Is your fireplace a cozy comfort or a hidden hazard?
Like a magician’s trick, your fireplace can appear warm and harmless on the outside while quietly concealing risks behind the scenes. And in Ontario’s long winters, it’s easy to forget that a beautiful flame can come with real danger if your wood-burning system isn’t up to code.
That’s where a WETT inspection comes in.
What Is a WETT Inspection?
A WETT (Wood Energy Technology Transfer) inspection is a detailed review of any wood-burning appliance (like a fireplace, wood stove, or chimney system) to ensure it meets safety codes and installation standards.
WETT-certified inspectors look for issues that could lead to: – Chimney fires – Carbon monoxide leaks – Structural damage from heat or improper installation
Homeowners often assume that because a fireplace works, it must be safe. But WETT inspections go beyond surface appearances—they uncover hidden safety risks you can’t see.
Why WETT Inspections Matter in Winter
Ontario winters demand a lot from your heating system. Fireplaces and stoves often run longer and hotter, and any installation issues, creosote buildup, or venting problems can quickly become serious hazards.
Here’s why winter is the critical season for a WETT inspection:
- Creosote Buildup Is Worse in Winter: More frequent fires mean more creosote—a flammable substance that builds up in your chimney and increases fire risk.
- Carbon Monoxide Risks Spike: A blocked or poorly installed chimney can lead to dangerous gases entering your living space.
- Insurance May Require It: Many insurers won’t cover wood-burning appliances unless they’ve been inspected by a WETT-certified professional.

3 Signs You Should Book a WETT Inspection
- You’re buying or selling a home with a wood-burning appliance.
- You’ve never had a formal inspection of your fireplace or stove.
- You see smoke backing up, odd smells, or excessive soot.
Even if your system seems fine, these signs should prompt a closer look.
What a WETT Inspector Looks For
During the inspection, your ISG-certified inspector will review: – Chimney and flue liner condition – Clearances from combustible materials – Installation and code compliance – Signs of moisture damage or wear – Proper ventilation and draft
You’ll get a report outlining any issues and recommendations—plus peace of mind.
How Often Should You Get a WETT Inspection?
At least once a year, if you use your wood-burning system regularly. It’s also wise to schedule one after renovations or any time a new appliance is installed.
Stay Warm, Stay Safe
A crackling fire is one of winter’s best comforts—but only when it’s safe. A WETT inspection ensures your fireplace isn’t hiding a costly or dangerous surprise.
Curious about what’s behind your fireplace? A WETT inspection might reveal more than you expect.
Learn more about WETT inspections or book yours today.


