Marley Clay Plain Acme Double Camber External Angle Left Hand - Burnt Flame Description Vertical angle tiles are available in left and right handed formats to fit 90 angle external corners of wall elements and are designed to bond with standard plain tiles. Guidance Counter-battens, where used, should be fixed 20mm in from the end of the tiling battens at the corner, to prevent the end nail or screw fixing from splitting the tile batten. Cut ends of the tiling battens should be alternated to coincide with the short leg of the external angle tiles. Fix left and right handed external angle tiles in alternate courses up the external corner to fit with the adjacent standard plain tiles. Avoid cutting the angle tiles to fit with the adjacent tiles. Secure each vertical angle tile by twice nailing.