Green roof for the garage

Extensive versus intensive green roofs

In principle, there are two different types of Green roof differentiated. For extensive green roofs, layers with a thickness of 6 to 20 cm are used, while for intensive green roofs, layers of up to 40 cm are applied to the roof. This has two consequences: On the one hand, with intensive green roofs, significantly taller plants (even small trees) can be planted, the roots of which extend deeper and thus need more soil, on the other hand, this - and the size of the plants - results in a significantly higher weight, up to 1000 or more kilograms per square meter.
Since a garage roof is usually not designed for such a weight, you should rather use an extensive variant of the roof greening of your garage. These are also significantly cheaper.

What does a green roof cost for a garage?

You can find several complete packages on the Internet that contain all the material you need for your green roof and thus make it easy to build your own. The prices for such complete sets range from 40 to 69 € per square meter. You can get the exact prices of different providers

in this in-house journal article Read about the roof greening of carports. In the following table we assume an average price of 50 € per square meter and use this average to calculate the costs for green roofs of different sized garages. For the calculation of the area in square meters, it was rounded up, since you cannot buy half a square meter in online shops, only complete ones.