A green roof designed to attract biodiversity (especially pollinators) as a mean to compensate ecological habitat fragmentation. To optimise its functions, it must include various microclimates, native shrubs, pollen and nectar-rich plants, tall grasses, meadows, rocks, branches, birdhouses, bee nest boxes and water sources. The inclination of the roof must be between 0 and 45º.
A pollinator green roof is built with:
- A waterproof layer. The material must to be resistant to roots: PVC, EPDM.
- A separating layer. This layer must to protect the waterproof layer. It is usually use geotextile sheets.
- A draining layer. This layer creates an air chamber that allows excess water to be evacuated.
- Water retention layer. Layer with a singular geometry that allows the water retention.
- Filtering layer. This layer prevents the loss of fine from de substrate.
- Absorbent layer. It has made by materials which retain water and they liberate it slowly.
- Substrate. Support layer of the vegetation where the work of the roots takes place.
- Vegetation - Native shrubs, pollen and nectar-rich plants, tall grasses, meadows.
This NBS can be built on any roof that resists more than 75Kg/m2. The inclination of the roof must be between 0 and 45º. Depending on these conditions the type of the green roof will be different. We can remove this NBS easily if we want to change the roof.
AMORTISATION: Short term/Medium term/Long term/No amortization
Pollinator green roofs get the recovery of the investment between the 10 and the 20 years.