Custom Windows — Built to Your Exact Size & Configuration
Non-standard opening? Discontinued size? Complex combination unit? Every WindowFixers.ca window is built to order — measured, manufactured and installed to fit your home perfectly. Factory-direct vinyl, own crews, serving the GTA north to Barrie.
What Does "Custom" Really Mean?
Every WindowFixers.ca window is manufactured to order. We do not pull pre-made stock sizes off a shelf and hope they fit — we laser-measure your openings and build each unit to those exact dimensions, in the style and configuration you choose.
That means no shimming, no filler strips, no "close enough." The result is a tighter seal, better insulation, cleaner lines and a longer-lasting installation — whether you are replacing a single window or an entire houseful.
Non-Standard Openings
Odd widths, unusual heights, out-of-square frames — every opening gets a window built specifically for it.
Discontinued Sizes
Old builder-grade window no longer made? We measure the rough opening and manufacture an exact replacement.
Combination Units
Fixed + operable, transoms, mulled triples, bay/bow assemblies — all built as one sealed, structurally integrated frame.
Heritage & Character Homes
Match the look of original woodwork with modern vinyl performance — custom profiles, grilles and proportions.
Performance Upgrades
Triple pane, Low-E, argon, laminated glass, obscure — pick the exact glass package your exposure needs.
Custom Colours & Finishes
Black, walnut, iron ore, clay — choose exterior and interior colours that complement your home's palette.
Custom Window Styles We Build in Any Size
Every operating style below is manufactured to your exact measurements. Click to learn more about each type.
Need a non-rectangular shape — arches, circles, triangles, trapezoids? See Custom & Specialty Shapes
Popular Custom Configurations
Why settle for a single window when you can combine styles into one mulled, sealed unit? Here are the combinations GTA homeowners request most.
| Configuration | Description | Common Use |
|---|---|---|
| Fixed + Casement Sidelights | A large picture centre flanked by operable casements on each side for both views and ventilation. | Living rooms, great rooms, master bedrooms |
| Picture + Awning Below | Fixed upper lite with an awning section underneath that hinges outward for airflow even in light rain. | Kitchens, bathrooms, above counters |
| Triple Casement Mulled Unit | Three casement windows mulled into a single frame — maximum ventilation with a unified, clean look. | Open-concept rooms, sunrooms |
| Transom Over Operable | A fixed transom lite on top with a casement, hung or slider below, adding height and daylight. | Tall walls, stairwells, foyers |
| Double Slider + Fixed Centre | Two horizontal sliders flanking a fixed centre panel — wide openings with balanced air flow. | Dining rooms, basements, wide openings |
| Bay / Bow Combination | A projecting assembly of fixed and operable sections that adds floor space, light and curb appeal. | Front-facing rooms, breakfast nooks |
Built as One Sealed Unit — Not Pieces Joined Together
When you order a combination window from WindowFixers.ca, the sections are mulled and sealed at the factory as a single structural frame — not separate windows butted together on-site with a mull strip. The result is better insulation, a cleaner profile and a stronger unit that will not separate over time.
Custom Window Size Ranges
Vinyl windows can be built in a remarkably wide range of sizes. Below are the approximate minimums and maximums by style — if your opening falls outside these ranges, we will find a solution.
| Window Style | Min Width | Max Width | Min Height | Max Height |
|---|---|---|---|---|
| Casement | 12" | 36" | 24" | 72" |
| Awning | 18" | 60" | 14" | 48" |
| Single/Double Hung | 18" | 44" | 24" | 78" |
| Horizontal Slider | 24" | 96" | 18" | 60" |
| Picture (Fixed) | 8" | 96" | 8" | 96" |
| Geometric / Shaped | By template | By template | By template | By template |
Large Custom Windows
Need a floor-to-ceiling picture window or a wall of glass? Fixed units can reach 96" × 96". For larger spans we mull multiple units into one frame for a seamless look.
Small Custom Windows
Basement hoppers, sidelights, transoms and bathroom windows as small as 8" × 8". No opening is too small — we build to the exact dimension.
Glass & Performance Options
The glass package is where performance lives. Choose the combination that matches your exposure, your climate zone and your priorities — comfort, noise reduction, security or privacy.
Low-E Coating (LoE-180 / LoE-272)
Reflects heat back into the room in winter; blocks solar heat gain in summer.
Argon Gas Fill
Denser than air — insulates ~33% better between panes and reduces condensation.
Triple Pane
Three glass lites + two gas-filled cavities for the highest thermal performance and noise reduction.
Tempered / Safety Glass
Required by code in certain locations; shatters into small granules instead of shards.
Laminated Glass
A tough PVB interlayer holds the pane together on impact — ideal for ground-floor security.
Obscure / Frosted Glass
Light in, privacy preserved — perfect for bathrooms, side-door lites and basement windows.
Tinted Glass
Reduces glare and solar heat gain on south- and west-facing exposures.
Colours, Grilles & Finishes
Your custom windows should match your home — not the other way around. Choose from a range of exterior frame colours, interior woodgrain finishes and decorative grille patterns.
Exterior Colours
Interior Finishes
Grille Patterns
How Custom Windows Are Made & Installed
From first measurement to final warranty — four straightforward steps, handled by one team.
Measure & Template
We visit your home and laser-measure every opening — including odd sizes, arches and non-square frames. Nothing is guessed, nothing is "close enough."
Factory Manufacturing
Your windows are built to your exact specs at a Canadian vinyl window factory — welded corners, multi-chamber frames, your chosen glass and colour.
Professional Installation
Our own trained crews install every window — no subcontractors. Foam-sealed, capped, caulked and tested for operation and air-tightness on the spot.
Warranty & Follow-up
Every custom window is backed by a lifetime frame warranty and a multi-year sealed-unit guarantee. We follow up to make sure you are happy.
What Affects Custom Window Pricing?
Size, style, configuration, glass package and colour all influence the final price of a custom window. Because we buy factory-direct with no dealer mark-up, our pricing stays competitive — often lower than big-box alternatives that still need shimming to fit. See real 2026 window prices by style and size, and get an instant ballpark with our free cost calculator.
Why GTA Homeowners Choose WindowFixers.ca for Custom Windows
Factory-Direct, No Middleman
We order directly from the manufacturer with no dealer mark-up — you get custom quality at a competitive price.
Own Crews, Never Subcontracted
Every install is done by our own licensed, insured team. One point of contact, one standard of quality.
True Custom Sizing
We do not stock standard sizes and hope they fit. Every window is built to your exact opening — no shimming, no compromise.
GTA to Barrie Coverage
Based in Newmarket, we serve every community from downtown Toronto through York Region, Peel, Halton and Durham north to Barrie and Simcoe County.
Honest, Transparent Pricing
No hidden fees, no pressure tactics. You get a written quote that covers materials, installation, trim and clean-up — the price you see is the price you pay.
Lifetime Warranty
Every vinyl frame carries a lifetime warranty. Sealed units, hardware and installation workmanship are guaranteed for years of trouble-free performance.
Custom Windows — Frequently Asked Questions
The questions GTA homeowners ask us most about ordering custom-built vinyl windows.
Get a Free Custom Window Quote
Tell us about your project and we will get back to you within one business day with an honest, no-pressure quote — covering custom manufacturing, installation, trim and clean-up.