Top 3 Window Replacement Companies in Winnipeg (2026) — Reviewed

Winnipeg's climate puts windows through more stress than almost anywhere else in Canada. Temperatures swing from -40°C in January to +35°C in August, frames expand and contract through freeze-thaw cycles, and older homes in River Heights, Wolseley, Transcona, and the North End still have single-pane or deteriorating double-pane windows leaking hundreds of dollars in heat each winter. Getting the replacement right, with proper triple-pane glazing, argon gas fills, low-E coatings, and quality installation, is one of the highest-return home investments a Winnipeg homeowner can make.

These are our top three picks for window replacement companies in Winnipeg for 2026, based on local reputation, product quality, and what past customers actually say about the finished job.

Quick Comparison: Top 3 Window Companies in Winnipeg

1. Korsun Windows — Winnipeg's Window Replacement Specialist

Specialty: Window replacement  |  Location: Winnipeg, MB
Service focus: Residential window replacement across Winnipeg and surrounding areas

View Korsun Windows Winnipeg Replacement Services →

Korsun Windows is a Winnipeg-based window replacement company with a single clear focus: replacing residential windows properly in Manitoba's extreme climate. Unlike generalist renovation companies that offer windows as one item on a long service menu, Korsun concentrates specifically on window replacement, which shows in the depth of their product knowledge and the consistency of their installation results.

Their replacement windows are specified for Winnipeg's climate zone, meaning triple-pane glazing with low-E coatings and argon gas fills is the standard, not an upgrade. Homes in St. Vital, Fort Garry, Charleswood, and Transcona with original 1960s or 1970s windows are well-suited candidates for the kind of whole-home replacement Korsun handles routinely. The company handles measurement, ordering, and installation as a single coordinated process rather than subcontracting out the installation to a third crew.

For Winnipeg homeowners whose primary goal is replacing old, drafty windows with properly specified, professionally installed replacements, Korsun is the most focused option on this list.

Best for: Winnipeg homeowners replacing windows in older homes who want a local specialist focused entirely on window replacement, not a generalist juggling multiple trade categories.

2. Nisby — Windows and Renovation Work in Winnipeg

Specialty: Window replacement and full-scope renovation  |  Location: Winnipeg, MB

View Nisby Window Replacement Services →

Nisby is a Winnipeg renovation company offering window replacement alongside a broader range of home improvement services. For homeowners whose window project connects to other renovation work, such as updating trim, replacing a front door at the same time, or reframing an opening to change a window's size, Nisby is worth getting a quote from. Their ability to coordinate window replacement within a larger renovation scope reduces the hassle of managing multiple contractors.

Their window replacement work covers the standard Winnipeg residential range: casement, slider, hung, and fixed windows, with options suited to both newer builds in Waverley West and Bridgwater and older bungalows in Garden City, East Kildonan, and St. James. For clients who want one company to handle multiple scope items rather than scheduling separate specialists, Nisby offers a practical solution.

Best for: Homeowners whose window replacement is part of a larger renovation project and who want one company handling multiple scope items.

3. Ecoline Windows Winnipeg — Energy-Efficient Windows with Strong Warranty

Google: 4.7 ★ (1,007 reviews)  |  Founded: 2001 (national company)
Warranty: 25 years on parts and hardware, 5 years on installation labour

Visit Ecoline Windows Winnipeg →

Ecoline Windows has been operating across Canada since 2001 and has built one of the strongest review profiles of any window company serving Winnipeg, with 1,007 Google reviews at a 4.7-star average. All of their windows are Energy Star rated and NAFS-11 tested, the Canadian standard that certifies windows against wind, water, and structural load requirements for specific climate zones. For Winnipeg homeowners focused on energy performance and long-term warranty protection, Ecoline is the most credentialed option on this list.

Their product range includes triple-pane slider windows, custom-shaped windows, casement, awning, bay and bow, and basement windows. The 25-year warranty on parts and hardware is one of the strongest in the industry and covers the glass seal, which is typically the first thing to fail on cheaper windows after five to ten years in Winnipeg's temperature extremes. They offer free site visits and consultations, which is useful for homeowners trying to determine the right product specification before committing to a quote.

At a higher price point than local specialists, Ecoline is best suited to homeowners who prioritize energy certification, documented warranty terms, and a large review base as proof of consistent performance.

Best for: Homeowners who prioritize energy certification, a documented multi-decade warranty, and want a large review base to validate consistent service quality before committing.

What to Ask Any Window Company Before Signing

Regardless of which company you choose, these questions protect you before you commit to a window replacement project in Winnipeg:

• Is the installation done by your own crew or a subcontractor? In-house installation typically means more consistent results and clearer accountability when something needs to be corrected.
• What Energy Star tier are the windows certified to? Manitoba falls in the Most Efficient or Zone 3 category. Look for a U-factor of 0.20 or lower and a valid Energy Star Canada label.
• Who is responsible for warranty claims: the manufacturer or the dealer? This matters if the company closes or changes ownership. Manufacturer-backed warranties are more durable.
• What is included in the quote? Confirm whether disposal of old windows, casing and trim, and interior finishing work are included or quoted separately.
• Will you need a City of Winnipeg permit? A straight window-for-window replacement in the same opening typically does not require a permit. Enlarging an opening or structural changes do. A quality company knows the rules and handles permit applications when needed.

Window Replacement Costs in Winnipeg (2026)

Installed window replacement costs in Winnipeg vary by window type, glazing specification, and whether the opening requires any modification:

• Standard double-hung or slider, triple-pane (installed): $800 to $1,400 per window
• Casement window, triple-pane (installed): $900 to $1,600 per window
• Bay or bow window (installed): $3,500 to $7,000 depending on size and configuration
• Basement windows (installed): $400 to $800 per window
• Full-home replacement (average Winnipeg bungalow, 10 to 14 windows): $10,000 to $18,000

Get at least two quotes and confirm each quote specifies the same glass specification, warranty terms, and scope of work. Price differences between quotes often reflect differences in glazing quality rather than installer margin.

Manitoba Hydro Rebates for Window Replacement

Manitoba Hydro's Power Smart program has offered rebates for qualifying window upgrades in the past. Eligibility depends on the U-factor of the installed window, the home's existing insulation levels, and current program availability. Ask your window company whether the products they supply qualify and whether they can assist with the rebate application paperwork. Ecoline's Energy Star certified windows are more likely to meet program thresholds, but local specialists including Korsun can advise on eligible product options as well.

Sources: Korsun Windows (korsunwindows.ca), Nisby (nisby.ca), Ecoline Windows (ecolinewindows.ca), Google reviews (May 2026), Manitoba Hydro Power Smart program, Natural Resources Canada Energy Star Canada, City of Winnipeg Building Inspection, and customer review data from HomeStars and TrustAnalytica.