Wall ties, sometimes called 'brick ties', are used in buildings with cavity walls. They are used to join the two leaves of a cavity wall together. When fixing windows, door frames etc. to masonry, the frame tie provides enhanced mortar keying and reduces the risk of injury from sharp edges. Browse our range of wall ties and frame ties. Wall ties and frame ties. are available for delivery or can be collected in store in our Peterborough, Huntingdon and Corby branches. If you still need some assistance, please call into your local branch for advice.