As well as slate and lead, a common roofing material used in Georgian, Victorian and Edwardian period houses was the clay tile. These are either flat, interlocking, or shaped for use on ridges.
This section covers:
Plain or 'peg' tiles are nailed to wooden batterns, or else fixed with wooden pegs.
Common tile designs were the arrowhead, club, bullnose and fishtail:
These are found in a range of designs, including the pantile and the modern Redland-style (made from concrete rather than clay). Interlocking tiles were rarely original in London houses of 1830 to 1914.