Terracotta is 1 of our specialties, these roofs may often be more difficult to work on as the clay tiles are more brittle, slippery & in general have a higher pitch.  We clean & treat your clay tiles with a specialized solution to remove moss & fungus, bringing the tile up to their natural colour.  Then apply a clear glaze which acts like a sealant to prevent further moss & growth, leaving your terracotta roof looking shiny & new.