PROUDLY CANADIAN COMPANY OWNED & OPERATED IN TORONTO SINCE 1989!
PROUDLY CANADIAN COMPANY OWNED & OPERATED IN TORONTO SINCE 1989!
Are you looking to replace your current windows? Do you need windows for your new home build? When comparing options for window replacement and new construction, there are several factors to consider:
Delco Windows & Doors of Toronto has been the choice window installer for homeowners in the GTA since 1989. Delco Windows & Doors specializes in manufacturing and installing high-efficiency replacement vinyl windows, through the use of thermal vinyl UPVC window frame construction. Whether you are looking to replace your old metal, wood, or single pane windows with energy efficient double pane and triple pane windows, or simply want to upgrade your old windows to a new modern style, Delco is your all-inclusive window replacement specialist.
Delco knows Toronto. Delco knows windows.
| Product | U-Factor (W/m²·K) | U-Factor (Btu/h·ft²·°F) | SHGC | ER | VT |
| Casement Window | 0.97 | 0.17 | 0.38 | 40 | 0.45 |
| Awning Window | 0.97 | 0.17 | 0.38 | 41 | 0.45 |
| Single Hung Window | 1.02 | 0.19 | 0.44 | 42 | 0.52 |
| Geometric Shaped Window | 0.85 | 0.15 | 0.50 | 50 | 0.60 |
| Single Slider Window | 1.02 | 0.19 | 0.44 | 39 | 0.52 |
| Double Hung Window | 1.02 | 0.19 | 0.44 | 42 | 0.52 |
| Bay Window | — | — | — | — | — |
| Tilt & Turn Window | 0.85–1.05 | 0.15–0.18 | ≈0.12– 0.40 | 40+ | ≈0.45– 0.60 |
| Double Slider Window | 1.02 | 0.19 | 0.43 | 39 | 0.51 |
| Picture Window | 0.85 | 0.15 | 0.50 | 50 | 0.60 |
| Bow Window | — | — | — | — | — |
| Basement Window | — | — | — | — | — |
ENERGY STAR® Canada (windows): U-factor ≤ 1.22 W/m²·K *(≈ 0.21 Btu/h·ft²·°F) or Energy Rating ER ≥ 34
ENERGY STAR® “Most Efficient” 2025 (windows): U-factor ≤ 1.05 W/m²·K *(≈ 0.18 Btu/h·ft²·°F) or ER ≥ 40
Tip: ER balances U-factor, SHGC, and air leakage; higher ER = better overall performance in Canadian climates.
Delco Windows & Doors has the latest cutting-edge window technology to choose from:
We help homeowners replace their windows in order to create a home that is energy efficient, sound reducing, solid, yet with healthy ventilation for years to come. Helping you with the right home replacement window that matches your style and budget is what we do best. Home renovations, and new home builds are good reasons to replace windows. Upgrading windows is an investment not only in a house’s value, but also in the quality of life and peace of mind. You can soon enjoy living in a comfortable warm home plus you’ll have new windows that are low maintenance and easy to use.
Are your old windows drafty? Are they noisy? Are you looking for a way to facelift your home’s style and value?
Window replacement remains one of the top choices for investment return for homeowners.
Windows truly do come in all shapes and sizes. Bathroom windows. Bedroom windows. Kitchen bay windows. Your home has a unique style, and having the right size to match your existing window openings, or customize the opening for a larger or smaller window, can all be done through Delco’s precision installation process. We precisely measure, and then either match to standard sizes, or custom-manufacture based on your preference. Our window installers will assess your needs and preferences and make a window that fits, . . . creating a stylish, modern home
Delco Windows & Doors offers all standard, as well as custom styles that make that perfect match for your home. The type of window you need matters. The look of your home, whether modern, urban, country, classic, historic, or other, makes it essential to choose the right style of window for your house.
In addition, we offer the right colour match and finishes to fit your needs. You can choose a standard colour or, custom frame colour that perfectly enhances your home’s interior and exterior.
Vinyl (PVC) | Aluminum | Wood | Fiberglass | |
|  |  |  | |
Cost | ★ Lowest upfront; best value | $$–$$$ higher than vinyl | $$$ higher; varies by species/cladding | $$–$$$ higher than vinyl |
Energy Efficiency | ★ Good insulation; multi-chamber frames; meets ENERGY STAR easily | Poor unless thermally broken; conducts heat | Very good natural insulator | Excellent; low thermal expansion; great with triple-pane |
Maintenance | ★ Virtually none; no painting; easy to clean | Low; powder-coat or anodize holds up | High; needs painting/staining unless clad | Low; can be repainted, very durable |
Durability | ★ Long-lasting; resists rot and moisture | Strong, slim frames; can corrode if untreated | Can warp/rot without care | Very strong, stable; resists swelling/shrinkage |
Design / Aesthetics | ★ Many colors/finishes; modern look | Sleek, slim sightlines for modern homes | Warm, traditional, natural wood grain | Clean modern; painted finishes hold color well |
Best For | ★ Most Toronto homes; cost-to-comfort sweet spot | Modern designs with narrow frames | Heritage/traditional homes; authenticity | Premium projects needing strength + performance |
When looking for the best replacement windows Toronto has to offer, consider Delco Windows and Doors. Our hundreds of models allow you to create the exact style you want to turn your house into a home to cherish. In addition, our unique direct-to-manufacturer prices give you savings over other Toronto dealers. When researching replacement windows Toronto, see why thousands of homeowners and businesses throughout GTA have chosen Delco for premium replacement windows at the lowest price.
Whether you want to fix a broken window, or upgrade your style, or simply want to save energy throughout the year, replacement windows can fix your window problems fast, and give you comfort for years to come. While some homeowners wait for a crack or defective window to develop, most replacement windows are actually for house upgrades.
Painting your home? Upgrading your style? Making your home energy efficient? Delco provides replacement windows Toronto needs for the next generation. Long lasting. efficient, and long-term money saving value. Increase your home value, while increasing your comfort. And best yet, we will help you see if you are qualified for Canadian government credits and incentives to help pay for your brand new, beautiful replacement windows. Our team of window installers will help you through the entire process so each replacement window helps your house become the home of your dreams.
How can you tell whether your new vinyl windows in Toronto will fit properly and keep drafts out? Delco Windows and Doors manufactures its own vinyl windows and installs them with its own trained crews, without subcontractors. On site, the work follows a measured process that accounts for the condition of your existing openings, the requirements of UPVC frames, and the finishing needed to protect your home.
Our installers assess the existing frames, surrounding trim, and visible signs of moisture damage before taking measurements. This helps determine whether the replacement will fit within the existing frame or whether removing the entire assembly will better address deteriorated materials or gaps around the opening.
During vinyl window installation in Toronto, the crew removes the existing units according to the agreed replacement method and prepares the openings. Installers position the new vinyl frames using appropriate shims and fasteners, ensuring each window stays level, square, and properly supported without distorting the frame.
The team insulates and seals the perimeter while accounting for drainage and moisture management. The team then completes interior and exterior finishing and checks sash movement, locking hardware, and visible seals. Some trim removal and temporary exposure of the opening are normal during replacement.
The right vinyl window replacement method depends on the condition of your existing frames, surrounding materials, and window openings. Two common approaches are insert replacement and full-frame replacement, each suited to different circumstances.
If the existing frame is structurally sound, an insert window may fit within it without removing the entire assembly. This approach can preserve surrounding trim and reduce disruption, although retaining the old frame may slightly reduce the visible glass area.
What if your current windows have deteriorating frames, hidden moisture damage, or persistent drafts around the opening? Full-frame replacement removes the existing assembly, allowing installers to inspect the surrounding structure, address damaged materials, and properly position and seal the new vinyl window.
Delco Windows and Doors evaluates your openings before recommending an installation approach, helping you avoid unnecessary removal while addressing problems that could affect long-term comfort.
The timeline for vinyl window replacement in Toronto depends on how many windows you are replacing, whether the existing openings need repairs, and how long manufacturing takes. For a standard home, the installation itself is typically completed in one to three days, and we confirm the timeline for your project before work begins.
Once your openings are measured and your selections confirmed, the order goes into in-house manufacturing, and installation is scheduled around product readiness and crew availability.
Worried about having several rooms disrupted at once? Replacing windows within sound existing openings is generally less involved than removing deteriorated frames or correcting damaged surrounding materials. Weather conditions, custom configurations, and unexpected problems discovered during removal can also affect scheduling.
The cost of vinyl window replacement in Toronto depends on the window style, dimensions, glazing, installation method, and condition of the existing opening. Delco Windows and Doors offers several vinyl window configurations, with listed prices varying by style, but your final quote depends on your project's requirements.
Larger units, custom dimensions, and specialized operating mechanisms can affect material costs.
Double-pane and triple-pane configurations, Low-E coatings, and insulating gas fills influence pricing.
Full-frame removal, damaged framing, and additional interior or exterior finishing may increase labour costs.
Concerned about paying for work your windows do not actually need? A free consultation lets you review your options, discuss installation requirements, and get pricing before committing.
In Toronto, replacing an existing vinyl window without changing the opening size generally does not require a building permit. However, enlarging an opening, changing structural supports, or creating a new window opening may require a permit and additional review.
Planning to make a small bedroom window larger or replace an aging window in a brick wall? The scope of the work matters because modifications can affect structural framing, lintels, and applicable Ontario Building Code requirements. Heritage property restrictions and condominium approval requirements may also apply.
New vinyl windows should provide lasting comfort, but what happens if a seal fails or a window becomes difficult to operate after installation? Delco Windows and Doors backs its products with a comprehensive, fully transferable, non-prorated lifetime warranty covering window frames, sealed-glass failure, hardware, and components, subject to the warranty terms. Because the same company manufactures and installs your windows, you have one point of contact if anything needs attention, instead of a supplier and a separate installation contractor.
Delco Windows and Doors provides vinyl window installation and replacement throughout Toronto, helping residents address drafty rooms, deteriorating frames, and windows that no longer operate properly.
Book a free consultation to discuss your Toronto window replacement project and arrange the next steps.
Recommended before replacing multiple windows or choosing a new glass package.
Our process begins with a personalized design consultation. Our experts work closely with you to understand your needs and preferences, providing tailored design options that match your home’s style.
After finalizing the design, we take precise measurements of your openings. Our skilled craftsmen then manufacture your doors and windows in our Toronto facility, using high-quality materials and advanced techniques.
Our certified installers handle the installation with care and professionalism, ensuring a perfect fit for optimal performance and aesthetics. We work efficiently, minimizing disruption and leaving your home clean
Our commitment continues after installation with comprehensive support. Whether you need maintenance advice, adjustments, or warranty services, our dedicated team is always ready to assist.
Make your project a reality with convenient financing options*
*Subject to credit approval.
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Quality New Windows & Doors. Competitively Priced!
Christine R.
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