Cavity wall ties are vital in holding the inner and outer brick walls together. However, they can deteriorate over time. Early detection of cavity wall tie failure is crucial. This helps to prevent costly repairs and potential structural issues. So, how can you identify failing wall ties and take steps to avoid them? Knowing these signs correctly lets you know when to hire a wall tie replacement service in Hampshire.

The Surefire Signs of Cavity Wall Failures

Unfortunately, cavity wall ties reside within the cavity itself. So, direct inspection is not possible. However, their distress can manifest through a variety of telltale signs on your home’s exterior and interior:

  • Horizontal Cracking:

    Cracks parallel to the mortar joints, particularly at regular intervals, strongly indicate failing wall ties. As the ties rust and expand, they push outwards against the outer wall, causing cracks.

  • Bulging Walls:

    In severe cases, the outward pressure from failing ties can cause the outer wall to bulge. This is a serious sign that requires immediate attention from a qualified surveyor or builder.

  • Lintel Dropping or Sagging:

    Wall ties also help support lintels (horizontal supports above doors and windows). If the ties fail, the lintel may begin to sag or drop, creating unevenness and potentially causing cracks above windows and doors.

  • Internal Plaster Cracks:

    While less common, extensive tie corrosion can lead to the separation of the inner and outer walls, causing cracks to appear in the interior plasterwork.

The good news is that cavity wall tie failure can be prevented through proactive measures:

  • Regular Inspections:

    Schedule a professional inspection of your cavity wall ties every 10-15 years, especially if your home is in a coastal area or prone to high moisture levels.

  • Material Matters:

    Modern cavity wall ties are typically made from galvanised steel or stainless steel. They offer superior corrosion resistance. Hence, you should avoid older properties with weaker tie materials like iron.

  • Proper Ventilation:

    Maintaining good ventilation within your home helps prevent moisture build-up in the cavity, which can accelerate tie corrosion. You must invest in extractor fans in bathrooms and kitchens and ensure proper air circulation throughout the house.

  • Repointing:

    Regularly repointing the mortar joints between bricks helps prevent water ingress into the cavity, which can contribute to tie corrosion.

If you suspect cavity wall tie failure, don’t hesitate to contact a professional wall tie replacement in Hampshire. Contact Davies Pointing Service and our qualified surveyor will assess the extent of the damage and recommend the appropriate course of action.