Home & garden

Create a roof garden - you should pay attention to this


A roof garden, as its name suggests, is a garden that is built on a stable residential building. Read here how you can create a roof garden.

Roof garden with tub plants

You need a building permit

If you want to create a roof garden, you need a building permit. A roof garden must also have a direct irrigation system. Problems are usually caused by the correct construction of a roof garden, in order to then be able to ensure that the plants are irrigated over a large area and at the same time to achieve optimal thermal insulation for the residential building. Why a roof garden is always built up in several layers.

Layer structure of a roof garden

First layer:
The first layer is also considered the most important layer of a roof garden. It serves as a seal and therefore represents an absolutely watertight protection for the residential building. At the same time, however, it also ensures optimal thermal insulation and is therefore considered a positive insulation measure for the roof. The use of weldable bitumen sheets, root-proof roof garden tarpaulins made of plastic and the like is suitable for this. A wide range of products are available for this purpose from specialist retailers, which certainly always require a specialist discussion before use.

Second layer:
A drainage layer is then planned on the roof garden so that excess water can be removed from the roof via drainage pipes. Pipe laying mostly leads from the roof towards the ground or sewer system. It is important that the drain pipes cannot become blocked by garden waste, e.g. Leaves.

Third layer:
Finally, earth is spread out on the layers, which can not only compensate for unevenness in the roof, but could also deliberately form unevenness.

" Tip:
The layer structure of a roof garden should always be carried out by a suitable specialist company due to mostly inadequate specialist knowledge.

Planting the roof garden

Once the layer structure has been successfully completed, you can start planting a roof garden. It should be borne in mind that every plant on a roof always needs artificial irrigation. For this reason, easy-care, extremely robust plants that require little water, such as e.g. Boxwood, ivy, firethorn, some types of roses, butterfly bush, bamboo, mahonia, etc.

" Tip:
At the same time, roof plants should always be extremely hardy!

When planting, you must also take into account that the roof garden is always under the influence of the wind. Why not only wind-insensitive plants should be used, but also garden utensils (e.g. garden lighting, pergola, plant plugs, etc.) either have to be attached well or not used entirely for a roof garden.

Alternative roof garden

Alternatively, a roof garden can also be equipped with potted plants. The roof garden itself is laid with natural stones or a wooden terrace and then very stable container plants are decoratively arranged on it.

" Tip:
Always use planters that have an integrated sewage system. In this way, the roof garden is not accidentally flooded.

The advantage of container plants is that many flowering ornamental plants, such as Oleanders and trumpet tree can find their place on the roof. However, they must be kept in frost-protected rooms in the winter months.