Exterior Waterproofing Work

Location: 104 Coles Ave, Woodbridge, ON L4L 1L9

Sales Representative: Patrick Misko

The client contacted The City Wide Group, reporting a basement leak. Upon inspection, the leak and associated wall damage were located behind the air conditioning (AC) unit. The issue posed potential risks of interior water damage and long-term foundation deterioration. The property’s clay soil conditions further contributed to poor drainage and increased hydrostatic pressure against the foundation walls.

Challenges

  • Leak located behind the AC unit, limiting access to the affected area.

  • Clay soil conditions retain water near the foundation.

  • There is a potential for ongoing structural deterioration if this issue is not properly addressed.

Solution and Implementation Process

Site Preparation

  • Obtained utility locates before excavation to ensure safe digging and prevent service disruptions.

  • Disconnected and safely relocated the AC unit to access the work area.

  • Marked the excavation zone and secured the perimeter.

Excavation

  • Excavated soil down to footing level, approximately 7.5’–8’ deep.

  • Ensured stable trench conditions for safe and complete wall exposure.

Foundation Preparation

  • Cleaned exposed foundation walls thoroughly, brushing and scraping all soil and debris.

  • Repaired and parged foundation wall and footing with a Portland/polymer concrete mix where required.

Waterproofing System Installation

  • Applied rubber bitumen membrane (BlueSkin WP200) for primary waterproofing.

  • Installed drainage membrane (Delta MS) to protect the waterproofing and promote vertical drainage.

Drainage System Installation

  • Removed existing weeping tile and installed new 4” perforated weeping tile with filter screening around the perimeter of the waterproofed walls.

  • Placed weeping tiles at the footing level and surrounded them with clean ¾” gravel to facilitate proper drainage toward the discharge point.

Backfilling and Restoration

  • Backfilled excavated areas with native soil, compacting in layers to reduce future settlement.

  • Cleaned the site thoroughly and removed all excess soil and debris.

Final Steps

  • Reinstalled and reconnected the AC unit.

  • Conducted final inspection to ensure system integrity and site restoration.

Conclusion

Exterior waterproofing was completed successfully at 104 Coles Ave. The installation of a new waterproofing membrane system and weeping tile ensures proper drainage, minimizes hydrostatic pressure, and prevents future water infiltration. The AC unit was reinstalled, and the work area was restored to its original condition.