One frozen pipe can shut down an entire commercial building. Water spreads through ceilings, damages electrical systems, destroys inventory, and forces tenants to close. By the time the leak is discovered, the repair bill may be the smallest part of the financial loss.
For Ontario commercial property owners, landlords, and property managers, winter preparation is one of the most effective ways to prevent property damage, reduce liability claims, and protect rental income.
Aviva Canada identifies frozen pipes and excessive rooftop snow accumulation as two recurring causes of commercial property insurance claims during winter. Both can create extensive damage and lengthy repairs.
The best time to protect a commercial property from winter damage is before temperatures reach freezing. Inspecting vulnerable pipes, heating systems, roofs, and walkways early can prevent losses that become much more difficult to control during a winter storm.
This guide covers eight practical steps Ontario property owners should complete before winter, along with the insurance coverage that can protect their investment when something goes wrong.
Commercial Property Insurance in Ontario
Who Should Winterproof Their Commercial Property?
Winter preparation is especially important for owners and managers of:
• Commercial plazas and retail shopping centres
• Office buildings and mixed use properties
• Warehouses and distribution facilities
• Manufacturing plants and industrial buildings
• Apartment buildings and rental properties
• Condominium buildings and common areas
• Medical clinics and professional offices
• Buildings with vacant units or seasonal tenants
Properties in Toronto, Vaughan, Mississauga, Brampton, Hamilton, Kitchener, and throughout Ontario face risks from freezing temperatures, heavy snowfall, ice accumulation, and sudden temperature changes.
Buildings with older plumbing, flat roofs, exposed mechanical systems, or limited weekend occupancy deserve particular attention.
Insurance for Commercial Property Owners
Key Insurance Terms Every Property Owner Should Know
Commercial Property Insurance: Coverage that helps pay for damage to insured buildings, equipment, and contents caused by covered events such as fire, certain water losses, and storms.
Business Interruption Insurance: Coverage that can replace lost business income and certain continuing expenses when a covered property loss interrupts operations.
Loss of Rental Income: Coverage that can replace rental income when a covered event makes insured rental space unusable.
Premises Liability: The legal responsibility a property owner or occupier may have when someone is injured because of unsafe conditions on the premises.
Vacancy Condition: A policy provision that may restrict coverage or impose additional requirements when a building or unit remains vacant for a specified period.
Equipment Breakdown Insurance: Coverage for certain sudden mechanical or electrical equipment failures, including some heating and building systems, depending on the policy.
1. Inspect Your Roof, Gutters, and Drainage Systems
A flat commercial roof can look perfectly fine from the parking lot while developing problems that become expensive after the first heavy snowfall.
Leaves, debris, and blocked drains prevent melting snow from escaping. Water collects on the roof, freezes again, and places additional stress on roofing materials.
As temperatures fluctuate, accumulated snow and ice can also increase the weight carried by the roof.
What property owners should do
• Inspect roof membranes, flashing, seams, and penetrations for damage.
• Clear roof drains, gutters, scuppers, and downspouts.
• Check for standing water or areas with poor drainage.
• Inspect rooftop HVAC supports, vents, and equipment connections.
• Identify areas where snowdrifts may concentrate near parapets or adjacent structures.
• Arrange a professional roof assessment where excessive snow loading is a concern.
Why this matters for insurance
Commercial property insurance may respond to covered roof damage, but deterioration, inadequate maintenance, and certain water losses may be excluded.
For warehouses and industrial buildings, roof damage can also affect inventory, production equipment, and tenant operations.
What to document: Keep inspection reports, photographs, repair invoices, and records of drainage maintenance.
2. Protect Plumbing and Water Lines From Freezing
Frozen pipes are among the most disruptive winter risks for commercial property owners.
Pipes are especially vulnerable in areas that receive little heat or experience cold air entering from outside.
Common problem areas include:
• Mechanical rooms
• Parking garages
• Loading docks
• Exterior walls
• Unheated stairwells
• Ceiling spaces
• Vacant commercial units
• Storage rooms near exterior doors
What property owners should do
Start by identifying pipes exposed to low temperatures.
Insulate vulnerable water lines and repair damaged insulation. Test heat tracing systems where installed, and arrange appropriate heating for areas that could fall below safe operating temperatures.
Locate and label the main water shutoff valves. Building staff should know how to access them immediately.
Consider installing monitored water leak detectors in mechanical rooms, beneath critical plumbing, and in spaces containing expensive equipment.
Why this matters for insurance
A burst pipe may be covered under commercial property insurance when the loss meets the policy conditions.
However, frozen pipe claims can become complicated when buildings are unheated, vacant, or inadequately maintained.
The Insurance Bureau of Canada recommends insulating exposed pipes, maintaining heat, and knowing where water shutoff valves are located.
What to document: Plumbing inspections, insulation improvements, temperature monitoring records, and maintenance work orders.
3. Service Your Heating Systems Before Winter
A heating system failure during January can become a property insurance claim before anyone notices that the temperature is dropping.
This is especially dangerous in commercial buildings where different areas receive different levels of heating.
A retail plaza might have heated storefronts but poorly heated rear storage rooms. An industrial building might have adequate production floor heating but exposed plumbing near loading docks.
What property owners should do
Schedule a qualified HVAC contractor to inspect heating equipment before winter.
The inspection should include:
• Furnaces, boilers, and rooftop heating units
• Thermostats and temperature controls
• Filters and air distribution systems
• Pumps and circulation systems
• Ventilation and exhaust equipment
• Mechanical equipment serving vulnerable areas
Install temperature monitoring where a heating failure could cause frozen pipes or damage to equipment.
For larger properties, remotely monitored temperature alarms can provide warning before temperatures become dangerous.
Consider backup power
Properties that rely on electrically powered heating equipment, pumps, or building controls should evaluate backup power arrangements.
A winter power outage can disable the very systems needed to prevent freezing.
What to document: Annual service records, equipment inspections, emergency repair contacts, and monitoring procedures.
4. Inspect Fire Sprinkler and Suppression Systems
One of the most overlooked winter exposures is frozen fire sprinkler piping.
Commercial buildings often have sprinkler systems running through spaces that receive less heat than occupied areas.
If water freezes inside the system, pipes can rupture and cause extensive damage. A compromised system may also reduce the building's fire protection.
What property owners should do
Have a qualified fire protection contractor inspect the system before freezing weather.
Important areas include:
• Sprinkler piping near exterior walls
• Loading dock areas
• Parking structures
• Sprinkler valve rooms
• Fire pump rooms
• Stairwells and unheated spaces
• Dry sprinkler system drainage points
Wet sprinkler systems generally require temperatures of at least 4°C in areas containing water filled piping. Insurers also recommend checking insulation, heat tracing, and dry system drainage before severe cold arrives.
Why this matters for insurance
Fire protection systems are important underwriting considerations for commercial property insurance.
An impaired sprinkler system can increase both fire risk and water damage exposure.
Never shut down or drain a fire protection system without appropriate professional supervision and the required notification procedures.
What to document: Inspection certificates, deficiencies, completed repairs, and records of temperature monitoring.
5. Finalize Your Snow Removal Contract Before the First Snowfall
Hiring a snow removal contractor does not automatically remove a property owner's liability exposure.
In Ontario, the Occupiers' Liability Act requires occupiers to take reasonable care to keep people entering their premises reasonably safe. This can include owners, tenants, and property managers who control different parts of a building or property.
If someone slips on ice outside your building, the claim may involve the property owner, property manager, snow removal contractor, and their insurers.
What a snow removal contract should address
Your agreement should clearly identify:
• Which areas require snow and ice removal
• When service must begin
• Who monitors changing weather conditions
• Whether salting and deicing are included
• Who responds to refreezing after an initial service
• Emergency response expectations
• How completed work is documented
For commercial plazas, clarify whether the contractor is responsible for storefront entrances, pedestrian pathways, loading docks, and parking areas.
Verify contractor insurance
Request a certificate of insurance and confirm that the contractor's liability coverage reflects snow and ice operations.
Review any additional insured requirements and ensure the policy wording supports them.
Keep records of service visits, timestamps, weather conditions, and photographs.
Snow Removal Contractor Insurance
6. Prepare Entrances, Walkways, and Parking Areas for Ice
A customer slipping on an icy walkway can create a significant liability claim even when the physical injury occurs in seconds.
Ontario property managers should pay particular attention to areas where snow melts during the day and freezes again overnight.
Common problem areas
• Storefront entrances
• Pedestrian ramps
• Parking lot crossings
• Loading areas
• Stairways
• Accessible entrances
• Drainage areas where water collects
What property owners should do
Inspect walking surfaces for uneven pavement, damaged steps, loose handrails, and poor drainage.
Make repairs before winter when conditions are easier to manage.
Ensure exterior lighting is functional, especially in parking areas and along pedestrian routes.
Install appropriate entrance matting to reduce water accumulation inside buildings.
Establish an inspection routine that continues between scheduled snow removal visits.
Why documentation matters
A slip and fall claim may involve allegations that the owner failed to inspect, maintain, or respond to a dangerous condition.
Maintenance records can establish when a hazard was identified and what action was taken.
Commercial general liability insurance may help with legal defence costs and covered settlements arising from premises injury claims.
Commercial General Liability Insurance
7. Protect Vacant Units and Buildings With Limited Occupancy
Vacant units can create greater winter exposure because problems may remain undiscovered.
Consider a commercial plaza with one empty retail unit. The occupied stores maintain normal temperatures, but the vacant unit has its thermostat turned down.
A frozen pipe bursts over a weekend. Water spreads into neighbouring businesses before the building manager discovers the leak.
A single vacant unit can therefore create damage affecting several tenants.
What property owners should do
• Maintain appropriate heating in vacant units.
• Establish documented inspection schedules.
• Check doors, windows, and weather seals for cold air infiltration.
• Monitor temperatures remotely where appropriate.
• Drain and winterize unused domestic plumbing when appropriate and professionally arranged.
• Confirm that emergency contacts have access to vacant spaces.
• Review whether fire and security systems remain operational.
The insurance issue many owners miss
Commercial property insurance policies can contain vacancy or unoccupancy provisions.
These provisions may affect coverage for water damage, vandalism, theft, and other losses.
A property that becomes vacant during the policy term may require notification to the insurer or changes to the coverage structure.
What to document: Vacancy dates, inspection records, heating arrangements, and communications with your insurance broker.
8. Build a Winter Emergency Response Plan
You cannot prevent every winter storm, but you can control how quickly your team responds.
A delayed response is often what turns a manageable incident into a major commercial property claim.
Imagine a pipe bursting at 2 a.m. inside a commercial building. The maintenance manager is unavailable, nobody knows which contractor to call, and the water shutoff valve is locked inside a mechanical room.
By morning, the damage has spread across multiple floors.
What your emergency plan should include
Assign responsibility for responding to:
• Frozen or burst pipes
• Heating failures
• Roof leaks and water intrusion
• Power outages
• Heavy snow accumulation
• Fire sprinkler system failures
• Slip and fall incidents
Maintain a contact list for emergency plumbers, HVAC contractors, restoration companies, electricians, roofing contractors, and snow removal providers.
Keep that information accessible to authorized staff outside the building.
Prepare for business interruption
A commercial property loss can create several financial problems at once.
Building repairs may be covered, but tenants could lose access to their premises for weeks. A property owner may also lose rental income while continuing to pay financing costs and other expenses.
Business interruption and loss of rental income coverage can help protect cash flow after a covered loss.
Review the amount insured and the period of coverage against realistic repair timelines.
Business Interruption Insurance
Does Commercial Property Insurance Cover Frozen Pipes and Winter Storm Damage?
Commercial property insurance in Ontario can cover certain winter damage, but the cause of loss and policy wording determine how coverage responds.
|
Winter loss scenario |
Typical insurance consideration |
|---|---|
|
A frozen pipe bursts and damages the building |
May be covered if policy conditions are met |
|
Heavy snow causes sudden roof damage |
May be covered under applicable property coverage |
|
A customer slips on an icy walkway |
Commercial general liability may respond |
|
A property owner loses rent following covered water damage |
Loss of rental income coverage may respond if purchased |
|
A boiler fails because of a covered mechanical breakdown |
Equipment breakdown coverage may respond |
|
A vacant building suffers frozen pipe damage |
Vacancy and heating conditions may restrict coverage |
|
A roof deteriorates gradually because of poor maintenance |
Wear and tear and deterioration are commonly excluded |
The critical distinction is between an insured event and a maintenance problem.
Commercial insurance generally protects against covered fortuitous losses. It is not intended to replace routine maintenance or pay to correct gradual deterioration.
How Much Does Winter Risk Affect Commercial Property Insurance Costs?
Winter exposure can influence both insurance premiums and underwriting terms, particularly for buildings with previous water damage, inadequate heating, older infrastructure, or recurring maintenance problems.
Insurers may ask:
• How old is the building?
• When were the roof, plumbing, and heating systems last updated?
• Has the building experienced frozen pipe or water damage claims?
• Are vacant spaces inspected and heated?
• Is snow removal handled by an insured contractor?
• Are fire sprinklers protected against freezing?
• Are temperature and water leak alarms monitored?
• What repairs or improvements have been completed since the last claim?
Underwriters also consider location, building construction, occupancy, claims history, replacement values, and selected deductibles.
A documented winter maintenance program can support a more favourable underwriting assessment, although premium reductions are not guaranteed.
The Insurance Bureau of Canada recommends documenting risk management measures and keeping coverage updated as assets and exposures change.
Common Mistakes That Lead to Winter Insurance Claims
Many commercial property losses become more expensive because of preventable management issues.
Common mistakes include:
• Waiting until the first snowstorm to inspect the building.
• Turning down the heat in vacant areas without checking plumbing exposure.
• Ignoring blocked roof drains and recurring water accumulation.
• Failing to service sprinkler systems before freezing temperatures.
• Hiring snow removal contractors without clear responsibilities.
• Maintaining no written record of inspections or repairs.
• Assuming all frozen pipe or water damage claims are automatically covered.
• Forgetting to update building values and loss of rental income limits.
Commercial Property Winter Readiness Checklist
Use this checklist before temperatures reach freezing.
• Roof inspected, with drains and gutters cleared.
• Exposed water lines insulated and shutoff valves identified.
• Heating systems serviced and temperature monitoring tested.
• Fire sprinklers inspected for freezing exposure.
• Snow removal contract confirmed and contractor insurance verified.
• Walkways, stairs, parking areas, and exterior lighting inspected.
• Vacant units heated, monitored, and inspected.
• Emergency response contacts updated and insurance coverage reviewed.
For property managers handling multiple buildings, maintain a separate checklist and completion record for every address.
Frequently Asked Questions
When should Ontario commercial property owners start winter preparation?
Ideally, begin inspections in early autumn and complete critical repairs before overnight temperatures approach freezing. Roof, plumbing, HVAC, and snow removal work should be arranged before contractors become busy with winter emergencies.
Does commercial property insurance cover frozen pipes in Ontario?
Often, but coverage depends on the circumstances and policy conditions. Frozen pipe damage may be restricted when buildings are vacant, inadequately heated, or subject to specific maintenance requirements.
Does insurance cover roof damage caused by heavy snow?
Commercial property insurance may cover sudden damage caused by excessive snow or ice loading. Coverage depends on the policy and cause of loss. Gradual deterioration and maintenance problems are commonly excluded.
Can a landlord be sued if someone slips on ice outside a commercial building?
Yes. Ontario's Occupiers' Liability Act establishes duties relating to the reasonable safety of people entering premises. Hiring a snow removal contractor does not automatically eliminate every potential liability exposure.
Is a snow removal contractor's insurance enough to protect the property owner?
No. A property owner should maintain appropriate premises liability insurance. The contractor's insurance provides additional protection for claims arising from the contractor's covered operations.
Does business interruption insurance cover a winter power outage?
Not automatically. Standard property business interruption coverage commonly requires insured physical damage. Utility interruption extensions may provide additional protection, subject to policy conditions.
How can landlords reduce commercial property insurance premiums before winter?
Focus on documented building maintenance, water leak prevention, heating reliability, snow removal procedures, and repairs addressing previous claims. These measures can reduce losses and may improve insurance terms.
What should property managers review at renewal?
Review building replacement values, water damage coverage, sewer backup, equipment breakdown, premises liability limits, loss of rental income, vacancy provisions, and deductibles.
Request a Commercial Property Insurance Quote or Book a Meeting
Winter damage can be expensive, particularly when one incident affects multiple tenants, buildings, or business operations.
Boardwalk Insurance helps commercial property owners, landlords, and property managers across Ontario review their coverage, identify gaps, and compare insurance options that reflect their actual property exposure.
If you own or manage commercial property in Toronto, Vaughan, Mississauga, Oakville, Hamilton, or elsewhere in Ontario, request a commercial property insurance quote or book a meeting with Boardwalk Insurance before winter.
What we need from you:
• Property addresses and building occupancy types
• Building age, construction details, and major updates
• Current commercial property insurance policies and renewal dates
• Building replacement values and annual rental income
• Previous water damage, frozen pipe, roof, or liability claims
• Snow removal and property maintenance arrangements
• Details of vacant units, heating systems, and existing loss prevention measures
