How Much Does A Green Roof Weigh

For example roofmeadow green roofs engineered to be both lightweight and efficient generally weigh about 6 75 pounds per square foot for each inch of media depth.

How much does a green roof weigh. Biodiverse green roofs are low maintenance roofs designed to create or replace natural habitats. The weight of biodiverse green roofs varies according to the needs of the plant species required. 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. A flat roof built using the enviromat green roof system will weigh the following.

And an intensive green roof weighs between 50 300 lbs per square foot. Let s crunch some numbers. 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. System depth dry weight saturated weight 5 25 media depth 17 22 lbs ft 2 29 34 lbs ft 2 6 media depth 19 25 lbs ft 2 33 39 lbs ft 2.

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. When saturated with water in the summertime when the plants are at their biggest and heaviest the mats weigh 40 45kg m2. Weight of standard sedum roof a standard sedum roof has a saturated weight of about 80 kg m. 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.

The cost will vary with the green roof system and the particular situation. How much does a green roof cost. 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. A semi intensive green roof weighs between 30 50 lbs per square foot.

On average an extensive green roof weighs between 10 30 lbs per square foot. So in dry state 50 m2 traditional green roof weighs around 5 tons while a similar sized urbanscape roof weighs just 1 ton scale this up and a 1 000 m2 traditional green roof space requires 100 tons of material to be brought on the roof and the urbanscape version only 20 tons and can be called a light weight green roof. Check that there are no areas of damp rotting wood.