A wide range of concrete repairs and waterproofing solutions could be required at underground parking garages of mid- and high-rise residential or office buildings: concrete crack repair and patching (walls, ceilings, columns, ledge beams), traffic topping and ramp repair, and expansion joint injection.
Negative-Side Joint Injection
Podium roof expansion joint waterproofing does not require above-grade demolition and the existing membrane removal – our industrial-strength materials allow for joint injection to be done from inside the parking garage.
Concrete surfaces can be restored with minimal demolition, since patches as thin as 5 mm can be applied by using our industrial-grade materials – unlike the traditional repair methods that require a two-inch demolition. In most cases, slab replacement can be avoided.
Traffic Topping Repair
Our specialised self-levelling materials allow us to repair traffic topping instead of replacing it, as long as there is sufficient adhesion between the existing surface and the underlying waterproofing membrane. When applied over the top, they seal any cracks and work as a traffic topping. Please refer to our Traffic Topping page for more details.
Expansion Joint Injection
To be able to inject a polyurea-based waterproofing material (even from underneath the podium roof), injection ports are drilled on both sides of the joint after it is cleaned out. An industrial-strength adhesive is applied next, and a backer rod (two backer rods for wall joints) is inserted to ensure the injected material will remain in place. A liquid rubber-like material is then injected into the joint, followed by a polyurea foam injection.
Ledge Beam Repair
To waterproof an expansion joint above a ledge beam, the same procedure as outlined above is followed – after the joint is located. In this case, however, a guided rail is used to drill through approximately 40 cm of ledge beam concrete to reach the joint. Crack repair, patching and painting of the beam are done, as needed.
Crack Repair And Patching
Cracks are routed and cleaned out, in preparation for repair. Once all the debris is removed, the surface is coated with an industrial-strength adhesive, and the crack is filled. If required, the repaired area is painted to match the adjacent surface.
Before a patch is installed, any loose concrete must be removed, to ensure proper adhesion. The surface to be repaired is then coated with an industrial-grade adhesive. The patch is applied next. Its thickness can vary if resloping is required.
Traffic Topping Repair
To ensure a lasting repair, a well-defined procedure is followed, with the materials used as needed, depending on surface type. In each case, the first step is surface preparation – the floor must be clear of any lose material or debris, to ensure proper adhesion. Any type of traffic topping can be repaired: asphalt, mastic, or concrete.