Table of Contents
Job Overview
Location: Toronto, Ontario
Structure: Two-story detached house
Problem: Mouse activity reported inside the home
Service: Mice removal and structural exclusion
Visits: 3
Summary
We completed a three-visit mice removal project at a detached home in Toronto after the homeowner reported mouse activity inside the residence. Our licensed exterminator, Richard, confirmed the activity during the inspection, implemented an interior treatment program, and identified several exterior structural gaps that could allow mice to enter. The project concluded with comprehensive exclusion work targeting deck, foundation, utility, and door entry points, followed by confirmation that mouse activity had ceased.
Background / Property Context
The property included multiple exterior utility penetrations, foundation gaps, and openings around an exterior basement entrance. These types of structural transitions can provide mice with sheltered access into wall cavities and lower levels of a home if left unsealed.
Customer Concern
The homeowner was hearing and observing mouse activity inside the home and wanted the source of the problem identified and permanently addressed. They also requested repairs to prevent future rodent entry.
Inspection & Findings
Richard completed a full inspection of the accessible interior and exterior of the property.
The inspection identified:
- Evidence of mouse activity inside the home.
- Gaps around foundation joints and masonry.
- Openings surrounding utility line penetrations.
- Gaps around exterior windows and doors.
- Areas beneath the front deck requiring repair.
The photographs show exposed structural gaps around a basement entrance before repairs, utility penetrations with visible openings, sections of deteriorated masonry requiring sealing, galvanized steel mesh installed around vulnerable areas, repaired deck sections, completed foundation sealing, and exclusion work surrounding utility services.
Cause Analysis
Mice are capable of entering buildings through very small structural openings around foundations, utility penetrations, doors, and windows. As buildings settle and exterior materials age, these gaps can expand enough to provide consistent access into wall cavities and interior living spaces. Addressing both the active infestation and the structural entry points helps reduce the likelihood of future activity.
Treatment / Removal
During the first visit, Richard confirmed mouse activity and implemented an interior treatment program.
Work completed included:
- Full inspection to locate active travel routes and entry points.
- Placement of tamper-resistant bait stations containing commercial-grade rodenticide in interior areas with signs of activity.
- Identification and documentation of structural deficiencies requiring exclusion.
- Preparation of an exclusion proposal for permanent repairs.
All rodenticide applications were performed by a licensed exterminator in accordance with Ontario Ministry of the Environment guidelines.
Exclusion & Repairs
Following approval, we completed comprehensive exclusion work to prevent future mouse entry.
Repairs included:
- Approximately five feet of front deck repairs.
- Sealing approximately two feet of foundation gaps using mortar or concrete.
- Sealing three utility line penetrations using galvanized steel mesh and exterior-grade silicone.
- Installation of approximately ten feet of galvanized steel mesh with sealant around windows and exterior door areas.
- Placement of two additional exterior tamper-resistant rodent bait stations to support ongoing monitoring.
Outcome & Confirmation
During the final visit, the homeowner reported that no further mouse activity had been heard or observed. All identified entry points had been permanently sealed, and the completed exclusion work was inspected to confirm its effectiveness. The homeowner was satisfied with the completed service.
Technician Notes
Richard completed the inspection, treatment, exclusion work, and final confirmation over three visits. The project focused on eliminating active mouse activity while reinforcing multiple vulnerable exterior entry points using galvanized steel mesh, mortar, silicone sealant, and deck repairs to provide long-term protection against re-entry.