From Living Roofs:
Copenhagen is the first city in Scandinavia to have a manditory green roof policy. The new policy makes vegetation and soil a mandatory obligation in planning. The policy covers all roofs with less than a 30 degree pitch and also covers refurbishment of older roofs. However such roofs will get some public financial.
The green roof policy is part of a wider ambition the City has to be carbon neutral by the year 2025.
Copenhagen presently has 20,000 square meters (over 215,000 square feet) of flat roofs. It is hoped that as much as 5,000 square meters of new development each year will be covered with vegetation.
Vegetated roofs, or green roofs, provide several benefits for buildings and their surroundings. They can absorb as much as 80% of rainfall, helping to reduce stress on stormwater systems. They help reduce urban temperatures, and they protect roof membranes from the sun’s UV rays and the greatest temperature swings, such that roof membrane life is extended as much as double that of an unprotected membrane.
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