Cracks in structures and buildings occur for a number of reasons, and accurate diagnosis prior to treatment is essential. In reinforced concrete, cracking usually extends to the steel, so remedial action is required to arrest corrosion. The use of vacuum injection techniques (and careful selection of appropriate resins) enables cracks as fine as 0.1 mm to be sealed and overall fill levels of 98% to be achieved.
A large number of building facades are clad with either tiled or mosaic finishes, which are generally fixed to the host structure with a cementitious backing render. Facade delamination is a common problem with this type of detail, and pressure only injection techniques are actually likely to worsen the situation. The use of vacuum, however, effectively restrains the façade elements whilst injection proceeds.