Remedial Wall Tie Replacement: Ensuring Lasting Stability

Initial Wall Tie Survey

A comprehensive survey is the first step in assessing wall tie health. During the inspection, specialists use advanced tools—such as endoscopes—to evaluate the condition of the original wall ties hidden within the wall cavity. They identify signs of deterioration, such as corrosion and cracks, which may cause structural issues if left unaddressed. This assessment helps determine whether wall ties require isolation, replacement, or additional reinforcement to ensure the structural stability of the wall.

Choosing the Right Wall Tie Solution

Based on the survey results, a technician will select the appropriate remedial wall tie for your structure. The main types include:

  • Mechanical Expander Ties: Ideal for stable brickwork, these ties use expanding sleeves to anchor securely within drilled holes.

  • Resin Ties: Suitable for specific wall types, these ties are set with resin or grout, but are less suitable if cavity insulation is present.

  • Helical Ties: Known for flexibility, helical ties are a preferred choice for various wall types, as they provide expansion-free anchorage without resin​

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Installation of New Wall Ties

Technicians then proceed with the installation of selected wall ties at pre-determined locations. Proper spacing and embedding are essential to avoid structural stress or bulging. Each new tie is securely fitted to ensure both leaves of the wall work together effectively, providing strength and resilience.

Isolation or Removal of Old Ties

Once new wall ties are installed, existing corroded ties are either isolated or removed. Corroded ties can expand significantly over time, risking cracks or further deterioration of the wall. Isolation typically involves cutting or severing these ties to eliminate the strain they might otherwise place on the wall. In severe cases, complete removal may be necessary​

This structured approach not only stabilizes your property but also prevents further damage, giving you peace of mind for years to come.

Common Signs of Wall Tie Failure

Wall tie failure can manifest in various ways, and early detection is crucial to prevent further damage. Some common signs include:

  • Pushed-up Brickwork or Horizontal Cracks: Visible displacement of bricks or cracks running horizontally through the mortar joints.

  • Bulging in Brickwork: Areas of brickwork appearing to bow or bulge outward, often indicating internal pressure caused by failing ties.

  • Stepped Cracking: Cracks that follow a stepped pattern along the mortar joints, often due to shifting or movement in the structure.

  • Missing or Fallen Mortar: Patches of missing mortar that align with wall tie patterns, a sign that the ties may be failing or corroding.

  • Raised Gable End: One of the most noticeable indicators is a raised gable end. As wall ties corrode, they can push the gable upward. From a distance, this can often be seen by the last ridge tile appearing slightly higher than the others, a clear sign of structural movement.