"Thank you Tapco. The job on my house had to be dramatically extended (the entire from re-rendered) when we discovered how badly it had been done by the people who built it in the first place. All of what was needed to fix the problem was explained carefully and then..."
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With a history going back over 46 yeas, we have many years of knowledge and expertise repairing properties, including structural damage. If you have noticed any current or potential defects, that in any way could be structural, they shouldn’t be ignored. Once the structure of a property is compromised, the knock-on effects can be horrendous, both in terms of upheaval and cost. Our extensive survey will reveal any structural issues and we will recommend any necessary strengthening that may be required. Some of the most common structural repairs we carry out are cracked brick stitching, cavity wall tie replacement and defective lintel replacement.
What are cavity wall ties?
Wall ties are an integral part of UK house building and found in most properties built from the 1930’s. Two separate walls are constructed, with a cavity in between them. This improves thermal values, allowing the inner wall to stay warmer in the winter, while helping to keep it cooler in the summer months. Cavity walls also help to prevent rain penetration. Properly built and maintained they are an essential part of managing warmth and damp in the home and ideally should also be insulated to keep the property even warmer.
To keep the two walls bonded and staying strong, they are connected by metal straps or ties (cavity wall ties) which are installed at about 90cm centred. However, old wall ties were galvanised metal, which time can corrode or slowly rust away. This is even more of a problem, the closer the property is to the sea, because salty sea air and rain is even more corrosive. As the metal straps corrode they expand and this puts pressure on the bricks, causing them to crack so the sooner they are replaced with stainless steel wall ties the better.
Signs of cavity wall tie failure
When galvanised metal cavity wall ties corrode, the walls start to crack and the support offered to your walls is lessened. In extreme cases they may begin to bow or even collapse. The most common symptom, however, is that the mortar and bricks begin to crack and fracture as your walls slowly start to move.
How we structurally strengthen walls
Tapco HomeDry are not only experts at replacing cavity wall ties, we also structurally strengthen the damage that has been caused, a process known as “stitching”. This is carried out by raking out mortar joints and installing special Helical bars into the brick course of the damaged areas and bedding them in with a resin bonding solution. This will structurally tie and strengthen the walls to prevent further movement. Our technique follows current building regulations, in terms of the recommended number and position of wall ties and the Helical bars and wall ties we use are stainless steel which won’t corrode.Don’t risk of letting your walls fall into disrepair: they are the literally the bricks and mortar of your home or property and if they are left to deteriorate, could lead to considerable structural repair and huge cost. It is likely you are insured against structural damage, so call us first to arrange a survey and immediately notify your insurance company.
Request a Survey
If you have noticed cracking or bowing to your walls, immediately get in touch with us to arrange a survey by using our online form or calling us free.
Tapco HomeDry based in Surrey, is one of London and the Home Counties most established and reputable damp-proofing, wood-rot and property preservation companies. We are long term members of the Property Care Association (PCA), Trust Mark (Government Endorsed Standards), the Guarantee Protection Insurance (GPI), and an accredited Which? Trusted trader, providing thorough, professional surveys for both commercial and domestic properties. For pre-purchase surveys we are the all-inclusive property preservation experts, providing solutions for damp, from the roof to the drains.