The use of wood (excellent as an insulating material) is widespread. The single-unit building with farming premises and living accommodation under the same roof is typical of mountainous country. However, there is no lack of "composite'' houses. The buildings of the farmers are complex structurres designed to accomodate human beings, flocks and farm products. They have gable roofs, and are often built of unplastered stone lais with lime-mortar.