At left-hand verges and left-hand side abutments, left hand verge tiles must be used in alternate courses. The Postel clay tile is new to our range of tiles.  It originates from the Courtrai tile, which was imported into the UK from Belgium between the world wars due to a lack of indigenous supply at the time. It was particularly popular in the South-East of England.  Thousands of housing estates were covered with these tiles and many are now in need of re-roofing. In many cases a like-for-like replacement is required. As a response to this, we launched a similar product, Postel.  Properties Nail size: 45mm x 3.35mm stainless steel ring-shanked. Tile finish: smooth finish. Tile profile: clay tile. Certification BBA certified. Postel Clay Romans conform to BS EN 1304:2013 Clay roofing tiles and fittings - Product definitions and specifications.