Best Window Replacement Ajax: Top Companies Compared

The best window replacement in Ajax comes from TotalSeal, a factory-direct vinyl manufacturer and installer that recently completed a full triple-glazed window replacement in the town, followed by established Durham Region installers Clera Windows + Doors, Falcon Windows and Doors, Albern Windows and Doors, and Canadian Choice Windows & Doors. Each company fits ENERGY STAR™ certified vinyl windows built for wind off Lake Ontario, so warranty terms and installation quality matter as much as the brand name.

Comparison Table of Window Replacement Companies in Ajax

Here is the fast comparison if you want the shortlist before reading the detail below.

TotalSeal: Best Overall

TotalSeal tops this list because it manufactures its own vinyl windows in the GTA, has a proven local track record in Ajax, and backs every job with a lifetime warranty on both product and installation.

Quick Specs

• Type: casement, awning, slider, single and double hung, tilt and turn, bay, bow
• Frame material: vinyl, 5 to 7 chamber, fusion-welded corners
• Energy rating: ENERGY STAR™ certified, double or triple glazing
• Glass type: Low-E 272 or 366 coating, argon fill
• Warranty: lifetime on product and installation
• Price range (CAD): $260 to $950 per window, $2,500 to $6,000 for bay or bow

Pros

• Recently completed a full window replacement in Ajax with triple-glazed vinyl units
• Factory-direct manufacturing removes reseller mark-up
• Rated 5.0 on HomeStars and 4.8 on Google, plus BBB accreditation
• Dedicated local page for window replacement in Ajax
• Free in-home consultation with no obligation

Cons

• Based in the wider GTA rather than a Durham-only storefront
• Triple glazing carries a 20 to 30% premium over double glazing

Overview

TotalSeal’s most recent Ajax project involved a full window replacement using new vinyl triple-glazed units, chosen specifically for better insulation and noise reduction against wind off Lake Ontario. The company builds around 150 windows a day from its own GTA facility, and every frame uses a warm-edge hybrid spacer that cuts condensation by up to about 25% compared with aluminium spacers. The Total Seal Lock multi-point system comes standard across casement and slider styles, matching the tight seal that lakefront-facing homes in Ajax need most.

Clera Windows + Doors: Best for Fibreglass and a Local Durham Branch

Clera Windows + Doors has manufactured, installed, and serviced windows in Ontario for 47 years, and its local branch serves Ajax and the wider Durham Region directly, with a non-prorated, fully transferable lifetime warranty.

Quick Specs

• Type: casement, awning, slider, single and double hung, bay, bow, custom shapes
• Frame material: vinyl or fibreglass, 100% pure virgin uPVC
• Energy rating: ENERGY STAR™ certified
• Glass type: Low-E coatings, argon or krypton fill
• Warranty: lifetime, non-prorated, fully transferable

Pros

• Family-run since 1978, with a dedicated Ajax and Durham Region branch
• Fibreglass frame option alongside standard vinyl
• Factory-direct pricing removes reseller mark-up
• Non-prorated, fully transferable lifetime warranty
• Super Spacer technology aimed at insulation and noise reduction

Cons

• Some customer reports mention installation or service delays
• Fibreglass units carry a price premium over standard vinyl

Overview

Clera’s Durham Region branch means Ajax homeowners get a company with local staff rather than a crew dispatched from further away. Its fibreglass frame option is a genuine point of difference on this list, since fibreglass expands and contracts far less than vinyl across Ontario’s wide seasonal swings, useful on wind-exposed lots near the Ajax waterfront. The Super Spacer technology also targets noise reduction, a relevant feature for homes near busier roads or rail lines further from the shoreline.

Falcon Windows and Doors: Best HomeStars Award Record

Falcon Windows and Doors has more than 10 years of installations across Ajax, Durham, and the wider GTA, and has won HomeStars Best of Awards six times with a 98% Star Score.

Quick Specs

• Type: standard vinyl window and door replacement styles
• Frame material: vinyl
• Energy rating: ENERGY STAR™ certified
• Warranty: confirm directly, not published in detail

Pros

• Six-time HomeStars Best of Award winner with a 98% Star Score
• Strong, consistent independent review record
• Serves Ajax, Durham Region, and the wider GTA
• Straightforward quoting process for standard replacements

Cons

• Shorter overall company history than Clera, Albern, or Canadian Choice
• Warranty terms are not clearly published and should be confirmed before signing

Overview

Falcon’s HomeStars record is the standout reason to shortlist it. A 98% Star Score across multiple award cycles reflects a consistent pattern of satisfied customers rather than a handful of good reviews. The company’s core business is straightforward vinyl window and door replacement, without the broader manufacturing scale of Clera or Canadian Choice, so it tends to suit standard replacement jobs rather than heavily customised projects.

Albern Windows and Doors: Best Long-Established Durham Company

Albern Windows and Doors is a family-run business that has served Durham Region since 1955, making it the longest-established company on this list by a wide margin.

Quick Specs

• Type: premium windows and doors, standard replacement styles
• Frame material: vinyl
• Warranty: confirm directly, not published in detail
• Service area: Durham Region, including Ajax

Pros

• Family-run and based in Durham Region since 1955
• Deep familiarity with the area’s older housing stock and permit requirements
• Community-rooted reputation built over seven decades
• Personalised service from a smaller, local team

Cons

• Smaller scale than GTA-wide manufacturers, which can affect capacity during busy seasons
• Warranty terms are not clearly published and should be confirmed directly

Overview

Albern’s seven decades in Durham Region give it a level of local knowledge that a company serving Ajax occasionally cannot match, including familiarity with the town’s mix of older waterfront-adjacent streets and newer subdivisions. For homeowners who prefer working with a long-standing, physically local business over a larger regional manufacturer, Albern is the practical choice, though it is worth asking directly about warranty coverage since it is not published in detail online.

Canadian Choice Windows & Doors: Best High-Volume Track Record

Canadian Choice Windows & Doors has installed more than one million windows and doors for over 100,000 Canadian households over more than 30 years, backed by a 25-year transferable warranty.

Quick Specs

• Type: casement, awning, slider, single and double hung, bay, bow, triple-pane and impact-resistant options
• Frame material: vinyl, recyclable uPVC, DraftLOCK technology
• Energy rating: ENERGY STAR™ certified
• Warranty: 25-year transferable

Pros

• Over 30 years in business with more than one million installations
• Proprietary DraftLOCK technology for energy efficiency
• Numerous customisation options and colour choices
• In-house manufacturing in Canada
• 25-year transferable warranty

Cons

• Some customers report occasional scheduling delays
• A 25-year warranty is shorter than the lifetime coverage some competitors offer

Overview

Canadian Choice’s scale is its main selling point, with a customer base and installation volume larger than most other companies serving Ajax. The proprietary DraftLOCK technology is aimed squarely at energy efficiency, and the company’s triple-pane and impact-resistant glass options suit homeowners wanting the strongest available protection against Lake Ontario wind and driven rain. The 25-year transferable warranty is solid, though it is worth comparing directly against the lifetime coverage some competitors on this list offer.

Deeper Comparison: Ajax Window Replacement Companies by Key Spec

Key Factors to Consider Before Buying

1. Ask whether the company manufactures its own windows or resells another factory’s line, since factory-direct usually removes a mark-up.
2. Confirm current WSIB coverage, so you are not liable if someone is hurt on your property during installation.
3. Compare warranty length and exactly what it covers, product only, labour only, or both together.
4. Check whether the frame reaches a U-factor at or below 1.22 W/m²K, the ENERGY STAR™ certified minimum for Canada.
5. Ask specifically whether the company services your part of Ajax regularly, since some companies quietly treat Durham Region as an add-on trip.
6. Cross-check independent review scores on HomeStars, Google, and the BBB rather than relying on a company’s own testimonials.

Key Terminology

• U-factor: a measure of how much heat a window loses. Lower numbers mean better insulation.
• ENERGY STAR™ certified: a Canadian government label confirming a window meets a maximum U-factor of 1.22 W/m²K, tested to a national standard.
• Low-E coating: a thin metal coating on the glass that reflects heat back into the room in winter and out in summer.
• Argon fill: an inert, safe gas sealed between glass panes that slows heat transfer compared with plain air.
• Warm-edge spacer: the strip that separates glass panes at the edge, designed to reduce condensation compared with older aluminium spacers.
• Full-frame replacement: removing the entire old window, frame included, down to the rough opening.
• Insert replacement: fitting a new window into the existing, still-sound frame without removing it.
• Multi-point lock: a locking system with two or three points that pulls the sash tight against the frame for a better seal, used across bay and bow windows.

Final Verdict / Recommendation

For most Ajax homeowners, TotalSeal is the strongest overall pick, backed by a genuine local project history, factory-direct pricing, and a lifetime warranty on product and installation. Clera Windows + Doors suits homeowners who want a fibreglass frame option from a company with a dedicated Durham Region branch. Falcon Windows and Doors stands out on independent review record, while Albern Windows and Doors offers the deepest local roots of any company on this list. Canadian Choice Windows & Doors is worth shortlisting for its sheer installation volume and DraftLOCK technology. Compare warranty terms and installer credentials side by side before you book.

Frequently Asked Questions

Here are the questions Ajax homeowners ask most often when comparing window replacement companies.

How Much Does Window Replacement Cost in Ajax?

Per-unit prices typically run $260 to $950 depending on style, with bay or bow windows starting around $2,500. A full detached-house project usually falls between $9,000 and $18,000.

Which Ajax Window Company Has the Longest Local History?

Albern Windows and Doors has served Durham Region since 1955, making it the longest-established company on this list, though several others also have decades of Ontario-wide experience.

Do I Need a Permit to Replace Windows in Ajax?

Usually not, if you replace a window with one the same size in the same opening. The Town of Ajax requires a permit if you change the opening’s size or add a bay or bow window.

What Is the Best Window Material for a Home Near Lake Ontario?

Vinyl handles the wind, moisture, and temperature swings near the Ajax waterfront well, since it will not rot, rust, or need repainting. Fibreglass is a stronger, pricier alternative some companies also offer.

What Should I Check Before Choosing a Window Company in Ajax?

Check whether the company manufactures its own product, confirm WSIB insurance, compare warranty terms line by line, and cross-check independent review scores before booking a quote.