The Liability: Occupiers' Duty of Care
Ontario's Occupiers' Liability Act places a duty on the occupier of a premises to take reasonable care that people entering are reasonably safe. "Occupier" is broad — it can include the property owner, the tenant in control of a space, and the property manager. In winter, that duty squarely includes snow and ice, both outside and tracked inside.
Two things are worth understanding. First, the standard is reasonable care, not perfection — you are not expected to guarantee no one ever slips, but you are expected to take, and be able to show, reasonable steps. Second, Ontario law generally requires a person injured by snow or ice to give written notice within 60 days to pursue a claim — but that procedural rule does not erase the underlying duty, and it does not help you if you took no reasonable steps in the first place. The practical defence is the same either way: act reasonably, and document that you did.
The legal test is whether you took reasonable, documentable steps — not whether a fall occurred. A storm-day log showing entrance checks, mopping rounds, and wet-floor signage is often the difference between a defensible claim and an indefensible one.
Where Winter Falls Actually Happen Indoors
Snow clearing and salting the lot is the obvious half, usually handled by a winter maintenance contractor. The half that property managers underestimate is inside the door. Hundreds of wet boots an hour carry snow, slush, and salt across the threshold, and the entrance floor — often hard tile or polished surface — turns into a skating rink within minutes of a storm starting. That entrance zone, plus lobby and corridor runoff, is where the bulk of indoor winter falls occur.
This is a cleaning-and-presence problem, and it responds to four things working together:
The Indoor Winter-Safety Toolkit
Matting and the Day Porter: The Two Biggest Levers
A correctly specified three-zone matting system is the cheapest, highest-impact winter safety upgrade most buildings can make. A coarse scraper mat knocks snow and grit off boots at the threshold, a mid-zone mat absorbs the bulk of the water, and a final wiper mat dries the soles before traffic reaches the lobby floor. The catch is maintenance: a saturated mat is worse than no mat, so mats have to be swapped or vacuumed through the day during heavy weather — which is exactly where the day porter comes in.
A day porter on-site through a storm changes the math entirely. Instead of slush accumulating until the night crew arrives, entrances get mopped on rounds, mats get swapped before they flood, signage goes out the moment a floor is wet, and spills are handled in minutes. For any building with meaningful foot traffic, daytime presence during winter weather is the single most effective way to keep the entrance safe while it's actually being used.
Don't Forget the Floors Themselves
Winter salt is not just a slip hazard — it's hard on the floor. Tracked-in de-icing salt leaves a white alkaline residue that dulls and etches finishes, hazes VCT and polished surfaces, strips gloss, and leaves crusty, abrasive residue in carpet. Frequent neutralizing and removal protects both safety and the asset. The slip-and-fall side is what this guide covers; for the floor-finish side — scrubbing schedules, refinishing, and protecting the surface through the season — see our companion guide on commercial winter floor care in Ontario.
Building a Defensible Winter Cleaning Routine
Put together, a defensible program is simple to describe and hard to fake: matting that's specified and maintained, daytime presence during weather, signage and prompt drying, salt removal, and a dated log of all of it. The documentation is the part most buildings skip — and the part that matters most if a claim is ever filed. At Zusashi Maintenance, our day porter and floor maintenance programs are built for exactly this: storm-day entrance coverage, matting maintenance, salt removal, and time-stamped service logs that give property managers a record of reasonable care. We're WSIB compliant and $5M insured, with no long-term contracts. It pairs naturally with our property management cleaning program.
Winter Slip-and-Fall Prevention — Frequently Asked Questions
Who is liable for a slip and fall at an Ontario commercial property in winter?
Under Ontario's Occupiers' Liability Act, the occupier of a premises — which can include the owner, the tenant in control of the space, and the property manager — has a duty to take reasonable care to keep people on the premises reasonably safe, including from winter snow and ice. Liability turns on whether reasonable steps were taken and can be documented. Note that Ontario law generally requires written notice within 60 days for a snow- or ice-related injury claim, but that notice rule does not remove the underlying duty of care.
How does cleaning reduce winter slip-and-fall risk indoors?
Most winter falls inside a building happen in the first few metres past the door, where tracked-in snow, slush, and salt turn floors slippery. A proper entrance matting system, prompt removal of water and slush, wet-floor signage, and a day porter circulating during storms address exactly that zone. Documented, time-stamped cleaning rounds also create the record that demonstrates reasonable care was taken, which matters if a claim is ever made.
What is a three-zone entrance matting system?
A three-zone matting system manages tracked-in moisture in stages: a coarse scraper mat outside or at the threshold knocks off snow and grit; a mid-zone mat absorbs the bulk of the water; and a final wiper mat dries the soles before foot traffic reaches the building floor. Properly sized and maintained mats are one of the most effective and lowest-cost ways to keep entrance floors dry and reduce slip risk through the winter.
Does documented cleaning help defend a slip-and-fall claim?
Yes. The legal standard is reasonable care, not a guarantee that no one ever falls. Time-stamped logs showing entrance checks, mopping rounds, mat maintenance, and wet-floor signage during a storm are evidence that the occupier acted reasonably. Without records, it becomes one person's word against another's. A cleaning provider that issues dated service logs gives you that paper trail as a routine output, not an afterthought.
How does road salt damage commercial floors?
Tracked-in de-icing salt leaves a white alkaline residue that dulls finishes, etches and pits hard surfaces, and breaks down floor finish and grout over a season. On VCT and polished floors it causes a chalky haze and can strip gloss; on carpet it leaves crusty residue that abrades fibres. Frequent neutralizing and removal during winter protects both safety and the floor itself — a deeper floor-finish program is covered in our winter floor-care guide.
Cut Your Winter Slip-and-Fall Risk This Season
Zusashi Maintenance keeps GTA entrances safe through winter — day-porter storm coverage, three-zone matting maintenance, salt and slush removal, wet-floor signage, and time-stamped service logs that document reasonable care. WSIB compliant, $5M insured, no long-term contracts. Serving Ontario property managers since 2007.