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# How to Prepare a Fireplace for Winter in Canada: Complete Guide 2026
- URL: https://www.thecanadareport.ca/prepare-fireplace-winter-canada/
- Published: 2025-10-01T14:47:29.000Z
- Updated: 2026-08-29T22:10:20.000Z
- Description: Ensure your fireplace is winter-ready in Canada! This guide covers essential cleaning, safety checks, and efficiency tips for a cozy season.
- Author: Steve Cogbill
- Tags: Canadian Guides

Heads up: some of the links in this post are affiliate links. That means if you click and purchase, we may get a commission. It’s how we keep this site running without cluttering it with ads. 

***Last updated on August 29, 2026***

Book the inspection first. Certified chimney sweeps and gas technicians across Canada fill their calendars through September and October, and by the first real cold snap you are waiting weeks. Everything else on this list you can do yourself in an afternoon.

Two things changed for the 2026–27 season that are worth knowing before you start. Ontario's carbon monoxide alarm rules expanded on January 1, 2026, and most Canadian home insurers now want a current WETT report before they will cover a wood-burning appliance at all. Both are covered below, along with the full prep routine for wood-burning and gas fireplaces.

![A warm, inviting living room with a lit fireplace, ready for the Canadian winter, showcasing comfort and safety.](https://storage.ghost.io/c/65/8b/658bb4e9-9316-49de-aa33-8d03ee59bdfd/content/images/2025/10/canadian-winter-fireplace-prep.png)

A cozy living room scene with a fireplace glowing, snow visible outside a window.

## What Changed for the 2026–27 Season

Two Canadian requirements are worth checking before you light anything.

### Ontario's CO alarm rules expanded January 1, 2026

Under Ontario Regulation 87/25, which amended the Ontario Fire Code to harmonize with the 2020 National Fire Code of Canada, homes with a fuel-burning appliance, a fireplace, or an attached garage now need a carbon monoxide alarm:

- Adjacent to every sleeping area, as before
- **On every storey of the home**, including floors with no bedrooms — this is the new part

That applies to detached and semi-detached homes, townhouses and cottages. If you own a place in the Kawarthas or Muskoka that sat empty most of last winter, it is covered too. Alarms must meet CSA 6.19, and the sensors expire — most units are done at five to seven years from the manufacture date printed on the back.

Other provinces have their own requirements, and several are moving toward the same national standard. Check your provincial fire code if you are outside Ontario.

### Your insurer probably wants a WETT report

Wood Energy Technology Transfer (WETT Inc.) is a national non-profit that certifies inspectors of wood-burning systems. There is no law requiring a WETT inspection, but most Canadian insurers require a current report before they will issue or renew a policy on a home with a wood-burning fireplace, stove or insert. A WETT inspector checks your installation against CSA B365, the Canadian code for solid-fuel appliances, and against the manufacturer's manual.

Most insurers want a fresh report every five to ten years, or whenever you sell the home, replace the appliance, change the chimney, or switch providers. Gas fireplaces are exempt from WETT, though they may need a separate inspection by a licensed gas fitter. If you are unsure, ask your insurer in writing what they need — the answer varies a lot between companies.

## Inspecting a Wood-Burning Fireplace

Start with the firebox. Look for cracks in the firebrick or mortar — small ones can be patched with [refractory cement](https://amzn.to/42PUjuI?ref=thecanadareport.ca), larger damage needs a professional. Then check the damper. It should open and close smoothly and seal tightly when shut.

A damper that no longer seals is one of the quieter ways heat leaks out of a Canadian home, and it belongs in the same category as drafty doors and single-pane windows — all of which we cover in our guide to [budget-friendly ways Canadians stay warm through winter](https://www.thecanadareport.ca/stay-warm-canadian-winter-on-a-budget/).

Next, the chimney cap and flashing. The cap keeps rain, snow and animals out of the flue. The flashing seals the chimney where it meets the roof, and a failure there puts water inside your walls. Look for rust, cracks or separation. On a Prairie or Atlantic roof in October this is a job worth handing to a roofer or sweep rather than doing yourself.

Finally, check the hearth and the area around it. Loose tiles or stones should be re-secured, and the hearth itself should be clear of anything combustible.

## How to Clean a Wood Fireplace and Chimney

Creosote is a highly flammable residue that condenses on the inside of the flue as wood smoke cools. It is the leading cause of chimney fires, and it builds up faster in the BC Interior and the Prairies, where softwood is what most people have on hand.

### What you'll need

- A [sturdy wire brush](https://amzn.to/42iv3Nz?ref=thecanadareport.ca) sized to your flue, plus extendable rods
- A [heavy-duty vacuum](https://amzn.to/4nvq84x?ref=thecanadareport.ca), a shovel, a bucket and a drop cloth
- [Gloves](https://amzn.to/42lNEIC?ref=thecanadareport.ca) and a [dust mask](https://amzn.to/4o1BHAg?ref=thecanadareport.ca)

### The steps

1. **Protect the room.** Lay drop cloths well past the fireplace opening, cover nearby furniture, and close the room off to contain dust.
2. **Clear the firebox.** Shovel out all ash and debris, then vacuum the fine ash. Scrub soot off the firebox walls and grate.
3. **Brush the flue.** Working top-down from the roof gives you gravity and less mess indoors, but only if you are genuinely safe up there. Bottom-up, pushing the brush into the flue from inside the firebox, is easier and messier. Either way, add rod sections as you go and work the brush up and down to dislodge the creosote.
4. **Clean up.** Vacuum everything that fell into the firebox, then clean the damper and smoke shelf.

If you burn most nights, or you cannot remember the last cleaning, hire a certified sweep instead. They will spot structural problems you would walk past, and in most of the country they can issue the WETT report your insurer wants at the same visit.

## How to Prepare a Gas Fireplace

Gas units skip the creosote problem but still need attention. Gas work is provincially regulated — the TSSA in Ontario, Technical Safety BC out west — so anything beyond basic cleaning belongs to a licensed gas fitter.

- **Read the manual first.** Model-specific requirements vary more than people expect.
- **Inspect the gas line and connections.** Look for kinks, damage and corrosion. Brush a mix of dish soap and water onto the connections — bubbles mean a leak. If you suspect one, shut off the gas supply, leave, and call your utility or a certified technician. Do not attempt the repair yourself.
- **Clean the burner and pilot area.** A soft brush or a vacuum hose attachment is enough. Be careful around the logs and ceramic embers, which are fragile.
- **Check the logs and embers.** Cracks, chips or discolouration mean they are no longer distributing heat properly. [Replace them if necessary](https://amzn.to/473dHH9?ref=thecanadareport.ca), and put them back in the exact positions the manual specifies.
- **Clear the vent cap.** On direct-vent and B-vent units the exterior cap must be free of nests, leaves and snow. This is the one to re-check through winter, not just in the fall — a drifted vent in Winnipeg or Quebec City after a heavy storm can push carbon monoxide back into the house.
- **Test it.** The flame should be mostly blue with yellow tips. Predominantly yellow or orange suggests a gas-to-air mixture problem that needs a technician. Listen for unusual noises.
- **Check your CO alarm.** Make sure your [carbon monoxide detector](https://amzn.to/4gOuscp?ref=thecanadareport.ca) works and has fresh batteries. Non-negotiable with any gas appliance.

An annual inspection by a certified gas technician is still worth booking. They can check internal components you cannot reach.

## Fireplace Safety Essentials

- **Install and test detectors.** Smoke alarms and CO alarms on every storey and near every sleeping area. Place [CO detectors](https://amzn.to/4nzKN7q?ref=thecanadareport.ca) according to the manufacturer's instructions, test monthly, and replace the whole unit when the sensor expires.
- **Keep a clear metre.** No rugs, furniture, curtains, newspapers or anything flammable within about one metre of the fireplace opening.
- **Use a screen or glass doors.** A [sturdy fire screen](https://amzn.to/42gquTZ?ref=thecanadareport.ca) stops sparks escaping a wood firebox. On a gas unit, a screen prevents accidental contact with glass that gets hot enough to burn.
- **Dispose of ashes properly.** Never into a plastic bag or cardboard box. Ashes that feel cold can hide embers that reignite days later. Scoop them into a [metal container with a tight-fitting lid](https://amzn.to/4842Rlf?ref=thecanadareport.ca), move it outdoors away from the house and anything combustible, and leave it at least 72 hours.
- **Supervise children and pets.** A [hearth gate](https://amzn.to/4pFVbvM?ref=thecanadareport.ca) is worth it with toddlers in the house.
- **Keep an extinguisher handy.** A working [fire extinguisher](https://amzn.to/3IPk47F?ref=thecanadareport.ca) rated for Class A and Class C fires, and everyone in the house should know where it is and how to use it.

## Getting More Heat Out of Your Fireplace

### Choose the right wood

**Seasoned only.** Wood that has been cut, split and dried for six to twelve months, longer for hardwoods, with a moisture content below 20%. Seasoned wood burns hotter and cleaner and produces far less creosote. Green wood smoulders, smokes and wastes energy.

**Hardwood where you can get it.** Maple, birch and oak burn longer and hotter per cord than pine or spruce. That is straightforward in Ontario, Quebec and the Maritimes. In much of BC and the Prairies, softwood is what is available and affordable — it burns fine, it just means shorter burns, more frequent reloading, and a chimney that needs cleaning more often.

**Never burn treated, painted or composite wood.** It releases toxic fumes and damages your chimney.

### Build and manage the fire properly

- **Try a top-down build.** Largest logs on the bottom, progressively smaller pieces above, kindling and a [fire starter](https://amzn.to/4mIW3gE?ref=thecanadareport.ca) on top. It burns cleaner, smokes less and needs less tending than the traditional bottom-up method.
- **Control the airflow.** Once established, adjust the damper and vents. Too much air burns fast and wastes fuel; too little creates a smouldering, smoky fire that coats your flue. Aim for a lively flame, not a roaring one and not a sleepy glow.
- **Seal the damper when you're done.** An open or leaky damper is an open window. A [top-sealing damper](https://amzn.to/4mN4Kqe?ref=thecanadareport.ca) seals far better than a traditional throat damper.
- **Move the heat around.** A [heat-powered stove fan](https://amzn.to/4mOeXTl?ref=thecanadareport.ca) pushes warm air into the room instead of letting it climb to the ceiling, and runs silently without electricity.
- **Consider a liner.** An older unlined masonry chimney drafts poorly and loses heat. A stainless steel liner fixes both, but it is a job for a certified professional.

![Perfectly seasoned firewood stacked for optimal burning efficiency, with a moisture meter showing low moisture content.](https://storage.ghost.io/c/65/8b/658bb4e9-9316-49de-aa33-8d03ee59bdfd/content/images/2025/10/seasoned-firewood-efficiency.png)

Close-up of seasoned firewood stacked neatly, with a moisture meter visible.

## Your Winter Fireplace Checklist

### All fireplaces, wood and gas

- Book the professional inspection — a WETT-certified sweep for wood, a licensed gas technician for gas. Call in September.
- Test every smoke and CO alarm. Replace batteries. Confirm you have CO coverage on every storey and near every sleeping area.
- Clear combustibles within about one metre of the opening, and make sure the hearth is stable.
- Check that the damper or vent cap moves freely and seals when closed. Clear exterior vents of nests, leaves and snow.

### Wood-burning fireplaces

- Inspect the firebox for cracked firebrick or mortar, and check the grate.
- Clear the firebox and brush the flue to remove creosote.
- Confirm the chimney cap is secure and the flashing shows no rust, cracks or separation.
- Stack enough seasoned wood for the season somewhere dry and [off the ground](https://amzn.to/42mtWwp?ref=thecanadareport.ca), away from the house. Bring in a day or two at a time so you are not importing pests.
- Have a lidded metal ash bucket, a [shovel, poker and tongs](https://amzn.to/472xOVT?ref=thecanadareport.ca), and a sturdy screen ready.

### Gas fireplaces

- Check the gas line for damage and soap-test the connections.
- Clean the burner and pilot area gently.
- Inspect the logs and embers for damage; replace and reposition as needed.
- Test ignition and watch the flame colour. Listen for unusual noises.

## How to Prevent a Chimney Fire

Creosote forms when smoke cools inside the flue and unburnt particles condense on the walls. It ranges from a flaky black deposit to a hardened tar-like glaze, and all of it burns.

- **Clean on a real schedule.** Burning daily usually means annual cleaning. Occasional use might stretch to every two or three years, but inspect annually regardless.
- **Burn dry wood.** Use a [moisture meter](https://amzn.to/46R2p7K?ref=thecanadareport.ca) and look for a reading under 20%. This does more to prevent creosote than anything else on this list.
- **Do not damper down.** Choking the fire to make it last produces a slow, smoky burn and coats the flue. Keep the damper open enough for the fire to establish and burn cleanly.
- **Fit a chimney cap.** It keeps rain and snow out of the flue, which matters more than people think — moisture inside a flue helps creosote stick and accelerates deterioration.

### If a chimney fire starts

You will usually hear it first: a loud roaring like a freight train, along with dense smoke or flames from the top of the chimney and intense heat off the chimney walls.

1. Close the damper and any glass doors to cut off the air supply.
2. Call 911 immediately.
3. If it is safe, use an extinguisher on flames that have escaped the firebox.
4. Get everyone out of the house.

Even if it appears to go out on its own, do not use the fireplace again until a professional has inspected it. A chimney fire frequently damages the flue in ways you cannot see.

---

## Frequently Asked Questions

**Q: How often should I have my wood-burning chimney inspected and cleaned in Canada?**  
A: For most Canadian homeowners with wood-burning fireplaces, an annual inspection by a certified chimney sweep is highly recommended. If you use your fireplace frequently (daily or almost daily), or if you burn a lot of softwood, you might need a cleaning more often, potentially even twice a year. An annual check ensures any creosote buildup is removed and that your chimney is structurally sound.

**Q: Can I burn anything other than seasoned wood in my fireplace?**  
A: No, you should only burn dry, seasoned wood in your fireplace. Never burn garbage, plastics, treated lumber, painted wood, cardboard, or anything that produces excessive smoke or toxic fumes. These materials can create dangerous creosote buildup, release harmful chemicals into your home and environment, and damage your chimney.

**Q: What are the signs that my gas fireplace needs professional servicing?**  
A: Several signs indicate your gas fireplace might need professional attention. These include a pilot light that frequently goes out, unusual smells (like gas or burning plastic), a flame that is mostly yellow or orange instead of blue with yellow tips, strange noises during operation, or difficulty igniting the unit. If you notice any of these issues, contact a certified gas technician immediately.

**Q: How can I tell if my firewood is seasoned enough for burning?**  
A: Seasoned wood will typically have cracks on the ends (called "checking"), feel lighter than unseasoned wood of the same size, and make a hollow sound when two pieces are knocked together. It should also have a moisture content of 20% or less, which you can check with a moisture meter. Freshly cut wood, or "green" wood, will be heavier, have no cracks, and often have a strong, sappy smell.

## Final Thoughts

The short version, if you only do five things this fall:

- **Book the inspection in September** — a WETT-certified sweep for wood, a licensed gas technician for gas. Your insurer likely wants the report anyway.
- **Sort out your CO alarms** — every storey and every sleeping area, and check the manufacture date while you are up there.
- **Clean the flue** before the first fire, not after you notice the smell.
- **Buy a moisture meter** and stop burning anything above 20%.
- **Clear the metre** around the hearth and set up a lidded metal ash can outdoors.

Do those in early fall and the rest of the season takes care of itself.

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