Green Roof Airation Layer

They can also provide additional functions for the green roof other than just drainage.

Green roof airation layer.

Root barrier the root barrier is the system that avoids the membrane underneath from being pierced and penetrated by roots ensuring that the system can remain in top shape for as long as it possibly can without needing any adjustments or changes. The rock aggregate should also have a suitable ph and be low in soluble salts to ensure plant growth is not adversely affected. The most common root barriers used are thin polyethylene sheets laid over the waterproofing membrane. Additional green roof layers.

What is a green roof. Drainage protection filtration layer it is used for lightweight green roofs terraces and has many functions. Protection drainage and filtration. Of course this is not all that.

They fall into three main categories extensive intensive and semi intensive. To assist in excess water drainage rubber or plastic modeled drainage elements are often included in this layer. It is made of a filtration veil and the polyamide monofilament fibre network layer. Also the green roof drainage layer material is made to be sturdy and strong so that piercing can be limited and that the integrity of the entire program can be retained with ease.

Although there are no precise definitions of them an extensive green roof has a shallow growing medium usually less than six inches with a modest roof load limited plant diversity minimal. Older green roofs often used a permeable layer of rock aggregate such as scoria or gravel for drainage. A green roof is a layer of vegetation planted over a waterproofing system that is installed on top of a flat or slightly sloped roof. Green roofs are also known as vegetative or eco roofs.

The clay and silt content of materials used in a rock aggregate drainage layer should be 10 per cent by mass. These may not be required if the waterproof membrane is certified as root resistant.