Roof greening for the garage - not only ecological

Green roofs are often mentioned in connection with ecological building. A green roof on the garage is still more than that. You can read about the types of greenery and the requirements for them in this article.

A green roof doesn't just look good

Green roofs are becoming more common. This is also due to the fact that the municipal authorities are increasingly trying to promote green roofs.

  • Also read - The extensive greening for the roof
  • Also read - The intensive green roof
  • Also read - Extensive green roofs - Costs for the green eco-hood

The flat roof of the garage is of course an ideal place for a green roof. First of all, however, it is important to clarify whether the requirements for intensive or extensive greening are met.

What should be checked

  • The load-bearing capacity of the roof structure
  • the roof seal that is in place and whether additional measures may be required
  • the suitability either for external or for intensive green roofs
  • Location and solar radiation on the roof, weather and climate

Intensive and extensive greening

More than 80% of all green roof areas are extensively greened today. The difference between intensive and extensive greening lies in the structure of the soil.

While extensive greenery only uses a suitable substrate as a base, intensive green roofs have a regular soil structure that also corresponds to the soil in nature.

In this case, the construction of the green areas is not only heavier in terms of weight, but also considerably more complicated and also significantly more expensive, which is why in many cases an intensive construction is dispensed with.

In the case of extensive greening, the main plants used are mosses, succulents and herbs as well as some grasses and occasionally also bulbous plants.

Funding is possible in many areas

Many of the plants with extensive greening store rainwater, which means that the total amount of waste water is significantly reduced due to a high number of green roofs and the sewage systems and the sewage treatment plants are thus significantly relieved.

For this reason, there are subsidies for green roofs from various municipal sources, as well as through the wastewater fees. Overall, savings of around EUR 0.40 to EUR 0.50 per year per square meter of green roof area can be assumed.

In addition, there are sometimes regional subsidies that can often cover up to half of the costs for the green roof, and the green areas can also be counted as compensation areas during construction.

Tips & Tricks Find out extensive information before you put on a green roof, especially about suitable plants and the correct roof structure. Experience and careful planning are definitely required here.