Fogging Disinfection
Professional Fogging Disinfection Services in Toronto & the GTA
Sentinel Maintenance Inc. (SMI) provides professional fogging disinfection services to commercial and industrial facilities throughout Toronto and the GTA - Canadian-owned since 1989, with 100+ trained technicians using EPA-registered, Health Canada-approved disinfectants. Standard cleaning addresses surfaces you can see and reach. Fogging disinfection goes further - dispersing a fine antimicrobial mist that penetrates hard-to-reach areas, treats entire volumes of air, and delivers consistent, uniform coverage across large spaces in a fraction of the time manual methods require. Call 416-340-8765 to discuss your facility's requirements.
Fogging Disinfection
Our fogging disinfection service uses specialized equipment to create a fine mist that penetrates hard-to-reach areas, providing comprehensive sanitization for entire spaces.
What Is Fogging Disinfection?
Fogging disinfection uses specialized equipment to convert liquid disinfectant into a fine mist - particles small enough to remain airborne and settle on surfaces throughout an entire room or facility. Unlike spray-and-wipe methods, fogging reaches HVAC vents, ceiling fixtures, behind equipment, and other areas that manual cleaning cannot consistently cover.
SMI uses electrostatic and thermal fogging equipment depending on the application. Electrostatic fogging applies a positive charge to disinfectant particles, causing them to wrap around and adhere to surfaces for more complete coverage. Thermal fogging produces a denser mist suited for larger open spaces and odour control applications. Our technicians assess each facility and select the appropriate method and disinfectant formulation for the environment.
When Fogging Disinfection Is Used
Fogging is not a replacement for routine cleaning - it is a complement to it, used in specific situations where comprehensive disinfection of an entire space is required. Common applications include:
Post-Illness or Outbreak Response
When a confirmed illness - influenza, norovirus, or other communicable disease - has spread through a workplace, fogging provides rapid, comprehensive disinfection of the entire affected area. It is faster and more thorough than manual disinfection for large spaces and reduces the risk of secondary transmission.
Scheduled Preventive Disinfection
High-traffic commercial facilities - office buildings, healthcare facilities, schools, and transit hubs - benefit from periodic fogging as part of a proactive hygiene programme. Scheduled fogging between deep cleaning cycles maintains pathogen control in environments where surface contamination is a persistent concern.
Post-Construction and Renovation
Construction and renovation work generates dust, particulates, and biological contaminants that accumulate throughout a space. Fogging following construction cleaning ensures that airborne matter and surface contamination are addressed before occupancy.
Pre-Occupancy Disinfection
New tenants, returning staff after extended closures, or facilities reopening after remediation work benefit from fogging to establish a clean baseline before regular occupancy begins.
Odour Control Applications
Thermal fogging is also used as part of SMI's odour control service for smoke, fire damage, and biological odour situations. The fogging mist penetrates porous materials and reaches embedded odour compounds that surface cleaning cannot address.
Disinfectants and Safety
SMI uses EPA-registered, Health Canada-approved disinfectants formulated for fogging applications. All products are selected for efficacy against a broad spectrum of bacteria, viruses, and fungi, and are safe for use in occupied commercial environments when applied correctly.
Re-entry times vary by product and application - typically 30 minutes to two hours after treatment. SMI technicians confirm full dissipation and safe conditions before the space is returned to occupancy. Our team follows all relevant WHMIS and occupational health and safety protocols throughout the process.
Industries & Environments We Serve
SMI provides fogging disinfection services to a wide range of commercial and industrial facilities throughout Toronto and the GTA, including:
Service Area
SMI provides fogging disinfection services throughout Toronto and the Greater Toronto Area, including Mississauga, Brampton, Vaughan, Markham, Scarborough, Etobicoke, North York, Oakville, Burlington, and Hamilton. For large-scale industrial disinfection projects, we serve clients across Ontario - contact us to discuss your location and requirements.
Why Choose SMI for Fogging Disinfection
Facility managers throughout Toronto and the GTA choose SMI for fogging disinfection because of our track record, certified products, and equipment range:
Frequently Asked Questions
How is fogging different from regular spray disinfection?
Spray disinfection applied by hand covers surfaces that are directly accessible - desks, counters, door handles. Fogging disperses disinfectant as a fine mist throughout the entire volume of a space, settling on all exposed surfaces including those above, behind, and underneath objects that hand-spraying cannot reach. For large spaces or environments requiring comprehensive disinfection, fogging is significantly more thorough and efficient.
How long does a fogging disinfection treatment take?
Treatment time depends on the size of the space and the application method. A standard commercial office or suite typically takes one to two hours including setup and ventilation time. Larger facilities - warehouses, manufacturing floors, multi-floor buildings - require proportionally more time. SMI will provide a clear timeline and scheduling recommendation following the initial assessment.
How long before we can re-enter the space after fogging?
Re-entry times depend on the disinfectant product used and the size of the treated space. Most commercial applications allow re-entry within 30 minutes to two hours after treatment. SMI technicians confirm that the space has fully ventilated and is safe for re-occupancy before handing it back. We schedule fogging outside of business hours wherever possible to eliminate operational disruption.
Is fogging disinfection safe for our equipment and furnishings?
Yes, when conducted correctly. SMI uses disinfectant formulations approved for use around standard office equipment, furnishings, and finishes. Sensitive electronics or materials requiring special precautions are identified during the pre-treatment assessment and addressed appropriately - either by covering, relocating, or selecting a compatible product.
Do you offer fogging disinfection services across Ontario?
Yes. For large-scale commercial or industrial fogging projects outside the GTA, SMI serves clients across Ontario. Contact us to discuss your location and project scope and we will advise on scheduling and logistics.
How much does fogging disinfection cost in Toronto?
Pricing depends on the size of the facility, the application method required, the disinfectant used, and scheduling requirements. SMI provides free on-site assessments and detailed quotes before any work begins. Call 416-340-8765 to arrange your assessment.
Request a Free Fogging Disinfection Assessment
If your facility requires comprehensive disinfection - whether in response to an illness, as a scheduled preventive measure, or following construction or remediation work - SMI can help. Call 416-340-8765 to speak with our team and arrange a free on-site assessment. We serve Toronto and the GTA and can accommodate after-hours and weekend scheduling.
Contact UsLast updated: September 2026