This week, one of the projects Joint Seal Waterproofing completed was the sealing of a 35-linear-foot cold joint located under a window at a low-rise residential building on Bloor St. W in Toronto. The purpose of this repair was to prevent water infiltration from the street into the unit, ensuring a durable and long-lasting waterproofing solution.
Why Waterproof Cold Joints
Cold joints are particularly vulnerable to water penetration due to the natural separation between two different construction materials, in this case, the brick wall and the asphalt floor. Over time, exposure to moisture, temperature fluctuations, and external pressure can widen these gaps, allowing water to seep in and cause damage to interior spaces. Proper waterproofing of cold joints is essential in maintaining the integrity of the structure, preventing mold growth, and avoiding costly repairs due to water damage.
Repair Method
The repair process began with the removal of the existing flashing, followed by the removal of a two-foot rubber membrane beneath the window. Once exposed, the cold joint—where the brick wall meets the asphalt floor—was opened and thoroughly cleaned. A monolithic, industrial-grade epoxy adhesive was then applied to strengthen the bond and create a seamless seal. Next, a geotextile fabric was installed to reinforce the joint, providing added flexibility and durability. Finally, a waterproof polyurea-based sealing polymer was applied to create a watertight barrier, preventing moisture penetration and ensuring structural integrity. Reinstalling the flashing was the last step of the repair.
Our Repair Application – the Advantages
The materials used in this repair offer several advantages. The monolithic epoxy adhesive ensures a strong and lasting bond, preventing water from seeping through the joint. The geotextile fabric enhances flexibility and crack resistance, allowing for minor movements without compromising the seal. The polyurea-based sealing polymer provides superior waterproofing performance, withstanding environmental stress, chemical exposure, and mechanical wear.
The repair method itself also offers significant benefits. By thoroughly opening and cleaning the joint before applying the adhesive, geotextile, and sealing polymer, the repair creates a robust, multi-layered waterproofing system. This comprehensive approach ensures a longer lifespan for the joint, reducing the likelihood of future leaks. Additionally, the use of a seamless, industrial-grade sealing system minimizes maintenance requirements and enhances the overall durability of the structure.
By utilizing these high-performance materials and a meticulous repair process, Joint Seal Waterproofing delivered a robust and reliable solution for long-term water protection at this residential building.
Learn more about our great variety of concrete repair and waterproofing solutions by visiting the different pages of our website: https://www.jointsealwaterproofing.com
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