Sod roof

December 17, 2018
contest: CHANGE in Wood Culture - Environment
$ 4800
Sod roof /media/flashcomm?action=mediaview&context=normal&id=47042
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A sod roof, or turf roof, is a traditional Scandinavian type of green roof covered with sod on top of several layers of birch bark on gently sloping wooden roof boards. Until the late 19th century, it was the most common roof on rural log houses in Norway and large parts of the rest of Scandinavia.
Roofs in Scandinavia have probably been covered with birch bark and sod since prehistory. During the Viking and Middle Ages, most houses had sod roofs.
In modern turf roof construction, bitumen roofing felt combined with dimpled plastic drainage membranes are usually used in place of birch bark. Bitumen roofing felt is nailed to the sarking and a dimpled cavity drainage membrane is laid over the top (dimples face down) to form a drainage layer. The turf is then laid over this drainage layer. Turf roofs are still widely used on newly built cabins in Norway.

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