Green Roof Weight

Green roofs require significantly more maintenance and maintenance energy compared to a standard roof.

Green roof weight. Green roof vegetation type. The weight of a green roof caused the collapse of a large sports hall roof in hong kong in 2016. 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. The thickness of the drainage layer will depend on the roof structure and the water storage capacity required depending on the.

When preparing a green roof calculations must always be based on the water saturated weight of the total structure. Perennials and low shrubs up to 1 5 m. As such they don t require such deep soils or growing media. 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.

This is because we use specially engineered blankets for water management and the plant species used in the matting are very shallow rooted. 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. Small trees up to 6 m. It is a good growing medium and ensures good water absorption and tenacity.

Large trees up to 15 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. Green roof system structure. If you re looking for a lighter option to green roof enviromat green roof is lighter in weight than a wildflower roof.

The initial expense of green rooftops often turns away prospective clients. What contributes to green roof weight. Shrubs up to 3 m. Weight loading kg m 2 low herbaceous succulents and grasses 10 2.

In the wake of the disaster numerous other green roofs around the territory were removed. 3 drainage including filterfleece 11 20 mm. 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. 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.