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.