Replacement Windows for Niagara Homes
Upgrade your home with high-performance vinyl windows that are built for Canadian weather and everyday living. At Great Northern Home Exteriors, we install KV Custom Windows that combine energy efficiency, durability, and clean modern styling.
Whether you’re replacing a few problem windows or updating your entire home, our team helps you choose the right window styles, glass options, and installation method to match your budget and the way you live.
- Canadian-made KV Custom Windows designed for our climate
- Multi-chambered vinyl frames that help reduce drafts and heat loss
- Low-E, Argon and triple-pane glass options for improved efficiency
- Retrofit or full-frame installation depending on your home’s needs
- Backed by KV’s product warranty and our 5-year workmanship guarantee
Ready to get started? Tell us about your project and we’ll provide a clear, no-pressure quote for your new windows.
Premium Vinyl Windows Designed for Canadian Homes
At Great Northern Home Exteriors, we install KV Custom Windows — high-performance vinyl windows engineered for durability, efficiency, and year-round comfort. Built in Canada, KV windows are designed to handle our changing climate while providing the clean, modern look homeowners want.
With multi-chambered vinyl frames, fusion-welded corners, and advanced Low-E insulated glass, KV windows deliver excellent thermal performance and long-term reliability without constant maintenance.
- Multi-chambered vinyl frames help reduce heat loss and add structural strength
- Fusion-welded sashes and frames for long-lasting durability
- Advanced weatherstripping and compression seals to help reduce drafts
- High-performance Low-E & Argon glass packages for improved energy efficiency
- Custom sizes, grille styles, colours, and configurations for a perfect fit
- Lifetime limited warranty from KV Custom Windows
Whether you want maximum efficiency, better ventilation, or a cleaner updated look, we’ll help you choose the right KV window style and glass package for your home.
Window Styles We Install
KV Custom Windows are available in a range of vinyl window styles so we can match the look of your home, improve ventilation, and boost curb appeal. During your estimate, we’ll walk you through the options and help you choose the right combination of styles for each room.
Casement Windows
Casement windows are hinged on the side and open outward with a crank handle. They seal tightly when closed and are one of the most efficient options for many homes.
- Excellent energy performance with tight compression seals
- Great ventilation when opened fully
- Ideal for kitchens, living rooms, and hard-to-reach areas
Awning Windows
Awning windows are hinged at the top and open outward from the bottom. They are perfect for adding airflow in smaller spaces while keeping light rain out.
- Can be left slightly open during light rain
- Great for bathrooms, kitchens, and tight spaces
- Often paired with picture windows for extra ventilation
Sliding Windows
Slider windows glide horizontally on reinforced tracks and are a smart choice where a swinging sash would be in the way.
- Space-saving design – no sash swinging in or out
- Easy to operate and clean
- Perfect near decks, walkways, and smaller rooms
Double Hung Windows
Double hung windows have two movable sashes that slide up and down. They offer flexible ventilation and a classic, traditional appearance.
- Open from the top, bottom, or both for airflow
- Tilt-in sashes for easy cleaning from inside
- Great for bedrooms and main-floor rooms
Picture, Bay & Bow Windows
Picture windows are fixed units that maximize natural light and outdoor views, while bay and bow windows project outward to add extra space and architectural interest.
- Picture windows – large, fixed glass areas for views and light
- Bay windows – three-panel units that extend outward for added space
- Bow windows – four or more panels creating a gentle curve
No matter which style you choose, KV Custom Windows are built for efficiency, durability, and low maintenance. We’ll help you mix and match styles so your home looks great from every angle.
Window Installation Options
Every home is different. That’s why we offer both retrofit and full-frame (brick-to-brick) installation for KV Custom Windows. We’ll inspect your existing frames and finishes, then recommend the approach that makes the most sense for your home and budget.
Retrofit (Insert) Installation
With a retrofit installation, your new vinyl windows are installed into the existing wood frame. This is a great option when the current frame and interior trim are still in good condition and you want to keep disruption to a minimum.
- Less invasive – most interior trim can stay in place
- Cost-effective for many homes
- Exterior aluminum capping for a clean, low-maintenance finish
Full-Frame (Brick-to-Brick) Installation
A full-frame installation involves removing the entire existing window right back to the wall framing. This allows us to check for water damage, improve insulation around the opening, and completely refresh both the interior and exterior finishes.
- Best choice when existing frames are rotted, warped, or poorly sealed
- Includes new jamb extensions and interior casings for a fully updated look
- Optional vinyl brickmould on the exterior for sharp, low-maintenance detail
During your quote, we’ll explain the pros and cons of each method so you can feel confident choosing the installation type that’s right for your home.
KV Window Colours & Grill Options
KV Custom Windows offers a wide range of exterior colours and interior finishes so your new windows match the look of your home perfectly. All colours are factory-applied for long-lasting durability and low maintenance.
Popular Exterior Colours
- White
- Black
- Commercial Brown
- Chestnut Brown
- Sable
- Sandstone
Interior Finishes
- White vinyl
- Paintable / Stainable jamb extensions
- Modern trim packages available
Grill (Muntin) Options
- Internal grills for a smooth, easy-clean interior
- Colonial – traditional square pattern
- Prairie – clean perimeter style
- Custom configurations available on most window styles
Whether you prefer a modern look or something more classic, we’ll help you choose the perfect colour and grill combination for your home.
Energy-Efficient Glass Packages
KV Custom Windows offer high-performance glass packages designed specifically for Canadian weather. Whether you want to reduce heat loss, block UV rays, or increase comfort year-round, we’ll help you choose the right configuration for your home.
Low-E Glass Coatings
Low-E (Low Emissivity) is a microscopic coating applied to the glass that helps regulate temperature by reducing heat transfer while still allowing natural light to pass through.
Low-E
A strong all-purpose performer that helps reduce fading and improves overall comfort.
Low-E2
Enhanced insulation for colder climates. Helps reduce drafts and cold spots near windows.
Low-E3
A triple-layer coating offering maximum efficiency. Ideal for south- or west-facing windows where solar heat gain is highest.
Argon Gas
Argon gas is added between the glass panes to reduce heat transfer and increase energy efficiency. Argon provides a higher R-value, making your home more comfortable in both summer and winter.
White “S” Class Super Spacer®
KV Custom Windows use the White “S” Class Super Spacer® — a premium non-metal, warm-edge insulating spacer that dramatically reduces condensation around the glass edge.
Condensation forms first on the coldest part of a window. With older aluminum spacers, the glass edge becomes cold quickly, causing moisture to appear even at low humidity levels.
The Super Spacer’s non-metal foam construction keeps the glass perimeter warmer, improves insulation, and helps keep your windows clear and comfortable.
- Helps prevent edge-of-glass condensation
- Non-metal design reduces heat loss
- Improves long-term seal durability
- Boosts overall window energy performance
Double-Pane vs Triple-Pane
Double-Pane
Excellent value and comfort for most homes. Great energy efficiency with a lighter overall window weight.
Triple-Pane
Maximum insulation and noise reduction. Ideal for larger windows, cold rooms, or homes near high-traffic areas.
KV Window Construction & Hardware
KV Custom Windows are engineered for long-term performance in Canadian weather. From the welded frames to the quality hardware, every detail is designed to help your windows operate smoothly and look great for years.
Durable Vinyl Frame Construction
- Multi-chambered vinyl frames and sashes for strength and stability
- Fusion-welded corners to help prevent air and water infiltration
- Sloped sills and drainage channels to move water away from the glass
- Quality weatherstripping to help reduce drafts and improve comfort
Smooth, Reliable Hardware
- Easy-operating crank hardware on casement and awning windows
- Multi-point locking systems on many styles for a tighter seal
- Low-profile handles that fold away to keep blinds and shades clear
- Durable lock mechanisms designed for everyday use
Low-Maintenance Vinyl Exterior
- Vinyl exteriors that never need painting or staining
- Fade-resistant finishes to help maintain curb appeal
- Simple cleaning with mild soap and water
When we visit your home, we’ll walk you through how the windows operate, how the locks work, and what to expect for maintenance, so you feel confident in your investment.
KV Custom Windows Warranty
KV Custom Windows provides one of the strongest warranties in the industry, giving homeowners long-term peace of mind. Their warranty covers the window frame, hardware, and insulating glass against defects in material and manufacturing.
Lifetime Warranty on White & Solid Cream Windows
White and solid cream PVC windows are covered for the lifetime of the product against blistering, peeling, cracking, flaking, or non-uniform fading.
15-Year Warranty on Painted Exterior Windows
Windows with factory-applied exterior paint come with a 15-year warranty. Note: paint touch-up kits are available for corner weld variation.
Lifetime (Limited) Warranty on Insulating Glass
KV’s insulating glass units are warrantied for the lifetime of the window against seal failure that leads to fogging between the panes. (Broken glass is not covered.)
Lifetime Warranty on Window Hardware
All window hardware is covered for life against manufacturing defects. (Damage from misuse or alteration is not covered.)
Full warranty details, limitations, exclusions, and transfer procedures can be found in the official KV Custom Windows Warranty document.
Why Choose Great Northern Home Exteriors
When replacing your windows, you want a company that delivers quality products, professional installation, and honest guidance. That’s exactly what Great Northern Home Exteriors is built on.
Locally Owned & Operated
We’re a Niagara-based business — not a franchise and not a high-pressure sales outfit. You get local expertise and a team that treats your home with respect.
Professional, In-House Installation
Every window is installed by trained professionals following proper retrofit and full-frame methods. No rushed jobs, no messy shortcuts — just high-quality workmanship.
Top-Quality KV Custom Windows
We proudly install KV Custom Windows for their performance, durability, energy efficiency, and clean, modern look. These are windows designed specifically for Canadian weather.
Straightforward Quotes & Honest Advice
You’ll never experience pressure, upselling, or sales gimmicks. We simply explain your options, answer your questions, and provide a clear, detailed quote.
Excellent Warranty Protection
KV provides strong product warranties, and we stand behind our installation with workmanship support you can rely on.
Whether you need one window or a full home of replacements, Great Northern Home Exteriors delivers trusted, long-lasting results.
Get Your Free Window Replacement Estimate
Ready to upgrade your home with beautiful, energy-efficient KV Custom Windows? Our team provides clear pricing, honest recommendations, and professional installation — no pressure, no surprises.