Wall Ties & Wall Stabilization
According to BRE research out of nine million dwellings constructed with cavity walls, two million suffer wall tie corrosion or failure and are in need of specialist remedial wall tie replacement.
Inspections are carried out to suspect walls with a visual inspection looking for horizontal cracking in wall an indication that problems may exist with tie corrosion, the use of endoscope allows for a quick and easy inspection over a large area and where necessary removal of bricks can allow for full inspection of tie.
Installation of Replacement Ties
A range of alternative wall tie designs is available – resin, mechanical or cementitious -depending on the type and condition of the masonry involved. In most cases the existing ties are isolated to prevent further corrosion.
Cementitious masonry anchors provide an effective method of structural reinforcement which can be designed to meet specific building strengthening and repair requirements.
The anchor comprises a stainless steel bar surrounded by a woven polyester fabric mesh sleeve into which a specially formulated cementitious grout is injected under pressure. The flexible sleeve expands and moulds itself into the cavity’s and cracks within the wall, providing a mechanical and chemical bond when cured.