In Norway we could discover the way they use plants to increase thermal insulation: their roofs are covered with plants.
Plant-covered roof in Geiranger, Norway
We can notice that this is not a new technique as they have been using it since the New Stone Age.
It consists in covering slightly sloping or flat roofs with a substrate enabling the development of a plant wall.
Scandinavian countries as Norway have been advocating this technique since the 1970s. In fact a plant wall is more sustainable or durable than a roof made of tiles, wood or metal and it is more environmental-friendly. It protects the environment and respects biodiversity.
One may think it may damage the roof. In reality, it is totally the opposite! The waterproofness of plant-covered roofs is much higher than the one of traditional roofs.
Advantages are more numerous than drawbacks because plant-covered roofs catch dust and pollen better. They are also capable of filtering rain water. They are substitute habitats for insects and for people, they decrease heating and airconditioning costs.
However you need a high level of technicity. That’s why it is still so expensive in the rest of Europe.
In brief, the plant-covered roof, it really is the future!
If you stay in Norway, click on the photos below to discover other Norwegian sites of interest:
Have you already been cruising in Norway?