Wall anchoring

Masonry reinforcement using spiral anchors is a modern, minimally invasive repair technique used to restore the load-bearing capacity and monolithic integrity of cracked masonry structures. It is performed in residential, industrial, and historic buildings where the stability of the walls has been compromised. When carried out correctly, the procedure effectively bonds the cracked sections together and protects the building from further delamination.

What is wall crack anchoring?

This is a repair system that involves embedding profiled stainless steel spiral anchors into the supporting joints (between bricks or blocks), which absorb tensile stresses and distribute loads evenly.

The main causes of delamination and cracking in masonry:

Uneven settlement of foundations, traffic- or earthquake-induced vibrations, pressure from the roof or ceilings on the walls, aging and leaching of old-fasioned mortars, structural defects, and the effects of weather conditions.

What factors determine the selection of anchors and mortar?

The selection of anchor parameters and diameter depends primarily on the magnitude of the tensile forces present in the damaged area of the masonry and on the thickness of the mortar joint.

Required properties of the mortar:

• • High adhesion and strength —it must bond permanently to both the smooth stainless steel of the anchor and porous mineral substrates (brick, stone).
  • No shrinkage —the mortar must not decrease in volume as it sets, to prevent the formation of microcracks that would weaken the bond.
  • Weather resistance – it must maintain its performance characteristics both inside and outside buildings (resistance to frost and moisture).
  • Thixotropy – the mortar should have a stable consistency that does not run out of the wall grooves during application, but at the same time is easily compacted.