Aluminum Siding, Soffit, Fascia & Eavestrough Contractor in Toronto & the GTA

• 10+ years of siding and exterior aluminum work across Toronto and the GTA
• 5-year workmanship warranty, in writing, on every job
• Licensed, liability insured and covered by WSIB (workers’ compensation)
• Written contract before any work starts; free estimates by phone or online
• Service-area business: our crews come to your home anywhere in the GTA

What Pro Aluminum Siding does for GTA homeowners

We handle the outside skin of your house: the walls, the roofline and the trim that keeps water out of the framing. Most homes we visit need two or three of these services at once, because the same weather that fades siding also rots fascia boards and splits window trim.

Here is the full list of what we do, with a page on each that explains the work in detail:

• Aluminum siding installation and replacement, including tear-off of old vinyl, aluminum, wood shingle and composite siding.
• Soffit and fascia that ventilates the attic and protects the roof edge.
• Seamless eavestrough installation and repair, with downspouts sized to move water away from the foundation.
• Aluminum capping for exterior wood trim, our hub for all trim wrapping work.
• Window capping replacement for sills and brickmould that have gone soft or lost their paint.
• Window and door frame rot repair, done before capping so nothing is sealed over a problem.
• Garage door frame capping, measured, cut and bent on site to fit the opening.
• Porch and dormer installation, repair and cladding.

We are not roofers or general renovators, so if we spot a problem outside our scope, we will tell you plainly.

Why aluminum makes sense for a Toronto-area winter

Aluminum suits GTA homes because it does not absorb water, does not rot and does not become brittle in the cold, which is exactly what our winters test. The damage to exteriors here rarely comes from one big storm; it comes from water getting into a joint, freezing, expanding and thawing again, dozens of times a season.

The City of Toronto’s climate report puts real numbers on that cycle. At the Toronto City station, the 1971–2000 baseline averaged about 65.5 freeze–thaw cycles and roughly 134 frost days (days below 0°C) per year. Every one of those cycles works on paint films, caulking and any wood that has taken on moisture.

What the climate data means for your exterior

• Freeze–thaw is the main enemy of wood trim. Painted wood sills and fascia boards crack, take on water and then split from the inside. Aluminum capping sheds that water instead of holding it.
• Heavy rain is getting heavier. The same report notes that storms in 2013 and 2024 each dropped more than 100 mm of rain in about three hours, and it projects the maximum one-day rainfall to increase over the coming decades. Undersized or clogged eavestroughs overflow straight onto fascia and foundations in those events.
• Ice is a real load. The December 2013 ice storm brought freezing rain for more than 40 hours. Eavestrough hangers, fascia boards and soffit panels all carry that weight.
• Winters are warming, but not getting easier. December warmed by about 1.4°C between the 1961–1990 and 1991–2020 periods. The report expects fewer freeze–thaw cycles in future, possibly squeezed into a shorter winter, along with more winter rain falling on frozen ground. That is a recipe for ice damming and overflow at the roof edge.

The GTA housing stock is older than many people think

Much of Toronto’s housing was built when wood trim and painted fascia were the norm. According to the City’s 2021 Census housing backgrounder, about 29% of Toronto households live in dwellings built in 1960 or earlier, and another 29% in dwellings built between 1961 and 1980. In the rest of the Greater Toronto and Hamilton Area the share built before 1981 is lower, at 34%, but many of those homes are now well past the point where original trim and eaves were meant to last.

Homes from those decades often still have original wood window frames and fascia, and first-generation siding. That is the work we see most.

How aluminum compares with other common siding materials

Vinyl is cheaper and a reasonable choice for some homes. Aluminum earns its premium where you want metal’s fire resistance, a crisp, paintable finish, and trim that is bent to fit your house rather than forced into factory pieces. Brands such as Kaycan and Gentek are widely available in Canada, and we can talk through colour and gauge options during your estimate.

11 signs your home’s exterior needs attention

The clearest signs are soft wood, water where it should not be, and gaps where animals or air can get in. Walk around your house on a dry day with a screwdriver and a flashlight and look for these.

1. Wood trim that feels soft when you press it

Push a screwdriver tip into the bottom corner of a sill or jamb. If it sinks in, the wood is rotting. That is the point where frame rot repair comes before any capping, because wrapping soft wood in aluminum only hides the problem.

2. Peeling or blistering paint on trim that you painted recently

Paint that lifts within a year or two usually means moisture is coming from behind it. Repainting again treats the symptom. Capping the trim in aluminum ends the repaint cycle, once any wet wood has been dealt with.

3. Water spilling over the eavestrough during rain

Overflow means the trough is clogged, sagging, pitched wrong or simply too small for the roof area feeding it. Stand outside in a heavy shower and watch. Water sheeting over the front edge is soaking your fascia and landing beside your foundation.

4. Eavestrough pulling away from the house

A gap between the trough and the fascia board usually means the hangers have loosened or the fascia behind them has rotted. Either way, the next ice load can bring a section down.

5. Stains, streaks or moss on the siding below the roofline

Dark streaks under a roof corner mean water is running down the wall, often from leaking seams in older sectional eavestrough.

6. Sagging, cracked or missing soffit panels

Soffit is the underside of your roof overhang. Damaged panels let birds, squirrels and wasps into the attic and can upset attic ventilation. Look up at the overhang from each corner of the house.

7. Ice dams and icicles that form along the same stretch every winter

Repeated ice at one spot often points to poor attic ventilation, blocked soffit vents or a trough that cannot drain. Vented aluminum soffit is one part of the fix; insulation and air sealing inside the attic may be another, and we will say so if that is what we see.

8. Siding that is faded, chalky, dented or loose

Rub your hand on old aluminum siding. Heavy white chalk means the finish is breaking down. Rattling panels on windy days, buckled vinyl, or dents from hail and balls are all reasons to consider siding replacement rather than patching.

9. Gaps or cracked caulking around windows and doors

The joint between trim and siding or brick should be continuous. Cracks there let wind-driven rain in behind the trim, which is how sound wood turns soft over a few seasons.

10. Old capping that is bent, lifting or rusted at the fasteners

Window capping installed decades ago was not always bent to fit tightly. If edges are lifting or water stains run from under them, replacing the capping lets us inspect the wood and seal the opening properly.

11. A porch or dormer that looks tired, or feels unsteady

Peeling dormer cheeks, a sagging porch roof or spongy porch boards are bigger jobs. Cosmetic cladding is straightforward; anything structural needs proper assessment and may need a permit. Our porch and dormer page explains the difference.

How to choose an exterior aluminum contractor in the GTA

Choose a contractor who puts the scope, price, warranty and insurance in writing before work starts, and who explains what happens if they find rot. Exterior work is easy to quote vaguely and hard to judge once it is finished, because the most important parts are hidden under the aluminum.

What our credentials mean for you, in practical terms

• 10+ years in the trade. Bending clean, tight capping on site is a skill learned on hundreds of openings. Experience shows in the corners, the drip edges and the way water is directed off each piece.
• A 5-year workmanship warranty. If something we installed fails because of how we installed it, such as capping lifting or a trough seam leaking, we come back and fix it. Material warranties come from manufacturers and are separate; ask any contractor which is which.
• WSIB coverage. Exterior work means ladders and roof edges. Workplace Safety and Insurance Board coverage means our workers are covered for workplace injuries through the provincial system, which protects you from being drawn into a claim if someone is hurt on your property.
• Liability insurance. If a ladder goes through a window or a piece of equipment damages your car, liability insurance is what pays. Ask for proof from anyone you hire.
• A written contract. Scope, materials, colour, price, payment schedule and warranty terms are written down and signed. If the plan changes on site, for example because rot is found, the change is priced and agreed before the extra work is done.

Questions to ask every contractor you are considering

• Is the price fixed for the written scope, and how are extras such as rot repair priced?
• Will old material be torn off, or installed over? What happens to the debris?
• Is eavestrough seamless and formed on site, or sectional?
• What gauge and finish of aluminum will be used, and can I see colour samples?
• Can you show proof of WSIB coverage and liability insurance?
• What does the workmanship warranty cover, for how long, and is it in the contract?
• Who will actually be doing the work, and who do I call during the job?
• Does any part of this job need a building permit, and who is responsible for getting it?
• How will you protect gardens, windows and driveways while you work?

What does exterior aluminum work cost in Toronto and the GTA?

Most homeowners spend in the range shown below per unit of work, but your written quote after an on-site measure is what counts. These are typical GTA ballpark ranges for 2026, meant to help you budget and to sanity-check quotes, not to replace one.

What moves the price up or down

1. Height and storeys. A two-and-a-half-storey semi with a third-floor dormer needs more staging and time than a bungalow.
2. Access. Narrow side yards between houses, which are common in older Toronto neighbourhoods, slow everything down.
3. Tear-off. Removing and disposing of old siding or eavestrough adds labour and bin costs.
4. Rot found. Nobody can see inside a sill. Good contracts say how hidden rot will be priced.
5. Colour and gauge. Heavier gauges and some colours cost more.
6. Custom bends. Ornate brickmould, arched windows and multi-step profiles take longer to cap.
7. Season. Spring and fall are busy; booking early helps with scheduling.

Repair or replace? A quick comparison

Our process, step by step

Every job follows the same sequence, from the first call to the final walk-around.

1. Request a free estimate. Call (647) 560-9038 or use the free estimate form. Tell us what you have noticed and, if you can, send a few photos. That helps us bring the right samples.
2. On-site measure and inspection. We measure every wall, opening and run of roofline, and probe trim for rot. We also look at how water leaves the roof, where it lands, and whether soffit is venting the attic.
3. Written quote and options. You get a written quote that lists each item: siding area, soffit and fascia lengths, trough sizes, number of openings to cap. Where there is a choice, such as 5″ or 6″ eavestrough, or repair versus replacement, we explain both.
4. Choose colours and sign the contract. You pick colours from samples against your brick or siding. The contract spells out scope, price, payment schedule and the 5-year workmanship warranty.
5. Schedule and prepare. We book a start date and tell you what to move: patio furniture, planters, vehicles near the work area. If any part of the job needs a permit, that is sorted out before we begin.
6. Tear-off and repair. Old material comes off where the scope calls for it. Soft wood is cut out and replaced with sound, treated material. If we find more rot than expected, we stop, show you, and price it before continuing.
7. Install. Siding goes on over proper underlayment, aluminum is bent on site to fit each opening, and seams are lapped so water runs off, not in. Seamless eavestrough is formed to length and pitched to the downspouts.
8. Clean-up and walk-around. We remove debris, sweep for nails and walk the house with you. Anything you are not happy with goes on a list and gets fixed before we call the job done.

When is the best time of year for exterior work in Ontario?

Late spring through fall is the easiest window for most exterior aluminum work, but much of it can be done year-round in the GTA. Aluminum itself is not bothered by cold. What limits winter work is caulking and sealants, which need suitable temperatures to cure, plus snow, ice and short days.

A simple seasonal maintenance calendar

• Spring: look for fallen trough sections, bent downspouts and new soft spots on trim after the thaw.
• Early summer: wash siding and capping with a soft brush and mild soap; check caulking around windows.
• Fall: clean eavestroughs after the leaves are down; make sure downspouts discharge well away from the foundation.
• Winter: watch where icicles and ice dams form; note the spots and mention them at your next estimate.

Areas we serve across Toronto and the GTA

Our crews travel to homes throughout the city and the surrounding regions. Each area page covers the local housing styles, weather exposure and common exterior problems we see there. Start with the full service area overview, or go straight to your city.

City of Toronto

Our Toronto page covers the older city core, where brick semis, narrow lots and original wood trim are common. Separate pages look at the post-war bungalows of Scarborough, the mix of mid-century homes and newer rebuilds in North York, the bungalows and ranch-style houses of Etobicoke, and the compact brick homes of East York.

Peel and Halton

West of the city we work throughout Mississauga, from older lakeside neighbourhoods to large subdivisions, and in Brampton, where many homes from the 1970s onward now need their first major exterior update. Further along the lake, our Oakville page covers larger homes with plenty of trim detail.

York and Durham

North of the city we serve Vaughan, Markham and Richmond Hill, where many two-storey homes built in the past few decades have reached the age where eavestrough and soffit wear out. To the east, our Pickering page covers homes exposed to wind off Lake Ontario.

Not sure if your street is covered? Call (647) 560-9038 and ask.

Template: a quote-comparison worksheet

The fairest way to compare exterior quotes is line by line, using the same scope for each contractor. Copy this worksheet, fill in one column per quote, and the differences become obvious quickly.

Example project scenario: a full exterior refresh

If your home looks something like this, the easiest first step is a free estimate. Call (647) 560-9038 or book online, and you can read more about how we work before we visit.