1. Cut a slot into the horizontal mortar joint using a wall chaser
2. Install Bow Flex ties into the joists either side of the opening, leaving 100 mm protruding from the hole
3. Bend the protruding end of the Bow Flex until it lies along the slot and is parallel to the face of the wall
4. Install Bar Flex, ensuring that the Bar Flex goes behind the bent end of the Bow Flex
5. Ensure that the bent end of the Bow Flex is fully immersed in the Bond Flex