In which country are turf houses depicted in the picture common?
Icelandic turf houses were the product of a difficult climate, offering superior insulation compared to buildings solely made of wood or stone, and the relative difficulty in obtaining other construction materials in sufficient quantities.
The common Icelandic turf house would have a large foundation made of flat stones; upon this was built a wooden frame which would hold the load of the turf. The turf would then be fitted around the frame in blocks, often with a second layer, or in the more fashionable herringbone pattern.
The only external wood would be the doorway which would often be decorative; the doorway would lead into the hall which would commonly have a great fire. The floor of a turf house could be covered with wood, stone or earth depending on the purpose of the building. They also contain grass on their roofs.