Casement Windows in Whitby
Airtight, crank-open casement windows built for Whitby homes — from Brooklin new builds to century homes downtown and in Port Whitby. Unobstructed views, ENERGY STAR vinyl and a lifetime transferable warranty — supplied and installed by our own local crews.
Built for Whitby Homes
Why Casement Windows Suit Whitby’s Housing Stock
Whitby is really two housing markets in one town. North of the 407, Brooklin, Williamsburg and Taunton North are full of two-storey homes built from the late 1990s on — and many of their original builder windows are now 15 to 25 years old. Foggy glass, slipping cranks and winter drafts are the usual signs, and a new casement fixes all three.
South of Highway 2, the century homes around downtown Whitby, Brock Street and Port Whitby have tall, narrow, often out-of-square openings. Closer to the lake, wind and sideways rain off Lake Ontario hit hard — and a casement’s seal gets tighter the harder it blows.
In the established neighbourhoods in between — Lynde Creek, Pringle Creek, Blue Grass Meadows and Rolling Acres — casements give you big, clear glass, easy one-hand cranking over the kitchen sink, and outside glass you can clean from inside the room.
We custom-build every casement to your exact opening — no big-box spacers or fillers. At WindowFixers.ca we both supply and install every window with our own trained crews, from the free in-home measurement to the final cleanup, across Whitby and all of Durham Region.
Serving all of Whitby? See our full Whitby window services.
Why Homeowners Choose Casements
The Advantages of Casement Windows
More airflow, a tighter seal and a cleaner view than almost any other operating window — here is what makes the casement a Whitby favourite.
Easy Crank Operation
A simple fold-down crank swings the sash fully open with one hand — no wrestling with a painted-shut or seized sash. Perfect for hard-to-reach spots above a Whitby kitchen sink or counter.
Airtight Compression Seal
Casements close like a door against a continuous weatherstrip, compressing tight all around. It is the most airtight operating window you can buy — ideal for the wind and sideways rain that blow in off Lake Ontario across Port Whitby and the south end of town.
Unobstructed Views & Light
With no middle rail dividing the glass, a casement is nearly all view. You get maximum daylight and a clean sightline of the lake, the Lynde Creek valley or your backyard.
Full-Opening Ventilation
The sash opens 90 degrees to catch the lake breeze and scoop fresh air into the room — far more airflow than a slider or hung window of the same size.
Egress-Capable Sizing
Because the whole sash opens, a correctly sized casement can serve as a code-compliant egress exit — a smart choice for finished basements and basement suites in both older downtown homes and newer Brooklin and Williamsburg builds.
Low-Maintenance Vinyl
Moisture-proof vinyl (uPVC) frames never rot, rust, swell or need repainting — a real advantage in Whitby’s humid, lakeside climate where wood casements quickly suffer.
Configurations
Casement Window Styles We Install
From a single crank-out sash to a wide French pair or a picture-and-casement combination, we build the configuration that fits your opening and how you want the room to feel. Want the full technical rundown on the casement style itself?
See our casement windows guide
Single Casement
One crank-out sash in a single frame — the classic casement. Great on its own for bathrooms, stairwells and narrow walls, or ganged in a row across a wider opening.
Double / French Casement
Two sashes that crank open from the centre with no post between them. When both are open you get an unobstructed, doorway-wide opening and the fullest possible airflow.
Casement Picture Combination
A large fixed picture pane flanked by operating casements — the best of both worlds: a big, clear backyard or ravine view in the centre with venting sashes on either side.
Fixed Casement-Style
A non-operating unit built to match the sightlines of your operating casements, so a whole wall of windows looks seamless while keeping cost down where venting is not needed.
Energy Efficiency for Whitby’s Climate
Whitby sits right on Lake Ontario, which means humid summers and cold, windy winters — and Brooklin, further north and more exposed, often gets even more snow and wind — so the seal on your windows matters. A casement’s compression seal closes the sash tight against the frame on all four sides — the harder the winter wind presses, the tighter it gets. That is why casements are consistently among the most energy-efficient operating windows.
We pair that tight seal with double- or triple-pane Low-E glass and argon fill, insulated multi-chamber vinyl frames, and warm-edge spacers to cut heat loss and stop the interior condensation that plagues aging builder windows.
Every casement we install is ENERGY STAR certified for the Ontario climate zone, so you get lower heating and cooling bills and a more comfortable, draft-free home year-round.
Compare the Styles
Casement vs Other Window Styles
Not sure a casement is right for every opening? Here is how it stacks up against the other styles we install — and where each one shines.
Casement vs Awning
Both crank outward and seal tight. Casements hinge on the side and open taller; awnings hinge at the top and can stay open in light rain — a common pick for wider, shorter openings.
Explore awning windowsCasement vs Slider
Sliders glide sideways and never project outward, so they suit walkways and decks. Casements seal far tighter and open fully, but need clear swing space outside.
Explore slider windowsCasement vs Hung
Single- and double-hung windows slide vertically and suit the traditional facades around downtown Whitby. Casements are more airtight and energy-efficient, with a cleaner, more modern sightline.
Explore hung windowsCasements, Egress & Whitby Permits
Because the whole sash swings open, a properly sized casement makes an excellent egress window — the emergency exit the Ontario Building Code requires for any legal basement or ground-floor bedroom. Many Whitby and Brooklin homeowners are finishing basements or adding a second suite, and we confirm the clear-opening size that qualifies.
A straight like-for-like window replacement usually does not need a Town of Whitby building permit, but enlarging an opening, cutting a new egress, work on a heritage-designated property in downtown Whitby or Brooklin village, or projects near Lynde Creek, Pringle Creek or the lakeshore can require a permit or Central Lake Ontario Conservation (CLOCA) approval. We tell you plainly what your project needs and handle the details correctly — no guesswork, no surprises.
What to Expect
Our Casement Installation Process
A clear, four-step process so you always know exactly what happens next — from your first measurement to the final walk-through.
Free In-Home Measurement
We measure every opening precisely — including the odd, out-of-square frames common in older downtown Whitby and Port Whitby homes — review your glass, colour and hardware options, and give you an upfront, all-in written price.
Careful Removal
We remove your old wood, aluminum or vinyl casements one opening at a time, protecting your floors and trim, and prepare a solid, square opening for the new unit.
Airtight Install & Seal
Your new vinyl casement is set level, fully insulated and sealed inside and out against Whitby’s lake winds and driving rain — so the crank turns smoothly and the seal stays tight for years.
Finish, Cleanup & Warranty
We finish the trim, haul away every old window and all debris, and back the job with the manufacturer warranty plus our own installation workmanship guarantee.
Why WindowFixers.ca
Whitby's Trusted Casement Window Team
Builder-grade openings in newer subdivisions, out-of-square frames in century homes and lake-effect winters take real experience. Here is why Whitby homeowners choose us for casement replacement.
Our Own Crews — Never Subcontracted
The team that quotes your Whitby home is the team that installs it. Whether it is a century home downtown or a Brooklin new build, the opening gets an experienced installer — and quality and accountability stay in one pair of hands.
Licensed & Fully Insured
A licensed, fully insured local company. Work is done to Ontario code, so your home and our crew are always covered — including egress and basement-suite projects.
Lifetime Transferable Warranty
ENERGY STAR vinyl casements backed by a lifetime, transferable manufacturer warranty — plus our own workmanship guarantee on every install.
Local, Family-Owned, 10+ Years
A decade of installs across Whitby, Durham Region and the wider GTA and 8,700+ happy clients, built almost entirely on referrals — not a faceless national call centre.
What Will Casement Windows Cost?
See real 2026 window prices by style, size and glass — and get an instant ballpark with our free cost calculator — before you ever book a visit.
Casement Windows Whitby FAQ
The questions Whitby homeowners ask us most about casement windows.
Free In-Home Estimate
Book Your Casement Window Quote
Tell us a little about your Whitby home and we will schedule a free in-home measurement and give you an upfront, all-in price — with no pressure and no obligation. Serving Whitby, Brooklin and the wider Durham Region.
Mon–Sun: 7:00 AM – 9:00 PM