Movement joints, also known as expansion joints, are essential vertical breaks in masonry that allow for natural movement. These joints help prevent cracks and distortion in brickwork due to the shifting and settling over time. Typically, movement joints should be placed every 6 to 12m, depending on the wall's construction materials—6m for lightweight concrete blocks and up to 12m for clay bricks.

Creating Effective Movement Joints

Installing movement joints requires a detailed survey to determine their precise location. Key factors include the position of windows, doors, and wall construction. Once identified, vertical cuts are made through the outer wall, and a foam backing cord is inserted. Remedial wall ties are installed on both sides of the joint, using a grid pattern to ensure stability.

To optimise flexibility, horizontal cuts are made into the bed joints, allowing stainless-steel helical bars to be inserted. One side of the bar is bonded to the masonry, while the other is placed in a plastic sleeve, allowing for lateral movement. This alternating pattern ensures maximum performance. Finally, the vertical joint is filled with flexible mastic material, and repairs are seamlessly blended to match the original masonry.

Based in Bristol, ASRS proudly offers expert movement joint installation services across the region.