The substrate blocks the lower frequencies while the plants absorb the higher frequencies.
Sedum roof insulation.
Sedum is a lightweight method to create a green roof thanks to the modest substrate layer depth.
Sedum plants come in many colours and varieties so it is possible to design s edum mats blankets sedum walls or modules such as the s pod some times called the sedum tray green roof tray or modular system the s pod tailored to your needs or that of the environment.
The combination of substrate plants and the embedded air in the green roof system provide good sound insulation.
Sound waves are absorbed and reflected.
Sedum can withstand drought for example in very hot summers.
In addition to thermal insulation a green roof also has a sound insulating effect.
Sedum has very shallow roots a key requirement for an extensive green roof considering the modest depth of the substrate layer.
A sedum green roof is not quite as good an insulator as a wildflower green roof.
However there s a compromise here.
Key considerations when designing green roofs include overall weight of the system to ensure it can be supported by the roof structure in addition.
And reduce heat loss due to wind by up to 50 compared to a bare roof.
Deep layers of substrate growing medium are extremely heavy.
It can also raise the outside temperature of the roof on average by 4 5 c when the weather is cold.
Sedum roofs are lined with plant life rather than traditional roofing materials.
During the winter months it is possible to gain up to an extra 25 insulation in dry conditions by installing a green roof.
These materials are covered by a waterproofing membrane which prevents moisture from entering the structure.