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Green Roofs of Norway

Time and again we see pictures surfacing on the web of these adorable green roof topped house with a mesmerizing scenery that are located in Norway.

It is probably true that many people just assume it is some type of green technology, pin it, and move on with their day.  This is actually not a modern invention.  Norwegians have been planting greenery atop their roofs for hundreds of years.  During the time of Vikings or the Middle Ages, majority of the houses had sod roofs.  This allowed for more warmth in the home rather than some of the modern materials such as steel or tile. The soil layer above the membrane roof adds great insulation.

Today, tradition carries on with an award for the best green roof project in Scandinavia by the Scandinavian Green Roof Association.  Studies by a German professor, Gernot Minke, suggest that green roofs can reduce the effect of electromagnetic radiation.

There are two main types of green roofs.  Intensive rooftops are generally conventional lawns, vegetable gardens, small shrubs or trees. The weight between 80 to 120 lbs. per square foot and needs a planting medium of 4 to 24 inches. Extensive rooftops are herbs, moss, or grass and generally have low maintenance. They weight between 10 to 50lbs. per square foot and needs a planting medium of 1 to 4 inches.

Green roofs can reduce cooling costs by 50% in the summer and they help retain heat at 15% to 30% more than a conventional roof.  With green roofs there is no storm pollution runoff unlike traditional roofs that produce chemicals and pollute our sewage systems. Additionally, green roofs can reduce outside noise by 40 decibels.  It is even possible to grow food on the roof.

How is that for sustainable!

Source:
http://www.greenroof.se/?pid=23

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