Germany Green Roof Statistics

Today it is estimated that about 10 of all german roofs have been greened.

Germany green roof statistics.

Green roofs like this one in berlin germany support specialized hearty vegetation and provide environmental services such as stormwater retention urban heat island effect amelioration habitat for urban wildlife and energy savings resulting from better insulation. Green roofs can increase a building s marketability. Today this has risen to between 100 and 150 million square metres the german roof gardens association estimates. Some 20 to 25 percent of the city s flat roofs are green and due to a combination of government incentives tax abatements and regulations so are 10 percent of the roofs throughout germany.

The temperature on the green roof on the hottest summer days can be as much as 59 degrees cooler than conventional roofs on neighboring buildings. Germany has the greatest share of green roofs within europe with yearly sales figures amounting to around 250 million euros. Green roof performance data. Cities such as stuttgart and copenhagen have begun to mandate green roofs on most new construction.

Roof produced a 10 percent decrease in building energy use over the winter months. Green roofs can also reduce stormwater runoff by holding water within the substrate and therefore delaying the runoff time. A number of european countries have very active associations promoting green roofs including germany switzerland the netherlands norway italy austria hungary sweden the uk and greece. During a 10 month monitoring period asla s green roof prevented 27 500 gallons of stormwater nearly 78 percent of all precipitation hitting the roof from flowing into d c s overburdened sewer and stormwater system.

Today in europe about 10 000 000m of new green roofs are being constructed each year. Green roofs have excellent noise attenuation especially for low frequency sounds. Germany is the country with the most green roofs in the world and it is the country with the most advanced knowledge in modern green roof technology. Germany had 86 million square metres in 2014 with new additions of roughly eight million square metres a year according to the european federation of green roof and wall associations.

Sod roofs are frequently found on traditional farmhouses and farm buildings in iceland. An extensive green roof can reduce sound from outside by 40 decibels while an intensive green roof can reduce sound by 46 50 decibels peck et al.