A Selection of Remedial Cavity Wall Ties
Below to the left are mechanical fix and to the right dry fix cavity wall ties
In new construction these cavity wall ties are usually made of stainless steel and are built in to the mortar joints as the wall is constructed.
Remedial cavity wall ties can be inserted in what is referred to as a retro fit system. They are installed through pre-drilled holes straight into each of the outer and inner leaves of the masonry cavity wall from one side. These replacement cavity wall ties are secured by screw action (dry fix) mechanical expansion (mechanical ties) or by the application of resin to bond the new tie to the masonry (resin bonded).