Metal flashing

Metal Flashing Lower Mainland: Installation & Repair

Metal flashing Lower Mainland homeowners rely on to keep rain out of their walls. Tomron custom-bends and installs flashing at your windows, doors, rooflines and decks, following Canadian Wood Council best practices so water never gets a chance to reach your framing.

Why flashing matters

Flashing is what keeps your walls dry

Your siding sheds most of the rain, but water always finds the gaps: around windows, where a roof meets a wall, under a deck ledger. Metal flashing is the barrier at each of those weak points, redirecting water outward and away from your home.

The Lower Mainland gets months of sustained rain every year. When flashing is missing, installed poorly or worn out, water slips into the wall cavity and quietly causes rot, mould and insulation failure that can cost thousands to put right. Good flashing is a small part of the job that protects the biggest investment you own.

Warning signs

Signs your flashing may be failing

Flashing problems rarely announce themselves. These are the clues we see most often on Lower Mainland homes.

Water stains near windows and doors

Brown rings or streaks on interior walls, ceilings or sills are often the first visible sign of a leak.

Rust, gaps or lifted edges

Flashing that is corroded, bent, cracked or pulling away from the wall can no longer direct water where it should go.

Peeling or bubbling paint

Moisture trying to escape from inside the wall breaks down exterior coatings around frames and trim.

Musty odours along exterior walls

A damp smell in rooms on outside walls can point to hidden moisture in the wall cavity.

Dark streaks near rooflines

Staining where the roof meets a wall often means water is running where it shouldn’t.

Soft or spongy trim boards

Trim that gives under light pressure has likely been soaking up water for some time.

Recognize any of these? Book a free inspection. We’ll find the source, show you what we see, and tell you honestly whether it needs a repair or a full replacement. No cost, no obligation.

Where we install flashing

The places water gets in

Every opening and transition in your walls needs its own flashing detail. These are the spots we protect on every project.

Windows

Head, sill and jamb flashing that sheds water over and around the frame instead of into it.

Doors and thresholds

Sill pans and head flashing that keep water out at the lowest and most exposed point of the wall.

Roof-to-wall transitions

Step and kick-out flashing where a roof meets a wall, one of the most common causes of hidden leaks.

Decks and ledgers

Flashing behind and above deck attachments, where water can sit against the framing for years.

Vents, pipes and penetrations

Custom flashing around cladding penetrations like vents, hose bibs, light fixtures and meter bases.

Belly bands and wall bases

Drip caps and base flashing that let water drain off trim lines and away from the foundation.

Our approach

How we install metal flashing

Flashing is essential construction, not an afterthought. Here’s how a typical job runs.

Step 01

Inspect

We look at every window, door, roofline and penetration, and identify where water is getting in or is likely to.

Step 02

Plan the details

You get a written proposal that says what we’ll flash, with what, and what it will cost.

Step 03

Custom-bend on site

Each piece is bent to fit your exact frames, headers and transitions, so there are no generic gaps.

Step 04

Install and integrate

Flashing is tied into the weather-resistant barrier and siding so water is directed out, layer by layer.

What’s included

Everything a proper flashing job should cover

01 · Custom fit

Custom-bent flashing for a precise fit at every junction

02 · Every junction

Window, door, roof and wall-transition flashing

03 · Durable metals

Corrosion-resistant aluminum and galvanized steel

04 · Works with your envelope

Integration with siding and building envelope systems

05 · Repairs and replacements

Repair and replacement of failed or missing flashing

06 · Peace of mind

Protection against water intrusion, rot and mould

The metals we use

Aluminum

Lightweight, rust-proof and easy to shape, so it works well for windows, doors and trim details. It can be finished to suit your exterior.

Galvanized steel

A stronger, stiffer option for high-wear locations like roof-to-wall transitions and kick-outs, where extra durability matters.

Trusted brands

Flashing and metal products we use

Flashing is only as good as the metal it is made from. We source from Canadian fabricators who build for BC weather.

Tri-City Flashing (TCF)

Metal flashing and installation

Family-owned in Port Coquitlam since 1998, making the flashing that keeps water out.

Inter-Globe Building Supplies

Building supplies and custom metal

Our supplier for custom metal and flashing materials.

MAC Metal Architectural

Steel siding and metal

Made in Canada, with over 30 years of premium steel fabrication.

Why Tomron

A flashing contractor who sees the whole wall

We install what flashing protects

Because we also install siding, windows and building envelope systems, your flashing is designed to work with everything around it, not just patched on top.

You see the problem first

We show you what we find, explain the cause in plain language, and only recommend the work your home actually needs.

Clear proposal, no surprises

Every job starts with a written proposal and clear pricing, so you know what you’re getting before we start.

FAQ

Metal flashing questions, answered

Straight answers about flashing repair, replacement and cost. Have a different question? Ask us, it’s free.

How do I know if my flashing needs replacement?

Common signs include water stains on interior walls near windows or doors, rust or gaps in the exterior flashing, peeling paint around frames, and musty odours from hidden moisture. The only way to be sure is to have it inspected, and our inspections are free.

Can flashing be replaced without removing all the siding?

In many cases, yes. Depending on the location and extent of the problem, we can selectively remove and reinstall siding panels to reach and replace failed flashing without a full tear-off.

How much does metal flashing replacement cost?

It depends on how many openings and transitions need work, how accessible they are, and the metal used. A spot repair costs far less than a whole-house job. We give you a written proposal after a free inspection, so you know the price before we start.

How long does metal flashing last?

Properly installed aluminum or galvanized steel flashing can protect a wall for decades. Flashing fails early when it’s poorly detailed, damaged, or installed without regard to the layers around it, which is why installation matters as much as the metal.

Should I replace flashing when I replace my windows or siding?

Yes, whenever the exterior is already open it is the best and most cost-effective time to install new flashing. Skipping it can undo the value of new windows or siding by leaving the same weak points behind.

What’s the difference between flashing and caulking?

Caulking is a short-term seal that dries out and cracks. Flashing is a mechanical barrier that physically directs water away from the wall. Caulk can support flashing, but it shouldn’t replace it.

Your exterior works as a system

Next step

Get your flashing inspected for free

Don’t wait for a leak to find out. We’ll inspect your property, show you what we find, and give you a detailed proposal. No obligation.