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A Movement Joint or ‘Control Joint’ is an intentional interruption in the tile or stone surface toallow for movement in the wall or floor. Hard flooring expands and contracts due to the cyclic thermal variation. Installing a movement joint prevents the tiles and grout from cracking or de-bonding. Designed to safely absorb any expansion and the contraction of construction materials the Movement Joint absorbs vibrations and allows movement for ground settlement. Installing Movement Joints in floors allows the tile bed to move in unison with the individual substrates. movement joint type depends on joint width, finished floor use and movement capability. Ideally specified distances across a floor to create individual tile beds are designed so that no single area is greater than 100m2 without movement joints. Movement joints are also incorporated into the design for mitigating aesthetic concerns.