WETT Inspection Checklist for Ontario Wood Cook Stove Owners: How to Prepare and What to Expect

Owning a wood cook stove gives you something few modern appliances can offer. It allows you to heat your home, prepare meals and maintain greater energy independence using one dependable appliance. For rural homeowners, cottage owners, homesteaders and families interested in off-grid living, a quality wood cook stove can become the true heart of the home.

However, a wood cook stove is also a solid-fuel-burning appliance. Its installation includes high operating temperatures, combustible materials, stovepipes, chimneys and other components that must work together safely. Correct installation and ongoing maintenance are essential for protecting your household and getting the best performance from your stove.

That is where a WETT inspection can become important.

Homeowners may be asked to obtain a WETT inspection when installing a new wood cook stove, purchasing a home with an existing wood-burning appliance, renewing or changing home insurance, or investigating concerns with an older installation. Even when an inspection has not been specifically requested, having the system examined by a properly qualified professional can provide valuable information about its condition.

If you are preparing for a WETT inspection in Ontario, knowing what to expect can make the process much easier. This guide explains what a WETT inspection is, what an inspector may examine, how you can prepare and what to do once you receive the report.

What Is a WETT Inspection?

WETT stands for Wood Energy Technology Transfer Inc., a Canadian non-profit training and education organization focused on the safe installation, inspection, maintenance and use of wood-burning systems.

WETT does not inspect or approve individual stoves itself. Instead, it provides training and certification to professionals who work with wood-burning appliances and related systems. Depending on their qualifications, these professionals may perform inspections, installations, maintenance, chimney sweeping or technical evaluations.

A WETT inspection is an assessment of a wood-burning system conducted by a WETT-certified professional. The system being assessed may include a:

• Wood cook stove
• Conventional wood-burning stove
• Fireplace
• Fireplace insert
• Pellet appliance
• Factory-built chimney
• Masonry chimney
• Stovepipe or flue pipe
• Hearth and wall-protection system

The inspector documents visible components and compares the installation with applicable codes, standards, manufacturer instructions and accepted installation practices.

Following the inspection, the homeowner normally receives a written report documenting the system and the inspector’s observations. This report may be requested by an insurance provider, potential homebuyer, mortgage professional or other interested party.

A Stove Is Not “WETT Certified”

One of the most common misunderstandings concerns the phrase “WETT-certified stove.”

WETT certifies people who have completed the required training and experience. It does not certify individual appliances, chimneys, homes or installations. A wood cook stove can be certified to an applicable product standard, and a WETT-certified professional can inspect its installation, but the stove itself does not become WETT certified.

It is more accurate to say:

• The stove was inspected by a WETT-certified professional.
• The homeowner received a WETT inspection report.
• The installer or inspector holds a valid WETT certification.

This distinction matters when speaking with an insurer or arranging an inspection. If an insurance provider asks for “WETT certification,” clarify whether it wants a current inspection report, a particular inspection level, photographs, proof of corrective work or another form of documentation.

Is a WETT Inspection Legally Required in Ontario?

A WETT inspection is not automatically a legal requirement for every wood-burning appliance in every Ontario home. However, wood cook stove installations must still comply with applicable building and fire-safety requirements.

Ontario’s Fire Code addresses the installation of solid-fuel-burning appliances and refers to relevant installation standards. Municipal building departments may also require a building permit and inspections for a new wood stove, cook stove or chimney installation.

These municipal and regulatory requirements are separate from a WETT inspection. Obtaining one does not necessarily replace a building permit or municipal inspection, and receiving municipal approval may not satisfy an insurer that has specifically asked for a WETT report.

Requirements can differ according to the municipality, type of installation and insurance provider. Before installing or replacing a wood cook stove, contact your municipal building department and insurance company to determine what documentation is required.

When Might You Need a WETT Inspection in Ontario?

Several situations can lead to a request for a WETT inspection.

Installing a New Wood Cook Stove

A new wood cook stove needs to be installed with appropriate clearances, floor protection, venting and chimney components. Once installation is complete, a WETT inspection may be requested to document the appliance and installation.

It is best to discuss inspection and insurance requirements before the stove is installed. This gives the homeowner, supplier and installer an opportunity to identify relevant requirements early in the project.

If you are still selecting an appliance, Northern Cookstoves offers a range of wood cook stoves for heating and cooking from established manufacturers.

Changing Home Insurance Providers

An insurance company may want more information about a home that contains a wood-burning appliance. It may ask questions about the age of the stove, chimney construction, installation, frequency of use, firewood storage, previous inspections and professional maintenance.

Some insurers request a WETT inspection report before confirming or continuing coverage. The exact requirements vary, so homeowners should obtain written instructions from the insurer before scheduling the inspection.

Buying a Home or Cottage

A standard home inspection may provide only a limited visual assessment of a wood stove or fireplace. A buyer may therefore request a separate inspection by a WETT-certified professional.

This can be especially important when:

• The installation is older.
• The installation date is unknown.
• Manufacturer instructions are unavailable.
• The previous owner installed or modified the appliance.
• A chimney passes through concealed areas.
• There is visible corrosion or deterioration.
• The property has been vacant.
• The appliance is the primary source of heat.
• No previous inspection report is available.

A professional inspection can help a buyer understand the system before relying on it for heating or cooking.

Selling a Property

Sellers may choose to obtain an inspection before listing a home or cottage with a wood-burning appliance. Having current documentation available can help answer questions from buyers and their insurers.

An inspection may also identify concerns that can be corrected before the property reaches the market. This can reduce the risk of inspection-related delays during a real estate transaction.

Modifying an Existing Installation

Replacing a stove, changing the stovepipe, adding new wall protection, altering the hearth or making changes to the chimney can affect the installation as a whole.

Do not assume that a new stove can be connected to an old chimney without further evaluation. The appliance, connector pipe, chimney and surrounding construction must be compatible.

Investigating a Problem

An inspection may be appropriate if you notice:

• Smoke entering the room
• Persistent smoky odours
• Weak or inconsistent chimney draft
• Black staining near pipe joints
• Cracked firebricks
• Warped or damaged stove components
• Corrosion on the chimney or connector pipe
• Excessive creosote accumulation
• Loose chimney components
• Signs of overheating
• Previous chimney-fire damage
• Water leaking around or into the chimney

If there is an immediate concern about fire, smoke or carbon monoxide, stop using the appliance and contact the appropriate qualified professional. An inspection checklist is not a substitute for urgent safety assistance.

WETT Inspection Checklist: What to Do Before the Appointment

Preparing for the appointment helps the inspector access the system and collect the information required for the report. It can also prevent delays or the need for a return visit.

1. Confirm What Type of Inspection Is Required

Before booking the appointment, ask the organization requesting the report exactly what it needs.

If the request came from your insurance provider, ask:

• Does it require a WETT inspection report?
• Is a particular inspection level required?
• How recent must the report be?
• Are photographs required?
• Does the insurer have its own form?
• Does the report need to be completed by a professional with a particular WETT designation?
• Will the insurer require proof that identified concerns were corrected?

Forward these requirements to the inspector before the appointment. A basic visual inspection may not provide enough information if the insurer has asked for a more detailed technical assessment.

2. Verify the Inspector’s Qualifications

Use the official WETT professional directory to find or verify a certified professional.

Ask the inspector whether their designation permits them to perform the type of inspection being requested. WETT professionals can hold different qualifications, such as inspector, technician or chimney sweep designations. Not every professional offers every service.

You can also ask:

• How much experience do you have with wood cook stoves?
• Do you inspect both the appliance and chimney system?
• What will be included in the written report?
• Are photographs included?
• How long will the appointment take?
• What parts of the home will you need to access?
• What happens if an issue is found?
• Can you perform repairs, or will another professional be required?

Choosing someone familiar with cook stoves can be particularly helpful because these appliances combine cooking and heating functions and may have different construction and installation requirements than a conventional room heater.

3. Gather the Appliance Documentation

Collect any documents related to the stove and chimney, including:

• Stove owner’s manual
• Installation manual
• Manufacturer specifications
• Product certification information
• Model and serial numbers
• Original purchase receipt
• Installation invoice
• Building permit
• Municipal inspection records
• Previous WETT reports
• Chimney cleaning records
• Repair and maintenance invoices
• Information about replacement components
• Documentation for the chimney system
• Records of previous insurance approval

Manufacturer instructions are especially important because required clearances and installation details can vary between stove models.

If the manual is missing, record the manufacturer, model name, model number and serial number. The supplier or manufacturer may be able to provide a replacement copy.

Northern Cookstoves carries models from Suppertime Stoves, Margin Stoves and Kitchen Queen Stoves. Product-specific documentation can help an inspector evaluate the installation against the manufacturer’s requirements.

4. Make the Stove and Surrounding Area Accessible

The inspector needs a clear view of the appliance and nearby construction. Before the appointment:

• Remove decorative objects from the stove and hearth.
• Move firewood away from the immediate stove area.
• Remove freestanding fire screens that obstruct access.
• Clear furniture away from the appliance.
• Make wall and floor protection visible.
• Ensure appliance labels can be accessed if possible.
• Unlock doors or gates needed to reach the chimney exterior.
• Provide safe access to utility rooms, attics or crawl spaces when requested.

Do not make unverified changes simply to make the installation look compliant. The inspector needs to assess the system accurately.

5. Allow the Stove to Cool Completely

Unless the inspector gives different instructions, the appliance should not be operating when the appointment begins.

A hot stove can prevent the professional from safely examining the firebox, doors, gaskets, stovepipe and other components. Ask how long the stove should remain unused before the inspection. The necessary cooling period can depend on the appliance and how heavily it was fired.

Remove loose ashes only if it is safe and the inspector asks you to do so. Store ashes in a metal container with a tight-fitting lid on a non-combustible surface away from the home and other combustible materials. Ashes can retain live embers longer than expected.

6. Arrange Access to the Chimney

A wood-burning system includes more than the stove. The chimney is responsible for safely carrying combustion gases out of the building and creating the draft needed for proper operation.

Depending on the inspection, the professional may need to examine:

• The chimney connection
• Interior chimney sections
• Attic or crawl-space sections
• Wall or ceiling penetrations
• Exterior chimney sections
• Chimney supports and brackets
• The chimney cap
• Roof clearances
• Cleanout areas
• Masonry condition
• Connections to an existing chimney

Tell the inspector in advance about steep roofs, limited attic access, locked areas or other accessibility concerns. Weather conditions may also affect whether exterior or rooftop components can be safely viewed.

7. Prepare a History of the Installation

The inspector may ask about the stove’s history. Write down what you know, including:

• When the appliance was installed
• Who installed it
• Whether it was installed new or used
• Whether it has been moved
• Whether the stovepipe or chimney has been changed
• How often the stove is used
• What type of firewood is normally burned
• When the chimney was last cleaned
• Whether there has ever been a chimney fire
• Whether smoke has entered the home
• Whether nearby walls or floors become unusually hot
• Whether any component has been repaired
• Whether the home has been renovated around the stove

Do not worry if some information is unavailable. Be honest about what you know and what remains uncertain.

8. Test Your Smoke and Carbon Monoxide Alarms

A wood cook stove is a fuel-burning appliance, making smoke and carbon monoxide protection essential.

Ontario expanded carbon monoxide alarm requirements for existing homes beginning January 1, 2026. Depending on the home and applicable provisions, alarms may be required adjacent to sleeping areas and on every storey. Homeowners should review current Ontario carbon monoxide safety requirements and consult their local fire department if uncertain.

Before using a wood cook stove:

• Confirm smoke alarms are installed where required.
• Confirm carbon monoxide alarms are installed where required.
• Test alarms according to manufacturer instructions.
• Replace expired alarms.
• Replace batteries when needed.
• Make sure alarms can be heard from sleeping areas.
• Never disable an alarm because it activates repeatedly.

An alarm that sounds may be warning you about a serious problem. Investigate the cause rather than removing the battery.

What Does a WETT Inspector Look At?

The precise scope depends on the requested inspection and what portions of the system are accessible. However, several areas are commonly examined.

Appliance Identification and Condition

The inspector may record the stove manufacturer, model, serial number, certification label and installation instructions. The appliance may also be examined for visible deterioration or unauthorized modification.

Potential concerns can include:

• Cracked or missing firebricks
• Warped stove components
• Damaged doors
• Deteriorated gaskets
• Cracked glass
• Loose handles or hinges
• Corrosion
• Damaged baffles
• Missing components
• Alterations to the firebox
• Signs of overfiring

A stove can continue to produce heat even when it has a developing problem. That does not necessarily mean it is in suitable condition for continued operation.

Clearances from Combustible Materials

Heat can affect nearby combustible materials even when they are not touching the stove. The inspector may measure the distance between the appliance or stovepipe and nearby:

• Walls
• Trim
• Cabinets
• Shelving
• Furniture
• Ceiling materials
• Wood framing
• Doors
• Firewood
• Decorative items

Required clearances depend on the appliance certification, manufacturer instructions, connector pipe, wall-protection system and other installation details.

A brick or metal panel placed against a wall does not automatically create approved clearance reduction. Heat shields and wall protection must be designed and installed correctly to provide the intended protection.

Hearth and Floor Protection

The inspector may examine the non-combustible surface beneath and around the appliance.

The assessment can include:

• Hearth dimensions
• Ember protection
• Floor construction
• Extension in front of loading doors
• Protection beside and behind the stove
• Cracks or missing material
• Stability and support
• Appliance positioning

Cook stoves may have multiple doors or access points, making it important to consider where embers could fall during loading, cooking, cleaning or ash removal.

Stovepipe and Connections

The connector pipe carries exhaust from the stove to the chimney. The inspector may look at:

• Pipe diameter
• Pipe material
• Joint orientation
• Fasteners
• Support
• Clearance from combustibles
• Number and type of elbows
• Signs of corrosion
• Loose or damaged joints
• Creosote leakage
• Connection to the appliance
• Connection to the chimney
• Whether the pipe passes through prohibited areas

Improvised, damaged or incorrectly connected stovepipe can increase the risk of smoke leakage, poor draft and fire.

Chimney Condition and Configuration

The chimney may be assessed for:

• Appropriate construction
• Compatibility with the appliance
• Interior and exterior condition
• Height and termination
• Support and stability
• Clearance from the roof and nearby structures
• Signs of water entry
• Corrosion or cracking
• Damaged masonry
• Missing or damaged caps
• Creosote accumulation
• Proper connection
• Evidence of previous chimney fire
• Access for cleaning and maintenance

A safe-looking stove does not compensate for a damaged or unsuitable chimney. The appliance and venting system must function together.

Signs of Excessive Heat or Poor Performance

An inspector may observe evidence such as:

• Discoloured stovepipe
• Warped metal
• Charred wood
• Darkened walls or ceilings
• Cracked masonry
• Creosote staining
• Smoke marks
• Melted or damaged components
• Unusual deposits
• Deterioration around chimney penetrations

Tell the inspector if the stove is difficult to light, smokes when doors are opened or produces inconsistent heat. Operational history can provide context that is not visible during a cold inspection.

Understanding the Levels of WETT Inspection

WETT recognizes different levels of inspection because not every situation requires the same degree of investigation.

Visual Inspection

A visual inspection is a non-invasive assessment of the readily accessible portions of a wood-burning system. It may be appropriate when the system is uncomplicated, documentation is available and there is no indication of a significant problem.

The inspector does not open walls or dismantle major components during a basic visual assessment.

Technical Inspection

A technical inspection is more detailed. It may involve additional measurements, calculations, documentation review or access to areas beyond those covered during a basic visual inspection.

This type of inspection may be requested during a real estate transaction, after changes to the system or when the initial inspection identifies questions that require further evaluation.

Invasive Inspection

An invasive inspection may be recommended when there is evidence of a concealed problem that cannot be evaluated through visual or technical methods alone.

It can involve opening or removing building materials or system components to examine concealed areas. This level is less common and generally requires the owner’s authorization because it may involve disruption to the property.

The official WETT inspection levels provide more information. Always confirm the required scope with the inspector and the organization requesting the report.

What Happens After the Inspection?

Following the assessment, the inspector prepares a written report documenting the system and the findings. The report may include:

• Property information
• Appliance identification
• Chimney information
• Installation details
• Measurements
• Photographs
• Applicable reference information
• Areas that could not be accessed
• Observations about condition
• Items that do not meet applicable requirements
• Recommendations for further evaluation or corrective work

Read the entire report rather than looking only for a simple statement of acceptance. The purpose is to understand the condition of the system and any limitations of the inspection.

Keep the report with your home records, along with permits, manuals, cleaning receipts and repair invoices. You may need these documents for insurance, future inspections or a property sale.

What If the Inspector Identifies a Problem?

A problem on the report does not always mean the entire system must be replaced. Some concerns may be relatively straightforward to correct, while others require significant work.

Possible corrections can include:

• Moving combustible materials
• Expanding hearth protection
• Replacing damaged stovepipe
• Correcting pipe connections
• Repairing firebrick
• Replacing door gaskets
• Adding suitable shielding
• Repairing chimney components
• Removing an unapproved modification
• Improving chimney support
• Replacing an incompatible chimney
• Relocating the appliance

Do not perform safety-related changes based only on guesswork. Ask the inspector to explain the concern and what type of qualified professional should address it.

Depending on the issue, you may need a WETT-certified technician, chimney professional, mason, contractor or other specialist. Municipal permits may also be required.

Once the work is completed, retain invoices and photographs. Ask whether a follow-up inspection or updated report is necessary. If the original inspection was requested by an insurer, send documents only after confirming what the insurer wants to receive.

Does a WETT Inspection Include Chimney Cleaning?

An inspection and a chimney cleaning are different services.

An inspector assesses the visible system and documents its condition. A chimney sweep removes soot, creosote and other deposits from the chimney and related components. Some professionals hold qualifications to provide both services, but you should not assume cleaning is included with the inspection.

Ask when booking:

• Is chimney cleaning included?
• Should the chimney be cleaned before the inspection?
• Can you clean it if needed?
• Will heavy deposits prevent portions of the system from being assessed?
• Will I receive a separate cleaning record?

A clean chimney can make portions of the system easier to evaluate, but cleaning does not correct installation problems such as inadequate clearance, unsuitable components or damaged construction.

How Often Should a Wood Cook Stove Be Inspected?

There is no single schedule appropriate for every appliance and household. Inspection and maintenance frequency can depend on:

• How often the stove is used
• Whether it is the primary heat source
• The type and moisture content of firewood
• Chimney construction
• Previous creosote accumulation
• Appliance age
• Manufacturer recommendations
• Insurance requirements
• Changes to the system
• Evidence of performance problems

A household that operates a wood cook stove every day through a Canadian winter will place different demands on the system than a cottage owner who lights a few fires each year.

At a minimum, inspect the accessible appliance and venting components regularly, follow manufacturer maintenance instructions and arrange professional chimney service as appropriate. Never continue operating a system that has signs of damage, excessive deposits, smoke leakage or overheating.

For additional owner maintenance guidance, see Northern Cookstoves’ article on cleaning and maintaining a wood-burning cook stove.

Common WETT Inspection Questions

How Much Does a WETT Inspection Cost in Ontario?

The cost varies according to the inspection level, property location, system complexity, travel, accessibility and whether additional services are required.

Instead of choosing an inspector based only on the lowest price, ask what the fee includes. Confirm whether you will receive a complete written report, measurements and photographs and whether exterior or rooftop components are included when safely accessible.

How Long Does a WETT Inspection Take?

The appointment length depends on the type of inspection and the complexity of the system. A readily accessible appliance with complete documentation may take less time than an older installation with multiple chimney sections, missing labels or concealed components.

Ask the inspector for an estimate when scheduling and allow enough time to answer questions about the system.

Can a Home Inspector Perform a WETT Inspection?

A home inspector can perform a WETT inspection only if they also hold the appropriate current WETT certification for the requested service.

A general home inspection and a WETT inspection are not automatically the same. Verify the professional’s designation before relying on the resulting report for insurance or real estate purposes.

Can I Use My Stove Before the Inspection?

That depends on the circumstances. If the appliance is newly installed, has not yet received required approvals, or has a suspected defect, do not use it until the appropriate authority or qualified professional confirms that it can be operated.

If an inspector identifies an immediate safety concern, follow the directions in the report and stop using the appliance until the issue has been properly addressed.

Will a WETT Report Guarantee Insurance Coverage?

No inspection report can guarantee that an insurance company will offer or continue coverage. Insurance providers establish their own underwriting requirements.

A WETT inspection provides documented information that an insurer can use when evaluating the property. The insurer may accept the report, ask for additional details, require corrections or make a different coverage decision.

Does a WETT Inspection Replace a Building Permit?

No. A municipal building permit, municipal inspection and WETT inspection serve different purposes.

Contact your local building department before installing or altering a wood cook stove, chimney or related building components. Do not assume one form of inspection replaces another.

What Happens If My Stove Does Not Have a Certification Label?

A missing label does not automatically determine the final outcome, but it can make the system more difficult to evaluate. The inspector may need additional documentation and may have to assess the installation using requirements applicable to an uncertified appliance.

Provide any manuals, receipts, photographs or manufacturer information you have. Do not create or alter an appliance label.

A WETT Inspection Is One Part of Responsible Wood Cook Stove Ownership

A WETT inspection in Ontario can provide valuable information about the installation and visible condition of a wood cook stove, connector pipe and chimney. It can help homeowners identify concerns, satisfy certain insurance requests and make more informed decisions when buying or selling a property.

However, an inspection report is not a substitute for responsible daily operation. Safe wood cook stove ownership also includes burning properly seasoned firewood, following the manufacturer’s operating instructions, controlling the fire appropriately, removing ashes safely, maintaining smoke and carbon monoxide alarms, arranging chimney cleaning and responding quickly to signs of damage.

The best time to think about these requirements is before purchasing or installing a stove. Early planning makes it easier to select an appropriate model, choose a suitable location, understand clearance requirements and coordinate installation, permits and inspection.

Find the Right Wood Cook Stove for Your Ontario Home

Northern Cookstoves and Heaters supplies dependable wood cook stoves designed to provide cooking, home heating and greater energy independence. Our selection includes handcrafted models from Margin Stoves, Suppertime Stoves and Kitchen Queen, with options for family homes, farms, cottages and off-grid properties.

We can help you compare stove sizes, cooking capabilities, heating performance and installation considerations before you make your decision. Planning carefully from the beginning can make the purchase, installation and inspection process much more straightforward.

Explore our complete selection of wood-burning cook stoves, or contact Northern Cookstoves to discuss the right model for your home.

Call Northern Cookstoves and Heaters at 519-788-3788 or request a quote online to begin planning a safe, reliable wood cook stove installation.