Table of Contents
Job Overview
Location: Toronto, Ontario
Structure: Attached two-story century building with commercial units at grade and residential apartments above
Problem: Reported mice activity inside a commercial
Service: Mouse treatment and structural exclusion
Visits: 2
Summary
Our team was contacted to address ongoing mouse activity within a commercial office located in a mixed-use, attached century building. The service involved a full interior and exterior inspection, licensed rodent treatment, and targeted exclusion work to prevent rodent movement between connected units. Following completion, activity was significantly reduced and no further migration between structures was reported.
Background / Property Context
The property is an older, attached structure with shared walls and services between neighboring commercial and residential spaces. One adjacent unit operated a food-related business, increasing rodent pressure within the shared building envelope. Aging masonry and utility penetrations were present in mechanical areas.
Customer Concern
The customer reported repeated signs of mice inside the office and requested both immediate treatment and a professional assessment for exclusion to prevent further entry.
Inspection & Findings
During the initial visit, our technician conducted a detailed interior and exterior inspection. Mouse activity was noted in interior service areas. In the furnace and mechanical room, the foundation walls were constructed of stone with deteriorated mortar. Multiple gaps were observed where rodents could travel laterally between attached units. Additional vulnerabilities were identified around utility penetrations, cabinetry voids, and an exterior grate.
Cause Analysis
The issue was driven by the building’s age, shared-wall construction, and crumbling mortar within the stone foundation. These conditions created interconnected pathways that allowed mice to move between units, particularly from areas associated with food use. Unsealed penetrations further increased accessibility.
Treatment / Removal
Licensed rodent control was performed in accordance with Ontario Ministry of the Environment guidelines. Tamper-resistant bait stations were installed in strategic interior and exterior locations based on observed activity and structural layout. Stations were secured and positioned to limit non-target access while addressing active rodent pressure.
Exclusion & Repairs
Following approval, exclusion work was completed to block identified access points:
- Approximately 64 linear feet of foundation gaps sealed using galvanized steel micro-mesh
- Cabinet void exclusion completed with galvanized steel micro-mesh
- Three utility line penetrations sealed with a combination of sealant and galvanized steel micro-mesh
- Exterior grate screened with galvanized steel micro-mesh
Installed materials were mechanically fastened and fitted around existing services to maintain function while preventing rodent entry.
Outcome & Confirmation
At the follow-up visit, the customer reported a dramatic reduction in rodent activity. Inspection confirmed that previously identified pathways between attached units were no longer accessible. No further mouse movement between structures was reported at the time of service completion.
Technician Notes
Richard completed both the inspection and exclusion work, with particular focus on shared structural areas where rodents were migrating between units. All identified access points were addressed as planned, and post-service conditions were consistent with successful exclusion.
This work was completed by our Toronto pest control team. For pest control inquiries in Toronto, contact 647-496-2211.