FAQs Archive - Northwest Wall Ties

Q: How long do replacement wall ties last?

Modern replacement wall ties, especially those made from stainless steel, are designed to be durable and corrosion-resistant, offering a long-lasting solution for maintaining the structural integrity of cavity walls.

Q: Can I replace wall ties myself?

While some may consider a DIY approach, replacing wall ties requires specialised knowledge and equipment to ensure safety and effectiveness. It's recommended to consult with professionals who can accurately assess and address the issue.

Q: How much does cavity wall tie replacement cost?

The cost varies based on the severity of the problem and the number of ties that need replacement. It's advisable to have a professional survey to assess the situation and provide a detailed quote.

Q: What types of replacement wall ties are available?

Replacement wall ties come in various designs, including mechanical, helical, and resin-based options. The choice depends on factors like the condition of the masonry and the specific requirements of the structure.

Q: How are replacement wall ties installed?

The installation process involves identifying the positions of existing wall ties, drilling pilot holes at specified intervals, and inserting the appropriate replacement ties, such as mechanical, helical, or resin-based ties, depending on the wall's condition. After installation, it's crucial to isolate or remove the old, corroded ties to prevent further damage.

Q: What are the signs of failing wall ties?

Common indicators include horizontal cracks in the brick mortar, bulging or bowing walls, and damaged window reveals. These symptoms suggest that the wall ties may have deteriorated and require attention.

Q: Why might cavity wall ties need replacement?

Over time, wall ties can corrode due to exposure to moisture and oxygen, leading to structural issues. Additionally, improper installation during construction, such as insufficient embedment depth or an inadequate number of ties, can necessitate replacement.

Q: What are cavity wall ties, and why are they important?

Cavity wall ties are components used to connect the inner and outer leaves of a cavity wall, ensuring structural stability by allowing the two parts to act as a unified structure. They are essential for maintaining the integrity of cavity walls.

Q: How often should cavity wall ties be inspected?

The frequency of inspections depends on the age and condition of the property. For properties built before 1981, especially those in exposed or coastal areas, regular inspections are advisable due to the higher risk of wall tie corrosion. If you notice any signs of wall tie failure, such as horizontal cracking or bulging brickwork, it's essential to arrange a survey promptly.

Q: What happens if wall ties are found to be corroded?

If a survey reveals that wall ties are corroded or failing, replacement is typically recommended to maintain the structural integrity of the building. The process involves: Locating Existing Ties: Identifying the positions of the old wall ties. Installing New Ties: New stainless steel mechanical or resin-bonded ties are installed in an offset pattern to the existing ones. Isolating Old Ties: The old ties are isolated by removing the surrounding mortar or by using grease-filled sleeves over the exposed ends to prevent further corrosion and expansion. The work is carried out from scaffolding or temporary scaffold towers, depending on terrain and access. Stainless steel wall ties are used as they are corrosion-resistant. Replacement cavity wall ties also benefit from long-term guarantees.