Tenera was engaged to address the deterioration of traffic topping in a parking garage located at a building on University Ave. in Toronto. The client required a durable, efficient solution to restore the worn surface without disrupting the building’s operations during regular hours. Our team was able to provide a specialised repair solution using polyurea-based membranes, a modern and highly effective alternative to traditional traffic topping methods.
Why Polyurea-Based Membranes?
While conventional traffic topping repair typically involves the full removal of the existing membrane, followed by the installation of a new layer, we opted for a more efficient approach. By leveraging the advanced properties of polyurea-based membranes, the contractor was able to perform targeted repairs on the existing surface. This method significantly reduced the time and costs associated with full replacement while ensuring long-term performance.
Scope of Work
The repair process covered an area of approximately 700 square feet and included the restoration of a cold joint around one of the structural columns. Due to the location and the building's operational needs, all work was carried out overnight to avoid disrupting the normal flow of activities in the garage.
Repair Method
Traffic Topping Repair
To ensure durable results, the contractor was instructed to follow these repair specs:
Surface Preparation: The first step in the process was the removal of the existing, deteriorated traffic membrane. To achieve proper bonding for the new system, we ground down the concrete substrate and thoroughly cleaned the surface, ensuring that no dust, debris, or contaminants would interfere with the adhesion of the new membrane.
Crack Repair: Any visible cracks in the concrete were addressed by applying a specialised crack-filling material designed to prevent further water infiltration and structural damage. This step was crucial for reinforcing the integrity of the slab before applying the new membrane.
Basecoat Application: A polyaspartic basecoat was then applied to the prepared surface. This basecoat serves as the foundation of the system, providing a flexible, durable layer that bonds securely to the concrete. Its quick-curing properties allowed for rapid progression to the next steps.
Non-Slip Aggregate Broadcast: To enhance traction and ensure the safety of both vehicles and pedestrians, a large quantity of non-slip aggregates was broadcast onto the wet basecoat. This step is particularly important in high-traffic areas where skid resistance is a priority.
Topcoat Application: Once the basecoat had cured, a polyaspartic topcoat was applied over the aggregate. This top layer not only seals the system, providing waterproofing and chemical resistance, but also locks in the aggregate to form a long-lasting, traffic-ready surface. The polyaspartic system offers superior abrasion resistance, making it ideal for environments like parking garages where surfaces are exposed to heavy vehicle traffic.
Cold Joint Repair
For waterproofing the cold joint, the specs given were as follows:
Chipping and Cleaning: The cold joint between the column and the floor required specialised attention. The crew began by chipping out the existing material surrounding the cold joint, followed by a thorough cleaning to remove any loose debris and contaminants. This step was essential for ensuring a clean, stable surface for the application of the new materials.
Waterproofing Application: After cleaning, a high-performance waterproofing material was applied to the cold joint area to create a moisture barrier. This prevents water infiltration, which is a common issue in parking garages and can lead to long-term structural damage if not addressed properly.
Concrete Patching and Adhesive Application: A layer of industrial-strength adhesive was applied next to ensure a strong bond between the existing substrate and the new concrete patch that followed. The patch was installed carefully to fill in the voids and restore the structural integrity of the cold joint.
Fibreglass Reinforcement: To further enhance the durability of the cold joint repair, fibreglass reinforcement was installed. This additional layer acts as a protective barrier, ensuring that the waterproofing system remains intact over time, even under heavy traffic and exposure to the elements.
Importance of Traffic Topping Repair
The longevity and functionality of parking garages depend heavily on the condition of the traffic topping. Over time, constant exposure to vehicular traffic, water, de-icing salts, and other environmental factors can wear down the protective membrane, leading to cracks, leaks, and even structural degradation. By addressing these issues promptly through professional repair, following specifications, such as those provided by Tenera’s specialists, building owners can extend the life of their parking structures, avoid costly repairs, and maintain a safe environment for both vehicles and pedestrians.
The work done on University Ave. demonstrates the effectiveness of modern repair methods that prioritise durability, safety, and efficiency. If you're interested in learning more about our solutions for traffic topping repair, whether for asphalt, mastic, or concrete surfaces, feel free to reach out to our team.
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