Roof Flashing Repair in St. Catharines.
Replace and reseal step, counter, chimney, and skylight flashing — the #1 source of roof leaks. 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.
Flashing Repair you can actually trust
80% of roof leaks aren't shingle problems, they're flashing problems. We replace step flashing at walls, counter flashing at chimneys, valley flashing, skylight flashing, and plumbing boots. New aluminum or lead, mechanically fastened, sealed with tri-polymer sealant.
We carry $5M in liability insurance and WSIB coverage — verifiable before we set foot on your St. Catharines property.
What's included
Benefits
- ✓ Aluminum or lead — never galvanized-only
- ✓ Mechanical fastening, not caulk-and-pray
- ✓ Tri-polymer sealant, 20-year rated
- ✓ Covers 80% of common leak sources
Our process
- 1. Identify failed flashing type and location
- 2. Remove shingle courses to expose flashing
- 3. Install new step / counter / valley / boot flashing
- 4. Re-shingle over new flashing, seal edges
We serve every St. Catharines neighbourhood
Flashing Repair pricing & options
Cost
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Near Me
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Best
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2026
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Winter 2026
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Top Rated
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Certified
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Licensed
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Fully Insured
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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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Reputable
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Reliable
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Expert
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Master
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Family Owned
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Local
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Recommended
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Affordable
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Cheap
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Low Cost
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Budget
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Premium
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Luxury
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Residential
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Commercial
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Condo
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High-Rise
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Landlord
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Property Management
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Real Estate
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Pre-Listing
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Pre-Purchase
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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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Fast
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Quick
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Next Day
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Weekend
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Evening
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Fall
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Winter
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Spring
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Annual
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5-Star
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No Obligation
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Free Quote
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Fixed Price
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Upfront Pricing
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24/7
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Book Online
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Written Quote
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Flashing Repair in St. Catharines — common questions
What is step flashing?+
Small L-shaped metal pieces woven into each shingle course where the roof meets a wall. When they fail, water enters at every course — usually where the ceiling stain shows up years later.
Other services in St. Catharines
Book Flashing Repair in St. Catharines
Free written quotes. Same-week booking across the GTA.
Quote in 3 quick taps.
Service · urgency · contact. A chimney expert replies in under 15 minutes.
- Fixed-price written quote
- No spam, no sales calls
- WETT & CSIA certified