WETT Inspection Ottawa: Everything You Need to Know Before Buying a Home with a Fireplace
If you're buying a home in Ottawa or Eastern Ontario that has a wood-burning fireplace, wood stove, or wood insert — congratulations. There's nothing like a real fire on a cold Ottawa winter night. But before you strike your first match, there's something you need to know: your insurer and lender almost certainly require a WETT inspection, and skipping it could leave you uninsured, unfinanced, or facing a very expensive problem.
This guide from Property Inspection Network explains everything you need to know about WETT inspections in Ottawa — what they are, what they cover, what they cost, and what happens if the inspection finds problems.
What Is a WETT Inspection?
WETT Certification Explained
WETT stands for Wood Energy Technology Transfer — a national training, education, and certification program for wood-burning appliance professionals in Canada. WETT Inc. is the non-profit organization that administers the program, and a WETT-certified inspector is trained and licensed to assess wood-burning systems to the applicable installation and safety standards.
A WETT inspection is a professional evaluation of wood-burning equipment — fireplaces, wood stoves, pellet stoves, fireplace inserts, and related chimney systems — to determine whether they are installed correctly, operating safely, and compliant with applicable codes.
Who Can Perform a WETT Inspection?
Only individuals certified by WETT Inc. are qualified to perform WETT inspections and issue WETT inspection reports. There are several levels of WETT certification, with Site Evaluation and Basic Sweep being the most common for real estate purposes.
At Property Inspection Network, our WETT-certified inspectors have extensive experience with the full range of wood-burning systems found in Ottawa-area homes — from original masonry fireplaces in older Westboro and Glebe homes to modern certified wood stoves in newer builds.
Why Is a WETT Inspection Required in Ottawa?
Insurers Require It
This is the most common trigger. When you apply for homeowner's insurance on a property with a wood-burning appliance, your insurer will almost universally require a WETT inspection report before they will bind coverage. Without a valid WETT report, you may be unable to get insurance — which means you may be unable to close on the purchase.
Even if you already have insurance, if a claim involves a fire that started in or near a wood-burning appliance that was never WETT inspected, your insurer may deny the claim.
What Insurers Are Looking For in a WETT Report
Confirmation the appliance is a certified product (or was installed to code at time of installation)
Clearances to combustibles are correct (proper distance from walls, floors, ceilings)
The chimney or flue is appropriate for the appliance
No visible evidence of deterioration, damage, or hazardous conditions
Mortgage Lenders May Require It
Many mortgage lenders and financial institutions also require a WETT inspection report as a condition of financing — particularly in recent years as insurers have tightened their requirements. If you're financing your purchase (and most buyers are), confirm with your lender early whether a WETT report is required.
It's Required for Your Own Safety
Beyond insurance and financing, a WETT inspection is simply good sense. Improperly installed or deteriorated wood-burning appliances are a leading cause of residential fires in Canada. An inspection that identifies a clearance issue, a deteriorated flue liner, or a chimney blockage could literally save your life.
What Does a WETT Inspection Cover?
A standard WETT site evaluation includes a visual inspection of the wood-burning system and chimney. Here's what our inspectors assess.
The Wood-Burning Appliance Itself
Certification and Identification
Is the appliance a certified product (CSA or ULC label)?
If it's a masonry fireplace, was it built to applicable code standards?
What are the appliance's specifications (make, model, fuel type, BTU rating)?
Clearances to Combustibles
This is the most critical safety check. Every certified wood-burning appliance has required minimum clearances — distances from the appliance to combustible materials like walls, floors, and ceilings. A WETT inspector verifies:
Side clearances (distance from appliance to adjacent walls)
Rear clearances
Floor protection (the non-combustible pad or floor protector beneath the appliance)
Ceiling clearances
Insufficient clearances are one of the most common defects found in Ottawa-area inspections — particularly in older homes where appliances were installed before current standards, or where renovations have inadvertently reduced clearances.
Physical Condition of the Appliance
Condition of firebox, grates, doors, gaskets, and seals
Catalytic combustor condition (if applicable)
Baffle condition
Signs of warping, cracking, or damage
The Chimney System
Chimney Type and Configuration
Is the chimney masonry or a factory-built (Class A) metal chimney?
Is the chimney type appropriate for the connected appliance?
Does the chimney height meet code requirements (must extend a minimum height above roofline and within certain horizontal distances of roof peaks)?
Chimney Condition
Visible condition of masonry (mortar, bricks, crown, cap)
Flue liner — visible condition (masonry liner may require camera inspection for full assessment; note: standard WETT does not include camera inspection — this is a separate add-on)
Flashing and counter-flashing condition and weathertightness
Chimney cap — present and functional?
Evidence of water intrusion, staining, efflorescence, or spalling
Clearances at Chimney Penetrations
Does the chimney maintain required clearances where it passes through floors, ceilings, walls, and the roof?
Is the firestop (attic insulation shield) present and correct at ceiling/attic penetrations?
The Connection Between Appliance and Chimney
Connector Pipe (Stovepipe)
For wood stoves and inserts, a connector pipe runs from the appliance to the chimney. The inspector evaluates:
Connector pipe material and gauge (must be the correct type for the appliance)
Joints and connections — secured and sealed correctly
Clearances to combustibles along the full run of connector pipe
Total length and configuration (horizontal run length and rise requirements)
Common WETT Inspection Findings in Ottawa Homes
Based on our experience inspecting hundreds of Ottawa-area properties, here are the most frequently identified issues.
Insufficient Clearances
As noted above, clearances are the most common defect. Many older appliances — especially wood stoves installed in the 1970s and 1980s — were installed before current standards were in place, or by homeowners without professional guidance. Insufficient clearances can often be corrected by adding a listed heat shield or non-combustible shield material.
Missing or Damaged Chimney Cap
A chimney cap keeps rain, snow, debris, and animals out of the flue. Ottawa's climate makes a functioning chimney cap especially critical — a flue that allows water infiltration will deteriorate significantly faster in our freeze-thaw cycle. Missing caps are common and inexpensive to correct.
Deteriorated or Cracked Flue Liner
This is one of the more serious findings. A damaged flue liner can allow combustion gases, sparks, and heat to escape into the building structure — a fire and carbon monoxide hazard. In older Ottawa homes with original clay tile liners, liner deterioration is common and often requires professional relining.
Non-Certified or Non-Compliant Appliance
Some older wood stoves and inserts simply don't have CSA/ULC certification and cannot be brought into compliance. In these cases, replacement may be required before an insurer will cover the appliance.
Clearance Issues at Chimney Penetrations
Where factory-built chimneys pass through ceilings and attic spaces, specific firestops and clearances are required. Missing or incorrect firestops are a relatively common finding, particularly in older or DIY-installed systems.
What Happens If the WETT Inspection Finds Problems?
Not All Findings Are Deal-Breakers
Finding a deficiency in a WETT inspection doesn't automatically mean the deal falls apart. Many issues are straightforward and inexpensive to correct — a chimney cap replacement, a new gasket, or a properly installed heat shield. Your inspector will clearly identify what is required.
Serious Findings May Require Repair Before Closing
If the issue is significant (deteriorated flue liner, serious clearance violation), you'll want to negotiate with the seller to have it corrected before closing, or get contractor quotes and negotiate a price adjustment. A non-operational wood-burning appliance is a significant reduction in the home's value and utility.
The Appliance Can Be Decommissioned
If the seller is unwilling to repair the appliance and the insurer won't cover it as-is, the appliance can sometimes be permanently decommissioned (sealed and rendered inoperable) to satisfy the insurer. This is obviously less desirable but is a path forward if needed.
How Much Does a WETT Inspection Cost in Ottawa?
A WETT inspection in Ottawa typically costs $150 – $250 when added to a standard home inspection. When booked as a standalone service, costs may be higher.
For context on the full cost of a home inspection with add-ons, read our complete Ottawa Home Inspection Cost Guide.
WETT Inspections for Sellers: The Pre-Listing Advantage
If you're selling a home with a wood-burning appliance, having a WETT inspection done before you list can:
Remove a common buyer objection — buyers who see a current WETT report feel more confident
Speed up your sale — no waiting for buyer-ordered WETT inspections during the offer period
Allow you to address deficiencies in advance and price accordingly
Property Inspection Network offers pre-listing inspections that can include a WETT evaluation as part of a comprehensive pre-sale package. Contact us to book.
WETT Inspections and Your Home Insurance
How to Use Your WETT Report with Insurers
When you receive your WETT inspection report, provide it directly to your insurance broker or insurer. The report documents the appliance type, installation details, and the inspector's findings. Insurers use this to assess the risk and determine whether they'll provide coverage — and on what terms.
What If My Appliance Wasn't WETT Inspected When I Bought?
If you've been in your home for some time and your wood-burning appliance was never WETT inspected, it's not too late. You can book a WETT inspection at any time — not just during real estate transactions. We recommend all homeowners with wood-burning appliances have them assessed, particularly before the heating season begins each fall.
Book your WETT inspection with Property Inspection Network — available year-round.
WETT Inspections and New Home Warranties
If you're buying a newly constructed home or recently renovated home in Ontario, a wood-burning appliance may be covered under the Tarion new home warranty. However, warranty coverage doesn't replace the need for a WETT inspection — warranty compliance and WETT compliance are separate matters.
Learn more about new home warranty compliance reviews from Property Inspection Network.
Frequently Asked Questions About WETT Inspections in Ottawa
-
There is no provincial law requiring a WETT inspection before a real estate transaction. However, most insurers require one before they'll provide coverage on a home with a wood-burning appliance — making it effectively mandatory for most buyers.
-
There is no fixed regulatory interval. However, WETT Inc. recommends that wood-burning systems be professionally inspected at least every few years, or whenever the system is used heavily, modified, or after any incident (chimney fire, unusual smell/smoke, etc.).
-
No. A WETT inspection must be performed by a WETT-certified inspector. Not all home inspectors hold WETT certification — verify this when booking. Our inspectors at Property Inspection Network hold the required WETT certification.
-
A WETT inspection is an assessment of the installation and safety of the wood-burning system. A chimney cleaning (sweep) removes creosote buildup and debris from the flue. They are complementary services — many homeowners do both annually — but a cleaning is not a substitute for an inspection.
-
Yes. Pellet stoves and pellet inserts are covered under WETT's scope. If your home has a pellet-burning appliance, the same inspection requirements apply as for wood-burning systems.
Book Your Ottawa WETT Inspection Today
Don't let a wood-burning appliance become a stumbling block in your real estate transaction — or a hidden hazard in your home. Property Inspection Network's WETT-certified inspectors are available across Ottawa and Eastern Ontario, with 24/7 online booking.
👉 Book a WETT inspection online — available 24/7
👉 Visit our WETT Inspection service page
👉 See home inspection pricing in Ottawa
Related Services
WETT Inspection Ottawa — Our dedicated WETT inspection service page
Pre-Listing Home Inspection Ottawa — Bundle a WETT inspection with your pre-listing package
Mold Inspection Ottawa — Often recommended alongside WETT for comprehensive pre-purchase due diligence
Air Quality Testing Ottawa — Test for mold spores, VOCs, and more