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 large parts of Scandinavia.
No two turf roofs are the same. Some are bright green and almost velvety. Others are golden and look like they’re growing wheat or oats. A number of turf roofs have flowers mixed in with the grass, and a few have small trees. There are many advantages of turf roofing . They are very heavy, so they help to stabilize the house; they provide good insulation; and they are long-lasting. Special skills and materials are required to prepare the roof for the turf topping.