Cracking where the party wall or partition wall meets external walls is a common problem caused by a lack of connection between the two walls.
Cross Wall Tying
Often the connection between the two walls is just a cement fillet which provides no connection or protection against outward movement.
In order to tie the two walls together we utilise the twistfix bed joint reinforcement by chasing out the external bed joints, drilling into the partition wall and chasing into the internal partition wall providing an L shaped tie resisting any further movement. The cement fillet is raked out to a depth of 80mm and injected with twistfix cementitous grout providing a permanent solution guaranteed against failure for 10 years.
Newman’s teams of Structural Repair Technicians have begun works across London and the South East restoring the Structural Integrity of Failed Masonry.
Investigation works are underway at a block of low level flats in Oxford to discover the cause of subsidence. Investigation works include CCTV drainage inspections, Water pressure testing of incoming mains water supply, Soil investigations and structural diagnosis.
Structural Inspections
Bay Window Repairs are underway in Fulham, South West London for one of our Principal contractor clients. Newman’s were called in to carry out a Structural Survey and crack monitoring as the bay window was moving outwards causing major concern. A structural repair specification was designed and installation has begun incorporating Twistfix’s Bed Joint Reinforcement and Lateral Restraint Ties which will be provide a permanent insurance backed solution.
Bay Window Restraint
Concrete repairs and Anti Carbonation coatings are underway in North London to a commercial shopping precinct and the social housing above as vertical and horizontal cracking had appeared across the structure. the cause of cracking was identified as lack of cover to the concrete reinforcing causing oxidastion of the reinforcing rods and spalling the concrete. An anti carbonation coating is also being spray applied to the concrete structure after the concrete repairs.
Newman’s have completed a wall tie replacement repair to a property purchased by a private home owner. The home owner became concerned after the purchase as short horizontal cracks were appearing in the outer leaf of the brickwork as well as some of the bricks lifting and rotating.
Wall Tie Installation
Newman’s carried out a wall tie survey using a visual survey and an endoscope survey to determine the condition of the existing wall ties. The wall ties were found to be in a poor state with high levels of corrosion and inadequately spaced.
Current Wall Ties Corroded and Wrongly Spaced
Our specification included the installation of Twistfix’s patented CD 9mm stainless steel Remedial Wall Tie. Installation is a simple process with the helical tie being installed through a 6mm pilot hole.
Isolation of the tie is carried out by locating the existing wall tie and encompassing it with a clan sleeve also supplied by Twistifx. With sleeves in place and the ties isolated re-pointing of the cracked masonry can be carried out and tie holes filled with a mortar to match the existing bricks.
Replacing Current Wall Ties
All of our repair schemes are covered by our own guarantee and for consumer protection we are also members of Insured Guarantees Limited enabling us to provide you with an insurance backed guarantee, which for this particular project guarantees the installation for 20 years even if Newman’s are no longer operating.
