How Much Does A Green Roof Weigh

Typically a basic lightweight green roof will weigh between 60 to 150 kg per square metre which will increase when saturated with rain or snow.

How much does a green roof weigh. The weight of a green roof depends on the materials used and type of system installed. Heavier intensive green roofs generally require a concrete supporting deck. Biodiverse green roofs are low maintenance roofs designed to create or replace natural habitats. 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.

Mid range 5 inch systems weigh approximately 34 pounds per square foot and are compatible with wood or steel decks. Holds up to 9 litres of water per square metre so saturated weight is 9kg m2. Naturally if building owners introduce plants grass. How much does a green roof weigh.

How much does a green roof cost. The weight of a green roof will depend on the total structure of the green roof system. As a guide prices can vary from 50 m for a sedum roof to 200 m for a fully planted intensive roof the cost of any reinforcement needed to the roof and or wall structures is additional to this. The cost will vary with the green roof system and the particular situation.

A traditional green roof with soil substrates are usually designed with plugs cuttings or seeds which consequently require much care and attention in first years to reach good green coverage and diverse vegetation. Green roof system weights columbia green technologies 79 se taylor st. For more in depth information the astm standards e2397 and e2399 has published specific protocols for determining the weight and dead load of green. The soil depth of an intensive green roof typically ranges from 12 36 in.

A flat roof built using the enviromat green roof system will weigh the following. Check that there are no areas of damp rotting wood. This increases dramatically the cost in comparison to prevegetated green roofs. When preparing a green roof calculations must always be based on the water saturated weight of the total structure.

The weight of biodiverse green roofs varies according to the needs of the plant species required. An intensive green roof is the most expensive but also has the highest capability to mitigate stormwater runoff and insulate a building. How does weight impact on initial maintenance. 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.