How to Winterize a Vacant Property in Canada: The Professional's Checklist

Why Winterization Is the Most Critical Vacant Property Task

Canada's winters are unforgiving. For an occupied home, a heating failure is an inconvenience. For a vacant property, it can be a financial catastrophe.

A single frozen and burst pipe can release hundreds of litres of water per hour into walls, floors, and ceilings. In a vacant home where no one is present to detect the problem, this can continue for days or weeks. The resulting damage — structural, mechanical, and cosmetic — routinely exceeds $40,000 to $80,000, and in severe cases has totalled over $200,000.

Proper winterization eliminates this risk. Here is the complete professional checklist.

The Complete Winterization Checklist

Plumbing System

• [ ] Shut off the main water supply at the meter or curb stop
• [ ] Drain all water lines — open every faucet (hot and cold) and leave them open until water stops flowing
• [ ] Flush all toilets and drain tank reservoirs completely
• [ ] Add RV-grade antifreeze to toilet bowls, sink P-traps, floor drains, and other drain traps to prevent sewer gas and trap freezing
• [ ] Drain the water heater — attach a hose to the drain valve and flush completely
• [ ] Drain outdoor hose bibs and disconnect all garden hoses
• [ ] Blow out irrigation systems with compressed air if applicable
• [ ] Insulate any pipes in unheated spaces (garage, crawl space, attic) with foam pipe insulation

Heating System

• [ ] Service the furnace or boiler — clean filters, check burners, test ignition
• [ ] If maintaining heat rather than full drain-down: Set thermostat to minimum 15°C (59°F)
• [ ] Install a smart thermostat with remote monitoring and low-temperature alerts
• [ ] Ensure fuel supply — check oil tank levels or verify gas supply is active
• [ ] Test smoke and carbon monoxide detectors — replace batteries

Electrical System

• [ ] Turn off non-essential circuits at the breaker panel
• [ ] Leave the circuit energized for the heating system, smoke detectors, and any monitoring equipment
• [ ] Unplug all appliances to prevent phantom draw and reduce fire risk
• [ ] Install a freeze alarm connected to cellular monitoring

Exterior

• [ ] Clean eavestroughs and downspouts — blocked gutters contribute to ice dams
• [ ] Inspect the roof for damaged or missing shingles that could allow water infiltration under snow load
• [ ] Check and seal any gaps or cracks in the foundation, siding, and around windows/doors
• [ ] Remove dead branches overhanging the structure that could fall under ice load
• [ ] Secure all exterior doors and windows — check weather stripping and locks
• [ ] Store or secure any outdoor furniture, decorative elements, or equipment

Interior

• [ ] Check the attic for adequate insulation and ventilation (prevents ice dam formation)
• [ ] Remove all perishable food from the property
• [ ] Clean and empty the refrigerator and prop the doors open if power will be reduced
• [ ] Document pre-winter condition with comprehensive photographs

Full Drain-Down vs. Maintaining Heat: Which Is Right?

Full drain-down (completely draining all plumbing and adding antifreeze to traps) is ideal when:

• The property will be vacant for an entire winter season
• Utility costs are a concern
• You want the absolute lowest risk profile for insurance purposes

Maintaining heat is preferable when:

• The property may be accessed during winter
• A complete drain-down would be expensive to reverse (e.g., for a property sale)
• The heating system is newer and reliable with monitoring

In most cases, Sentinel Property recommends a full drain-down combined with cellular monitoring as the gold standard for vacant property protection.

The Role of Regular Inspections

Winterization is a one-time event — but monitoring is ongoing. Even a perfectly winterized property should be inspected at minimum every two weeks through the winter months to check for:

• Evidence of unauthorized entry
• Structural damage from ice or snow load
• Heating system failure (if maintaining heat)
• Water damage from roof or foundation infiltration
• Exterior conditions that could create municipal compliance violations

Certification and Documentation

A professionally completed winterization should be documented with a Winterization Certificate that lists every completed action, the technician responsible, and the date. This document serves as:

1. Proof of compliance for your insurance provider
2. Evidence of due diligence if a loss claim is disputed
3. A reference document for spring de-winterization

Sentinel Property provides a signed, timestamped winterization certificate for every client property as standard practice.

Preparing your vacant property for winter? Contact Sentinel Property to schedule professional winterization.