures good water absorption and tenacity. Roofs with vegetation blankets consisting of herbs grasses wild flowers or host and nectar plants require a thicker substrate layer than a vegetation blanket consisting of only sedum plants.

Green roofs require significantly more maintenance and maintenance energy compared to a standard roof. Large trees up to 15 m. 3 drainage including filterfleece 11 20 mm. Green roof system weights columbia green technologies 79 se taylor st.

Green roof system structure. Small trees up to 6 m. As such they don t require such deep soils or growing media. The weight of a green roof caused the collapse of a large sports hall roof in hong kong in 2016.