How do You Repair Stair-step Cracks in Brick Veneer?

Repairing stair-step cracks in brick veneer requires a professional three-step approach that addresses the root cause of the movement rather than just providing a cosmetic fix.

1. Diagnostic Inspection and Diagnosis:

A professional must first determine if the crack is active. This involves using crack monitors or precise measurements to track movement over time. Contractors also look for other signs of foundation problems, such as sticking doors or sloping floors, to confirm that the cracking is caused by foundation settlement rather than minor mortar shrinkage.

1. Foundation Stabilization:

If active settlement is confirmed, the foundation must be stabilized before repairing the brickwork. The primary method involves installing helical pier systems. These steel shafts are driven deep into stable, load-bearing soil to bypass unstable layers, effectively stopping the structure’s downward movement and preventing the cracks from widening further.

1. Structural Reinforcement and Masonry Repair:

Once the foundation is stable, the following techniques are used to restore the veneer:

• Crack Stitching: This involves using a helical-based system to reconnect cracked brick wythes and redistribute stress across the mortar joints.
• Epoxy Injection: For narrow, non-moving cracks (between 0.002 and 0.25 inches), structural epoxy can bond the masonry and restore its capacity.
• Concrete Crack Lock Kits: These provide high-tensile reinforcement for masonry that requires extra stability.

It is essential to consult a structural engineer to ensure the repair plan complies with local building codes and specifically addresses the site’s soil conditions.

• Stair-Step Cracks in Brick: Signs of Foundation Problems