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They also happen in working buildings. The cleaning has to fit around shifts, deliveries and customers, follow the facility's own safety rules and leave the space ready to operate again on schedule. This page explains the main types of specialty cleaning, combustible dust and high-dusting, cleaning chemicals under WHMIS, silica and construction dust, scheduling around operations, and the insurance and workers' compensation paperwork to ask for before a crew arrives.
Types of industrial cleaning: post-construction, kitchen exhaust, warehouse floors and high-dusting
Each kind of specialty cleaning needs different equipment and a differently trained crew, so ask companies which of these they actually do in-house and which they subcontract.
- Commercial post-construction cleaning: rough, final and touch-up cleans of offices, stores and multi-unit buildings, timed to the general contractor's handover and deficiency list.
- Commercial kitchen exhaust cleaning: degreasing hoods, filters, ductwork and exhaust fans, where built-up grease becomes a fire hazard.
- Warehouse and industrial floors: machine scrubbing and degreasing of sealed or polished concrete, and removing oil, tire marks and residue.
- High-dusting: cleaning rafters, beams, ducts, light fixtures and racking from lifts in warehouses, plants, gyms and atriums.
- Equipment and production areas: cleaning machinery, tanks and process lines under the facility's own lockout and confined-space procedures.
- Biohazard, trauma and odour jobs, which require specific training, protective equipment and controlled waste handling.
Combustible dust and high-dusting in warehouses and industrial buildings
Dust from wood, flour, sugar, plastics, metals and many other materials can burn, and on overhead surfaces it builds up out of sight. The Canadian Centre for Occupational Health and Safety (CCOHS) notes that dust can collect on rafters, roofs, suspended ceilings, ducts, crevices, dust collectors and other equipment. It explains that a first explosion can shake that settled dust into the air, where it ignites in a secondary explosion that is often more destructive than the first. That's why high-dusting is a safety task, not just a cosmetic one.
The method matters as much as the schedule. CCOHS advises against creating dust while cleaning, for example with brooms or compressed air hoses, and says to use only wet methods or vacuums approved for dust collection. Ask a specialty cleaner which vacuums they use for combustible dust, how they keep ignition sources away, and who operates the lifts and fall protection needed to reach high surfaces.
Industrial cleaning chemicals, WHMIS labels and safety data sheets
Industrial cleaning relies on stronger products than household cleaning: heavy degreasers, caustic exhaust cleaners, floor strippers, descalers and disinfectants. In Canadian workplaces these fall under WHMIS, which CCOHS describes as a comprehensive system for providing health and safety information on hazardous products used, handled or stored at work. Hazardous products must carry a supplier label and come with a safety data sheet provided to the purchaser at the time of sale.
CCOHS also sets out the employer's side: workers must be educated about the hazards of the products they use and how to protect themselves, current safety data sheets must be accessible, and the WHMIS education and training program needs to be reviewed annually. For the client, that translates into a few checks before work starts:
- Ask for the safety data sheet of every product the crew will bring on site, and share them with your health and safety representative or committee.
- Confirm the crew has WHMIS training and has been told about chemicals and hazards already present in your building.
- Agree on where products will be stored, mixed and disposed of, away from food, drains and incompatible chemicals.
- Keep ventilation running during stripping, degreasing or disinfecting, and keep occupants out of the area until it's safe to return.
Silica and construction dust: when commercial post-construction cleaning needs extra controls
On commercial projects, cutting, grinding and polishing concrete, masonry, stone and tile throws off dust that can contain crystalline silica. CCOHS warns that inhaling it can harm the lungs and identifies it as a known cause of lung cancer. A specialty crew captures that dust instead of moving it around, with HEPA vacuums and wet methods rather than dry sweeping or leaf blowers, respiratory protection suited to the task, and cleaning scheduled so no one is wiping down one area while cutting continues in the next. Extra controls are warranted when the site has:
- Freshly ground or polished concrete floors, whose fine dust settles on ledges, racking and fixtures.
- Masonry, stone or tile cutting areas, including exterior work near air intakes and open doors.
- Demolition in an older building, where debris should be tested for asbestos and lead before any cleaning starts.
Scheduling specialty cleaning around operations: nights, shutdowns and production
In a working building, the cleaning plan follows the business. Kitchen exhausts are cleaned when the kitchen is closed, warehouse floors during slow shifts or shutdowns, and high-dusting when stock can be covered and people kept out from under the lift. Good results start with a walkthrough with the facility manager before quoting and a written scope listing the areas, methods, access hours and responsibilities.
- Plan major cleans around shutdowns, holidays or night shifts, and book well ahead, since many facilities want the same quiet periods.
- Cover or move stock, equipment and food-contact surfaces before any overhead work begins.
- Coordinate lockout of machines, conveyors and exhaust fans through the facility's own procedures, so nothing can start up while it's being cleaned.
- Arrange keys, alarm codes, security and a named site contact for after-hours work.
- Agree on how the area will be inspected and signed off before operations resume.
Insurance, WSIB clearance and site safety requirements for specialty cleaners
Specialty cleaning happens at height, around chemicals and inside other people's workplaces, so the paperwork matters. Ask for a certificate of commercial general liability insurance, with your business or landlord named as an additional insured if your lease or building rules require it.
In Ontario, the WSIB issues a clearance, a unique number showing that a business, contractor or subcontractor is registered and up to date with it, and only registered businesses in good standing can obtain one. For construction work, the WSIB requires the business hiring a contractor to get a clearance before the work begins and keep it in effect for the length of the job, so confirm with the WSIB whether cleaning on an active construction site falls under that rule. In other provinces, ask the workers' compensation board how to confirm a company's coverage.
- Training records for lifts, fall protection and any lockout or confined-space work the job involves.
- The cleaning company's own safety plan for the site, including emergency contacts for the crew.
- Any site orientation the general contractor or facility requires before workers start.
Industrial & Specialty Cleaning: frequently asked questions
What's the difference between janitorial service and industrial cleaning?
Janitorial crews handle routine cleaning of offices, washrooms and common areas. Industrial and specialty cleaners take on work that needs heavy equipment, stronger chemicals, lifts or specific training, such as kitchen exhausts, high-dusting, warehouse floors and commercial post-construction cleanup.
How often should a commercial kitchen exhaust system be cleaned?
It depends on how much and what kind of cooking the kitchen does: the busier and greasier, the more often. Your local fire department and your insurer can tell you which requirements apply, and it's wise to keep cleaning records on site.
Do specialty cleaning crews need WHMIS training?
Workers who use hazardous products on the job have to be educated about them under WHMIS, and their employer must give them access to current safety data sheets. Ask the company how its crew is trained and for the data sheets of the products it will use.
Can high-dusting be done while a warehouse is operating?
Sometimes, section by section, if the area under the lift is closed off and stock is covered, but off-hours or shutdowns are safer. CCOHS advises cleaning combustible dust with wet methods or approved vacuums rather than blowing it down with compressed air.
How is commercial post-construction cleaning different from a home?
The areas are larger, floors are often industrial, silica and concrete dust are common, high surfaces need lifts, and the schedule is tied to the contractor's handover. Crews also need the site orientation, safety training and insurance the general contractor requires.
Sources
Written by the LokalMatch editorial team. Reviewed by Zubair Afzal on September 10, 2026. How we write and check our guides
