Chimney Flashing & Waterproofing In Toronto
The joint where your chimney meets the roof is where most chimney leaks begin. We trace the leak first, then replace the flashing properly — step flashing and counter flashing, no tar-over shortcuts.
- Leak traced — before anything is touched
- New step and counter flashing — no tar
- Breathable waterproofing — where it makes sense
- WETT-Certified
Technician - 2,000+Chimneys
Serviced - $0Inspection
At Your Home - Camera Photos
Included - Warranty On
Materials & Labour - Open 7 Days
7:00–22:00
You’ll know exactly what we found — and exactly what it costs — before we start.
Open 7 days, Saturdays and Sundays included, 7:00–22:00.
Signs Of A Chimney Leak
Water travels, so the stain is rarely right under the problem.
Stains Near The Chimney
On the ceiling or wall beside the chimney, often after heavy rain or snow melt.
Water In The Firebox
After storms — from the flashing, the crown or a missing cap.
A Damp Attic Around The Stack
Wet wood or insulation where the chimney passes through.
Tar Patches On The Roof
Someone has patched it before. Tar buys months, not years.
Peeling Paint By The Fireplace
Moisture behind the finish is coming from somewhere above.
Not sure which one you’re seeing? That is what the free inspection is for. Book it here or call (416) 505-6228.
Winter Special
$200 Chimney SweepFree 19-point inspection included
- The inspection is free either way — with or without a sweep
- Camera photos and the written report, yours to keep
- The exact price before any work starts
- Open 7 days, Saturdays and Sundays included, 7:00–22:00.
What Flashing Repair Includes
- Leak path traced from the attic and the roof
- Failed flashing and old tar removed
- New step flashing woven into the shingles
- Counter flashing set into the masonry
- Joints sealed; water-tested where access allows
- Breathable masonry waterproofing where it makes sense
How We Fix Chimney Flashing
Every visit starts with protecting your home and ends with photos and a clean work area.
Trace
The leak path found from the attic and the roof before anything is touched.
Strip
Failed flashing and old tar removed down to the roof deck and brick.
Re-flash
New step flashing woven into the shingles; counter flashing set into the masonry over it.
Seal & Test
Joints sealed; water-tested where access allows.
Real Work, Real Photos
From our own jobs — not stock photography.
Before
AfterA weathered crown and worn joints on a stone chimney
- Where
- Toronto & GTA
- The Problem
- A weathered crown and worn joints on a stone chimney.
- What We Did
- New crown, joints filled, and the chimney sealed where it meets the roof.
- The Result
- Water-shedding crown and a sealed roofline on the same chimney.
See more before-and-after photos and recent jobs.
See all our workWhat Every Visit Includes
WETT-Certified Technician
The certification insurers and home inspectors ask about.
Free Inspection At Your Home
A real look at the chimney, no charge, no obligation.
Camera Photos You Keep
You see what we see before any work.
Exact Price Before Work
Given at your home. Nothing starts without your OK.
Warranty On Every Job
Materials and labour, both covered.
Read what homeowners say about Northmark on our Google Business Profile.
See Our Google ReviewsWhat Will It Cost?
The inspection is free and the price comes before the work — not after. Materials and labour are covered by a warranty on every job.
The 19-Point Northmark Chimney Check
The same 19 points on every visit, in the same order, worked through by a WETT-certified technician — whether you booked a sweep or just want to know where you stand. You get the report and the photos, free.
Chimney
- 01Height & clearance
- 02Chimney cap / shroud
- 03Crown / chase cover
- 04Spark arrestor
- 05Brickwork, mortar & stucco
- 06Flue liner
- 07Moisture resistance
Fireplace
- 08Smoke chamber
- 09Damper
- 10Firebox
- 11Ash doors
- 12Fireback / reflector
- 13Firewall
- 14Gas logs
Roof
- 15Flashing
- 16Tiles / shingles
Woodstove
- 17Stove pipe condition
- 18Stove condition
- 19Installation / clearance
What It Costs, In Plain Numbers
Two prices we can publish, and one we can’t — because nobody can price a repair honestly without seeing the chimney first.
$0
19-Point Chimney Check
At your home. No obligation.
- A technician comes out and works through all 19 points
- Camera photos of what we find, yours to keep
- A written report and a plain-language explanation
- The price for any work, on the spot
$200
Chimney Sweep
Standard chimney, this winter.
- Flue, smoke chamber and firebox swept and vacuumed
- The 19-point check included, at no extra cost
- Floors and the fireplace area covered before we start
- Area vacuumed and left clean
Afterthe check
Repairs & Installs
Caps, crowns, liners, masonry, flashing.
- Priced at your home, after you have seen the photos
- Nothing starts until you say yes
- Warranty on materials and labour
- Same price evenings and weekends
Winter pricing for a standard chimney sweep, inspection included. Call and we will confirm it for your chimney before booking. Open 7 days, Saturdays and Sundays included, 7:00–22:00.
Questions About Flashing & Waterproofing
Anything else — call (416) 505-6228.
How do I know the leak is from the chimney?
Stains near the fireplace, water in the firebox after storms, or a damp attic around the stack are the usual signs. We trace the leak before touching anything.
Is tar an acceptable fix?
Tar buys months, not years, and it makes the proper repair harder later. We replace the flashing itself.
What is counter flashing?
The second layer, set into the masonry, that covers the step flashing. The two-layer system is what keeps water out.
Do you waterproof the brick too?
Yes — breathable masonry waterproofing where it makes sense, so the brick sheds water without trapping moisture.
What does flashing repair cost?
It depends on the roof, access and how far the water got, so no blind numbers online. The inspection is free and the price is set at your home before any work.
Often Booked Together
One visit, one crew. Most jobs combine two of these.
Chimney Caps
FixesRain, snow and animals getting into an open flue.
A cap sized to your flue, not one-size-fits-all.
Learn More
Masonry & Tuckpointing
FixesOpen mortar joints, flaking brick, a worn crown.
Repointed and matched to your brick.
Learn More
Chimney Repair
FixesCracked crowns, damaged fireboxes, water getting in.
Fixed once, with materials matched to your home.
Learn MoreStop The Leak
Tell us where the water shows up and when — we’ll trace it and show you what we find.
- No obligation
- Photos included
- Price before any work starts
Every Day 7:00–22:00. If we miss your call, we call right back.