Case Study: Targeted Basement Leak Repair for Finished Basement in Cambridge

Location: Cambridge, Ontario
Client: The Desai Family
Issue: Water intrusion through basement wall joint in finished living space
Service: Precision basement leak repair using polyurethane injection and interior sealant system

The Challenge

The Desai family noticed damp carpet and minor water staining on the baseboards of their finished basement after a week of heavy rainfall. They initially believed the water came from a plumbing leak, but further inspection revealed the intrusion was coming through the cove joint—where the basement floor meets the wall—along the rear wall of the home.

Because the basement was finished and in regular use as a family living area, the homeowners were concerned about water damage, mold growth, and long-term structural integrity. Immediate, non-invasive repair was a priority.

Our Solution

Direct Waterproofing performed a comprehensive leak assessment using moisture mapping and thermal imaging to identify the exact point of entry. Since the issue was isolated and no widespread hydrostatic pressure was present, we recommended a targeted basement leak repair approach using polyurethane crack injection and interior waterproofing sealants.

Project Steps:

• Leak Identification and Prep: Carefully removed a section of the finished wall and insulation to expose the leaking joint.
• Polyurethane Injection: Used high-pressure injection to fill and seal the joint from inside, allowing the flexible polyurethane foam to expand and fully block water entry.
• Sealant Application: Applied an additional waterproofing sealant on the interior surface to enhance long-term durability.
• Moisture Control Recommendations: Provided guidance for improved dehumidification and exterior grading to minimize future risk.
• Clean Restoration: Reinstalled the wall framing and drywall, leaving no visible sign of the repair.

The Result

The leak was stopped entirely, and no further moisture entered the space through the following months of spring storms. The Desai family was able to continue using their basement as a family room without any further concern for water damage or mold development.

Client Testimonial

“We were so relieved when Direct Waterproofing found the source of the leak and fixed it without having to tear apart our whole basement. Their team was professional, precise, and incredibly respectful of our home.”
— The Desai Family, Cambridge

Frequently Asked Questions

1. What causes basement leaks like this one?
Leaks can come from wall cracks, the cove joint, window wells, or rising groundwater. In this case, pressure at the wall-floor joint allowed water to seep into the basement during storms.

2. Is crack injection a permanent fix?
Yes, when applied properly, polyurethane crack injection is a long-term solution. It expands to fill the gap completely and remains flexible, even as the foundation naturally shifts.

3. Do I have to remove drywall to perform a leak repair?
Only if the leak is behind finished walls. We minimize removal and handle all repairs and replacements to restore your space cleanly and efficiently.

4. How long does the repair take?
Most basement leak repairs can be completed in a single day, including wall access, injection, sealing, and cleanup.

5. Can you prevent future leaks as well?
Yes. In addition to repair, we assess contributing factors like exterior drainage and interior humidity, offering full waterproofing solutions if needed.

To address basement leaks in your Cambridge home, visit our Basement Waterproofing Cambridge page or book a consultation with our expert team today.