How Much Does A Green Roof Weigh

The weight of a green roof depends on the materials used and type of system installed.

How much does a green roof weigh.

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. Green roof system weights columbia green technologies 79 se taylor st. When preparing a green roof calculations must always be based on the water saturated weight of the total structure. The cost will vary with the green roof system and the particular situation.

A flat roof built using the enviromat green roof system will weigh the following. How does weight impact on initial maintenance. Holds up to 9 litres of water per square metre so saturated weight is 9kg m2. The soil depth of an intensive green roof typically ranges from 12 36 in.

The weight of biodiverse green roofs varies according to the needs of the plant species required. They can be specified to meet local biodiversity action plans or to support specific flora and fauna including bats bees butterflies birds and so on. The weight of a green roof will depend on the total structure of the green roof system. Weight is negligible water retention mat.

Mid range 5 inch systems weigh approximately 34 pounds per square foot and are compatible with wood or steel decks. Biodiverse green roofs are low maintenance roofs designed to create or replace natural habitats. 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. This increases dramatically the cost in comparison to prevegetated green roofs.

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. Heavier intensive green roofs generally require a concrete supporting deck. Check that there are no areas of damp rotting wood. 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.

An intensive green roof is the most expensive but also has the highest capability to mitigate stormwater runoff and insulate a building. How much does a green roof cost. How much does a green roof weigh. For more in depth information the astm standards e2397 and e2399 has published specific protocols for determining the weight and dead load of green.