Fireplace Insert Installation in St. Catharines.
Wood, gas, and pellet insert installs that turn a heat-losing open fireplace into a real heater. Because St. Catharines building stock spans everything from century brick to 2020s builds, we bring the tools and materials for every era of chimney construction — no return trips, no surprises.
Your quote — in 3 quick taps.
A certified expert calls or texts back in under 15 minutes. No spam. Fixed-price written quote.
Insert Install you can actually trust
An open masonry fireplace is roughly 10% efficient — most of your heat goes up the flue. A properly installed insert with a full-length stainless liner runs 70–80% efficient and pays back on gas or wood spend within a few seasons. We size, install, line, and commission the appliance.
We carry $5M in liability insurance and WSIB coverage — verifiable before we set foot on your St. Catharines property.
What's included
Benefits
- ✓ 70–80% efficiency versus ~10% for an open hearth
- ✓ Full-length insulated stainless liner, never a stub
- ✓ Wood, gas, and pellet inserts installed
- ✓ WETT or TSSA documentation depending on fuel
Our process
- 1. Measure firebox, flue, and hearth for correct sizing
- 2. Prepare the opening and install the insulated liner
- 3. Set the insert, seal the block-off plate, trim to finish
- 4. Commission, test draft or combustion, issue certificate
We serve every St. Catharines neighbourhood
Insert Install pricing & options
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Winter 2026
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Certified
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WETT Certified
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Professional
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Trusted
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Master
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Family Owned
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Local
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Heritage
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Century Home
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New Build
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Detached Home
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Semi-Detached
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Townhouse
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Bungalow
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Two-Storey
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Three-Storey
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Cottage
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Wood-Burning
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Wood Stove
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Gas Fireplace
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Gas Insert
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Pellet Stove
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Oil Furnace
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Coal
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Masonry Fireplace
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Prefab Fireplace
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Leaking Chimney
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Cracked Chimney
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Smoking Fireplace
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Downdraft
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Blocked
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Old Chimney
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Damaged
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Storm Damage
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Wildlife Removal
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Creosote
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Soot
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Insert Install in St. Catharines — common questions
Does an insert need a new liner?+
Yes. Every manufacturer and CSA B365 require a continuous, correctly sized liner from the insert to the top of the chimney. A stub connector is a failed install.
How much does a fireplace insert install cost in the GTA?+
Installation runs $1,290–$3,200 excluding the appliance. Liner length, chimney condition, and offsets are the main cost drivers.
Which is cheaper to run, gas or wood insert?+
At current Ontario rates a wood insert is cheaper per BTU if you buy seasoned cordwood; a gas insert costs more per hour but needs no loading, ash removal, or annual sweeping.
Other services in St. Catharines
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- WETT & CSIA certified
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Insert Install — nearby cities