4.9 · 512+ Reviews WETT & CSIA $5M Insured Same-Week
Toronto Chimney ProsWinter MMXXVI
Restored Toronto masonry fireplace at dusk with the CN Tower skyline
Newmarket · From $299

Roof Flashing Repair in Newmarket.

Replace and reseal step, counter, chimney, and skylight flashing — the #1 source of roof leaks. Because Newmarket 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.

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WETT certified · $5M insured · 5-year warranty

Why Newmarket chooses us

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 Newmarket property.

Scope

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. 1. Identify failed flashing type and location
  2. 2. Remove shingle courses to expose flashing
  3. 3. Install new step / counter / valley / boot flashing
  4. 4. Re-shingle over new flashing, seal edges
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We serve every Newmarket neighbourhood

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The complete Newmarket guide

Roof Flashing Repair in Newmarket: everything before you book

Why roof flashing repair works differently in Newmarket

Newmarket sits in a freeze-thaw belt, and freeze-thaw is what quietly takes apart masonry, flashing and venting.

Salt spray and road grit carried by winter wind accelerate corrosion on exterior metal components far faster in York than the manufacturer's rating assumes.

Wind loading off Lake Ontario pushes driving rain against the south and west faces of a house, which is why water entry so often shows up on one side of a Newmarket home and nowhere else.

Across Stonehaven-Wyndham, Summerhill Estates, Bristol-London, Woodland Hill and Huron Heights-Leslie Valley, the housing stock changes street by street, and the correct method changes with it. A century home with a soft-brick stack does not get the same treatment as a 2010 build with a factory-built vent — using one method on both is how systems get damaged.

the practical takeaway is that a roof flashing repair visit should start with an assessment, not a tool. Any crew that begins work before telling you what they found is guessing on your behalf.

Early signals worth acting on in Newmarket

Most Newmarket service calls start with one of a short list of symptoms. None of them are emergencies on their own; all of them are the visible end of a chain that started somewhere you cannot see.

Photograph anything you notice, with the date. A short series of images over two seasons tells a technician more than any verbal description can.

  • Birds, squirrels or wasps audible inside the stack
  • Cold downdraft even when the damper is closed
  • Water stains on the ceiling near the chase
  • A whistling or humming noise on windy nights
  • Debris, grit or shale flakes collecting in the firebox
  • A visible gap where flashing meets the wall
  • Soot marks fanning above the firebox opening
  • White chalky staining (efflorescence) on exterior brick
  • Rooms that stay noticeably colder when the appliance runs

Not sure which service you need? Compare Chimney Relining in Newmarket, Dryer Vent Cleaning in Newmarket, Downspout Install in Newmarket — or start with the full Newmarket service hub.

The sequence we follow on every Newmarket job

There is no improvisation in a roof flashing repair visit. The order below is fixed, and it is the order that makes findings defensible rather than anecdotal.

Nothing in the list below is optional or upsold. If a step cannot be completed — access is unsafe, or a component is missing — that becomes a written finding rather than a silent omission.

  • Arrival window confirmed by text, with the technician's name and photo
  • Photo hand-off: before and after images sent to you the same day
  • Written findings with priority ranking: safety-now, this-season, monitor
  • Baseline readings taken before work starts, so the improvement is measurable
  • Interior protection — drop sheets, HEPA vacuum staged before any tool is opened
  • Verbal walkthrough with you before the technician leaves the property
  • Full visual assessment and photo documentation of the starting condition
  • The service itself, performed to CSIA / WETT method

roof flashing repair pricing in Newmarket, explained honestly

Roof Flashing Repair in Newmarket starts at $299 for a standard, accessible system in serviceable condition. That figure is a starting point, not a quote: the honest answer is that several variables move the final price, and any company that quotes a firm number before seeing the system is either padding it or planning to revise it on site.

We give written quotes before work begins, and any repair discovered during the visit is presented as a separate priced option — never added to the invoice without your approval.

We would rather lose a job on price than win it by leaving the scope vague and revising it later.

FactorHow it affects your price
Weather windowExterior work that must cure above 5°C is scheduled, not squeezed in
DocumentationInsurance or real-estate reports require a deeper written scope than routine service
FindingsRepairs discovered during service are quoted separately and never auto-charged
UnitsMultiple flues or appliances on one visit share travel but not labour
Run lengthLonger or multi-elbow runs add labour and specialty tooling
SeasonPeak October–December booking carries less schedule flexibility than spring

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Best time of year to book in Newmarket

In Newmarket the booking calendar behaves predictably: everything is available until the first cold night, and then nothing is. Homeowners who book off-season get their choice of date; everyone else takes what is left.

SeasonWhat to expect
Spring (Mar–May)Best availability and pricing. Ideal for repairs — mortar cures properly above 5°C.
Summer (Jun–Aug)Quietest window. Best time for rebuilds, liner work and any project needing multiple days.
Early fall (Sep–Oct)Peak demand begins. Book 2–3 weeks ahead to secure a date before first fire.
Winter (Nov–Feb)Emergency and diagnostic work only for most exterior repairs; interior service continues.

Avoidable errors we are called in to correct

The complaints we hear about other contractors in Newmarket are remarkably consistent. Almost all of them trace back to one of the items below, and almost all of them are avoidable with two questions: "will I get photos?" and "is the finding written down?"

  • Using a hardware-store brush kit on a system that has never been scoped
  • Painting or sealing masonry with a non-breathable coating that traps moisture inside
  • Ignoring a report's 'monitor' items until they graduate to 'safety-now'
  • Sealing the symptom (caulk over a crack) instead of correcting the water path
  • Approving a rebuild quote without seeing the interior scope footage that justifies it
  • Skipping the inspection because the appliance 'seems fine'
  • Choosing a cap or liner by price rather than by appliance and fuel type

Where the scope starts and stops

Scope arguments happen when the boundary was never stated. So here is the boundary for roof flashing repair in Newmarket, in writing, before you book.

  • Full method service performed to manufacturer and code standard
  • Workmanship warranty in writing
  • Exterior termination and cap check as part of the same visit
  • Answers to your questions on site, in plain language, without a sales script
  • HEPA containment and complete clean-up of the work area
  • Written condition report with prioritised recommendations
  • Not included: Permits, where the municipality requires one
  • Not included: Appliance servicing that falls under a licensed gas fitter's scope
  • Not included: Parts on obsolete or discontinued appliances that must be special-ordered
  • Not included: Third-party roof or scaffold access on unusually steep or unsafe roofs

From the field in Newmarket

One Newmarket property had been serviced annually for years by a company that never scoped the flue. The paperwork was perfect and the system had been failing the whole time. The fix was straightforward — the missing piece was evidence, not skill.

We include cases like this because the pattern repeats. The expensive outcomes in Newmarket are almost never caused by a difficult repair — they are caused by a correct repair applied to the wrong diagnosis.

Codes, standards and certification we work to

Work in York is governed by provincial code and national standards, and insurers increasingly ask for proof that both were followed. Documentation is not paperwork for its own sake — it is what turns a denied claim into a paid one.

  • CSA B365 for solid-fuel burning appliances
  • Ontario Building Code and the O. Reg. 332/12 requirements governing venting and clearances
  • Manufacturer installation instructions, which the code treats as binding
  • Local municipal permit thresholds, which differ across the region
  • CSA B149.1 where a gas appliance shares the venting system
  • NFPA 211 levels of inspection as the reference for scope and reporting

The sensible split between DIY and certified work

There is real DIY territory here: clearing an accessible exterior vent hood, keeping the roofline clear of debris, watching for staining after heavy rain, and photographing anything that changes. That work is genuinely useful and costs nothing.

The hazard is confidence without measurement. Airflow, draft and liner integrity are all numbers, and none of them can be estimated by eye — which is why a clean-looking system can still be unsafe.

Do the outside work you can reach safely, keep dated photos, and buy one certified inspection a year. That combination catches almost everything worth catching.

After the technician leaves

Everything from the visit is documented and sent to you: images, findings, and a plain-language ranking of what needs attention now versus what can wait a season. Quotes are fixed and time-limited, not open-ended.

Where the honest answer is "stop using the appliance until this is corrected," we say it — and we would rather say it than sell you something adjacent to the problem.

We run the same method in neighbouring markets — Roof Flashing Repair in Cambridge, Roof Flashing Repair in Brantford, Roof Flashing Repair in Scugog.

FAQ

Flashing Repair in Newmarket — 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.

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