Maclennan-LSE Structural Solutions use the Helifix system for repairing masonry.

Wall Tie Replacement is carried out when the existing ties become corroded and can no longer carry out their function, which is to hold two skins of masonry together. This is a non-destructive repair which involves isolating the existing ties preventing them from causing any further damage. Then new helical ties are installed by drilling a pilot hole then using special equipment screwing them in to hold the two skins of masonry together again. The dry fix ties used for wall tie replacement can also be used to pin arches.

Crack Stitching is used when a building starts to get vertical cracking, once the cause of the crack has been determined as suitable crack stitching method can be employed. Crack stitches are installed into the bed joints across the cracks. The bed joints are cut out and then the helical bar is grouted in place preventing any future movement.