This way of improving a building is not just a fashion statement. Boring walls and roofs can be transformed into a high-quality eye-catching with high ecological value.
Dead, with gravel covered garage and hall roofs are not necessary. Planned in advance green roofs are hardly more expensive than conventional solutions.
Properly applied, they definitely show a more favorable ratio considering the follow-up costs. Greening can be done at just about any angle of inclination.
And "last but not least": Green roofs can be promoted by public subsidies.