Expanded Block Work Mesh is used to reduce cracking within  brick and block masonry by adding tensile strength to the traditional construction method. When embedded in the mortar joint forms an integral structure of great tensile strength and resists stress, vibrations and thermal changes, minimizing the effect.
It is a length of expanded steel mesh with continuity and has no joints, welds or interweaving to fail under stress. Once mortared into brick work the mesh is immovable and cannot slip under tension.
As a general rule mesh should be set in the bed joints with its outer edge about 25mm from the face of the block work and should be used every second course of a wall. Combinations of different widths may be used to suit any wall thickness