Concrete roof tiles

It is a popular style used in vernacular and neo-vernacular architecture in britain. Spreading rapidly, roof tiles were within fifty years in evidence at many sites around the eastern mediterranean, including mainland greece, western asia minor, and southern and central italy. Early roof-tiles showed an s-shape, with the pan and cover tile forming one piece. They were rather bulky affairs, weighing around 30 kg apiece - more expensive and labour-intensive to produce than thatch.