If you re in an area with a lot of humidity and or rain during the growing season you would need a media that dries out fast.
Roof garden layers.
To make this process work various green roof layers are created to give it the most effective and solid chance of being successful.
They fall into three main categories extensive intensive and semi intensive.
It is made of a filtration veil and the polyamide monofilament fibre network layer.
Insulation layer protection layer makes a terrace garden resistant to moisture and temperature fluctuation and provides it sufficient mechanical strength.
Layers of a typical green roof.
In short a green roof is made to purposely grow grass.
Drainage protection filtration layer it is used for lightweight green roofs terraces and has many functions.
Older green roofs often used a permeable layer of rock aggregate such as scoria or gravel for drainage.
Jan 14 2018 experts in thai landscaping and garden design tropical gardens bangkok landscape design and garden construction in thailand.
Protection drainage and filtration.
The rock aggregate should also have a suitable ph and be low in soluble salts to ensure plant growth is not adversely affected.
Unlike conventional earth covered structures garden roof assemblies are lightweight and can be installed on a wide variety of new and existing structures.
It is made mostly of xps extruded polystyrene boards pir panels or polyurethane foam.
With a green roof the plants layer can shield off as much as 87 of solar radiation while a bare roof receives 100 direct exposure.
Bauder sdf drainage layer.
The layers of a green roof are as follows from top to bottom.
When selecting a growing medium for a roof top garden consider average rainfall in the summer months average high and low temperatures during the growing season and the types of plants to be grown and their needs.
Garden roof assembly hydrotech s garden roof assemblies combine the proven performance of our monolithic membrane 6125 roofing waterproofing with proven green technology.
The clay and silt content of materials used in a rock aggregate drainage layer should be 10 per cent by mass.
The layers of a green roof regardless of the depth of growing media soil and plant types used above the underlying architectural elements of most vegetated roof systems are typically the same with each layer playing a crucial role.
The plants that go into a green roof are usually sedum or other shallow rooted plants that will tolerate the hot dry windy conditions that prevail on most rooftop gardens.
