One of the most confusing parts of a snow removal contract is the trigger depth—the amount of snow that has to fall before your service provider clears your driveway or walkways. Many homeowners in Ontario are surprised to wake up after a storm and see their driveways untouched, even though it looks like plenty of snow fell.
Here’s how trigger depths work, why they matter, and what you should look for in your contract.
What Is Trigger Depth?
Trigger depth is the minimum snow accumulation that “triggers” a plow or shovel crew to come out. In most residential contracts, this is set between 2 cm and 5 cm.
- 2 cm Trigger Depth – Almost every snowfall gets cleared. Best for families, seniors, or anyone who wants maximum convenience.
- 5 cm Trigger Depth – Crews wait until more snow builds up. Cheaper, but driveways can get slippery or packed down.
- Custom Depths – Some companies let you choose your trigger depth when signing up.
Why Trigger Depth Affects Pricing
A lower trigger depth means crews will visit more often, so contracts are priced higher. A higher trigger depth lowers the number of visits and brings the cost down. For example:
- 2 cm Trigger – Seasonal contract: $900–$1,200
- 5 cm Trigger – Seasonal contract: $700–$900
How It Impacts Homeowners
- Safety – Seniors or families with kids benefit from a lower trigger depth since surfaces stay clear more often.
- Driveway Wear – Packed-down snow that isn’t cleared quickly can freeze into ice, making it harder to remove later.
- Convenience – If you leave early for work, even 3 cm of snow can be frustrating.
- Budget – A higher trigger depth saves money but may mean shoveling light snow yourself.
Questions to Ask Before Signing
- What’s the standard trigger depth in the contract?
- Can I adjust it for my needs?
- Is salting included for light snowfalls that don’t meet the trigger?
- Will the crew come out if freezing rain leaves ice but no snow?
Final Takeaway
When comparing snow removal services, don’t just look at the price—check the trigger depth. That small detail can be the difference between a clear driveway every morning or waking up to a surprise layer of snow.
