"Zero tolerance" is a phrase contractors often run into in commercial snow contracts, and it is loosely defined. We found no legal or industry standard definition that applies across Canada. It is a contract term, and it means whatever the contract you sign says it means.
That is exactly why it deserves careful reading. A phrase that sounds like marketing can become the standard your work is measured against after someone falls.
General information only, not legal or insurance advice. Rules change; confirm with the regulator or agency named on this page, a lawyer for your specific situation, and your broker.
What Zero Tolerance Usually Means
In general industry use, a zero tolerance service level describes a site that is kept clear of accumulation, often with no trigger depth. Instead of waiting for a set amount of snow before dispatching crews, the contractor is expected to plow, salt or both as needed, including during a storm.
Because we found no authoritative definition, the details vary widely from one contract to the next. Some examples of what the wording might cover:
- whether crews must be on site during snowfall or only after it ends
- whether the standard applies to parking areas, walkways or both
- whether freezing rain, frost and refreeze are included
- how quickly the site must be clear after a storm
- whether the contract promises bare pavement, or only that the site is treated
Do not assume. Read the service level clause, the definitions section and any schedules, and ask the client to put anything vague in writing.
Why It Matters for Liability
In a slip and fall claim, courts look at what was reasonable in the circumstances. The Supreme Court of Canada's decision in Waldick v. Malcolm, [1991] 2 S.C.R. 456, found occupiers liable where they did not clear ice they could anticipate, noting they "could have cleared the ice, salted or sanded a pathway."
A contractor who has promised in writing to keep a site clear at all times may find that promise used to measure its work. If the contract promises more than is realistically achievable in a severe storm, the gap between the promise and reality can become the centre of a claim. See slip and fall claims.
How It Affects Your Insurance
Insurers price snow risk partly on the service promises you make. A book of zero tolerance contracts on high traffic sites is a different risk from a book of residential driveways with a trigger. Your broker will want to know:
- which contracts carry zero tolerance or similar service levels
- the types of properties involved, such as retail and plaza sites or institutional sites
- whether you salt, and how you record it. See salting and sanding insurance
- any indemnity or hold harmless clauses tied to the service level
Undisclosed service promises can create problems when a claim arrives, so share the actual contracts with your broker, not a summary.
Pricing and Resources
A zero tolerance site may need a crew or truck assigned to it for the whole storm, pre treatment before snowfall, repeated salting and monitoring overnight. That takes equipment, labour and material you cannot use elsewhere. See how to price snow removal contracts.
Salt supply deserves special attention. SIMA says salt supply disruption is "increasingly plausible given supply chain disruptions, extreme weather cycles and regional shortages" and advises contract clauses to deal with shortages. A contract that demands constant salting with no shortage clause leaves you exposed if supply tightens.
Questions to Ask Before You Sign
- What exactly does "zero tolerance" mean in this contract, in measurable terms?
- Does it apply to all areas, or only to entrances and walkways?
- What response time applies during and after a storm?
- Who decides when to salt, and is salt billed separately?
- What happens if salt is unavailable?
- Is there an indemnity clause, and how broad is it?
- What insurance limits and endorsements does the contract require?
- What records does the client expect you to keep?
A lawyer can review the contract wording. A broker can tell you whether your policy responds to the obligations you are taking on. Our snow removal contract template and snow removal contracts and insurance guide cover the clauses to watch.
Protect Yourself With Records
Whatever the service level, detailed logs are your best evidence: arrival and departure times, weather, what was plowed, what was salted and how much. See site logs and documentation and the snow log template.
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Sources
- Northern Law: Waldick v. Malcolm summary
- SIMA: Salt supply shortage contract management
- SIMA: Triggered
Frequently Asked Questions
What does zero tolerance mean in a snow contract?
We found no single legal or industry definition. It generally describes a service level where the site is kept clear of accumulation, often with no trigger depth, but the exact meaning depends on the contract wording.
Are zero tolerance contracts harder to insure?
Insurers look at the service promises you make, the sites involved and how you document your work. Share the actual contracts with your broker so they can present the risk accurately.
Can I negotiate a zero tolerance clause?
Many contractors ask for measurable definitions, realistic response times and a salt shortage clause. A lawyer can help with wording.
Does zero tolerance mean I am liable for every fall?
Not automatically. Liability depends on the facts, what was reasonable and the contract terms, but an unrealistic promise can make your position harder.