Wall Tie Failure and Replacement

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What is a wall tie?

Cavity wall construction was used in around 90% of homes built between 1920 and 1981. As a result, your house will likely suffer from wall tie corrosion and failure. This is approximately 10 million houses in the United Kingdom!

Typically, your home features an outer leaf of 100mm thick brickwork, a 50mm deep cavity, and an inner leaf of 100mm dense blockwork. The exterior and interior leaves of your property are connected with wall ties. Horizontally, they are usually 900mm apart and vertically 450mm apart. Older links also had a relatively thin layer of galvanizing coating, which was insufficient to prevent the steel from rusting away.

A wall tie is a steel bar, strap, or twined wire embedded into your masonry wall to keep it together, generally made of mild steel. The stability of your exterior walls depends on the efficacy of your wall ties. Wall ties are quite important for the structural integrity of your walls. They were composed of a thick mild steel bar shaped like a fishtail if you have any older links. Modern wall tiles are made out of a twisted wire and resemble a butterfly.

Why do Wall Ties fail?

The all-too-familiar rusting cycle begins when your wall ties’ steel is exposed to air and oxygen. The corrosion and failure of the wall tie in your home are possible due to this rusting. If this happens, the outer leaf on your property has a significant chance of caving in, especially during strong winds that create suction on the face of the wall.

Another issue is the larger volume of steel, which causes your home’s masonry to fracture and lift. Oxidization takes up more room than the original metal. As a result, the growth in length of the bed connection forces it to burst. Every 450 millimetres along the wall, cracks run down the bed joints. As a result, they are an obvious indication of wall tie corrosion in your house. This is where you may notice swelling in your walls.

What are the signs of Wall Tie Failure?

Your walls may show signs of horizontal cracking – at regular intervals in your external masonry joints.

On the other hand, excessive wide walls may be detected by outward bulging–the wall expands, causing it to deflect outwards around your window frames.

Internal fractures may be visible, but they’re often minor. Internal wall junctions in your house may contain vertical cracks, and interior wall and ceiling joints can create horizontal fractures.

What if I think I have short wall ties?

Do you believe that poor wall connections may be a problem for your property? The first step is to schedule an appointment with one of our expert inspectors to assess the severity of the issue. We’ll use a metal detector and an endoscope to determine where current wall ties are placed. We may need to remove bricks for the practical examination of sample ties.

For a modest fee, our fully qualified Wall Tie surveyor, Jamie, can carry out a thorough wall tie survey and provide you with a complete set of recommendations. If the wall tie survey shows that remedial work is necessary, we will give you a precise timetable of the proposed repairs as well as an estimate. We assure you of competitive pricing while still providing high-quality repairs that you can trust. All of our quotations are delivered on a fixed price basis, and our reputation assures you in terms of quality and fairness.

What can you expect from our survey?

Investigation – We collect information on the type and condition of masonry, cavity width, and the current wall tie type and shape. Depending on the status of the existing wall ties, we may need to isolate/remove them. Specification – choice of remedial wall tie type; density and arrangement of remedial wall ties. Installation of replacement wall ties. Visual inspections, torque testing, and so on Quality control – visual checks, torque testing

The installation of replacement wall ties:

Atlantis Damp highly experienced and skilled specialist on staff at Atlantis Damp who will carry out any necessary repairs. Resin, drive ties, or cementitious wall ties are among the alternatives available. In most cases, your old relationship is disconnected to prevent additional damage.

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