This colour has the depth and subtlety of a true blue clay colour which can provide an effective contrast to light coloured stone and brick work.  It is deeper and darker than the Blue Brindle and Dark Heather. Valley tiles are made to course with plain tiles in standard pitches for 35, 40, 45 and 50 roofs and can be made as specials for other pitches.  They are held in place by the two adjacent plain tiles both of which are twice nailed.  This provides a sound and visually attractive form of valley covering.