Chimney Leak Repair in St. Catharines.
Water-entry diagnosis and repair — crown, cap, flashing, and masonry, found by hose test not guesswork. St. Catharines homes see hard freeze-thaw cycles every winter — that's the #1 accelerator of chimney damage in the GTA. An annual sweep and inspection is the single cheapest insurance you can buy for your home.
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A certified expert calls or texts back in under 15 minutes. No spam. Fixed-price written quote.
Leak Repair you can actually trust
A stain on the ceiling beside the chimney has five likely sources, and only a staged hose test tells you which. We isolate the entry point — crown crack, missing cap, failed counter-flashing, porous brick, or a bad mortar joint — repair it, then re-test under water before we call it fixed.
Every St. Catharines technician is WETT SITE-Basic certified at minimum, with two inspectors carrying full SITE-Comprehensive credentials.
What's included
Benefits
- ✓ Staged hose test to find the actual entry point
- ✓ Crown, cap, flashing, and masonry repairs in one visit
- ✓ Vapour-permeable waterproofing, never sealer paint
- ✓ Re-tested under water before sign-off
Our process
- 1. Interior stain mapping and attic inspection
- 2. Staged hose test from the base upward
- 3. Repair the confirmed entry point
- 4. Re-test, then apply breathable water repellent
We serve every St. Catharines neighbourhood
Leak Repair pricing & options
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WETT Certified
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CSIA Certified
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Professional
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Trusted
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Highly Recommended
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Reliable
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Expert
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Condo
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Real Estate
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Insurance
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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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Fall
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Leak Repair in St. Catharines — common questions
Why is my chimney leaking only in heavy rain?+
Wind-driven rain gets through porous brick and hairline crown cracks that shed ordinary rainfall fine. That pattern usually points to the crown or the masonry face, not the flashing.
How much does chimney leak repair cost?+
Most GTA leak repairs land between $349 and $1,600 — flashing resealing at the low end, crown replacement plus waterproofing at the high end.
Can I just seal the chimney with waterproofing paint?+
No. Film-forming sealers trap moisture inside the brick, and the next freeze pops the face off. Only vapour-permeable siloxane repellents are safe on masonry.
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Service · urgency · contact. A chimney expert replies in under 15 minutes.
- Fixed-price written quote
- No spam, no sales calls
- WETT & CSIA certified
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Leak Repair — nearby cities