Multi-layer weather seals effectively block wind, rain, and airborne debris, helping maintain interior comfort and long-term protection.

Casement windows open outward on side hinges, providing smooth, door-like operation.

With double or triple glazing, the Casement is engineered for ENERGY STAR® performance.

Featuring a refined matte surface, casement windows are available in custom sizes and colours.

Casement Windows

The casement window offers an unobstructed view and is second only to the fixed window, as the most weathertight solution. The nature of the casement allows it to open outward, with door-like operation, in which opening and closing is facilitated by hinges on either side of the window. The durable, low-maintenance matte finish of this architecturally-inspired window, is available in custom sizes and colours.

The dual-layer, compressible bulb weatherstripping seals out dust, wind and water. The smooth edge overlap screen features a hidden retention system, and is easily removable.

Opens outward

Door-like opening

Sealed unit

Internal chambers

uPVC material

Jamb extensions

Fusion welded corners

Inside trim

Outside vinyl brickmoulds

Wide Opening, Effortless Access

The very nature of the casement window allows for a 90 degree sash opening, via premium hardware for effortless operation, making it easy to clean windows from the inside.

Custom colour

Another advantage of casement windows is that they come in a variety of styles and colors, allowing you to choose a design that fits your home's aesthetic.

Architectural design
for clear views

Custom
sizing available

Weathertight
and energy efficient

Dual-layer bulb seals
block water & dirt

One handle secures
all lock points

Removable screen
with hidden retention

Premium hardware
for effortless operation

90° sash opening
for easy cleaning

Refined Form with Practical Innovation

The innovative folding operator handle nestles into itself, allowing blinds and curtains to flow freely, without hinderance. This makes the casement window a sleek and elegant choice. Available in both double and triple glaze, the Window Force Casement window is designed to meet ENERGY STAR® qualifications.

Designed to Capture Every Breeze

The opened sash of a casement can act as a funnel by forcing air into the home and offering excellent ventilation. Depending on the direction of the breeze, opening the window more or less will result in a different angle of airflow.

Casement windows are available in both the Ultraslim and Classic series

Ultraslim Series

With a deeper 4-9/16″ frame and a slimmer 2-7/8″ visible profile, the UltraSlim Series with hidden gasket delivers a sleek, modern look while maximizing glass area. It is designed for seamless integration into new construction and larger openings.

Classic Series

A proven 3-1/4″ frame depth with a standard profile, the Classic Series is ideal for retrofit and replacement projects. It delivers excellent thermal performance, a familiar aesthetic, and reliable compatibility with a wide variety of installation conditions.

Highly Customizable

Highly customizable to fit every need, our windows offer a broad selection of options including colors, jambs, casings, brickmoulds, glazing types, including privacy glass, and a variety of grill designs. Tailor your windows precisely to your style and functional preferences for a truly personalized finish.

Colour Options

At Window Force, we offer a carefully curated palette of durable, fade-resistant colours designed to match any architectural style, from classic to contemporary.

Explore Colour Options

Glass Options

We provide a wide range of advanced glass types tailored for modern window systems. From partially transparent decorative glass with artistic textures for enhanced privacy, to high-performance Low-E coatings that improve energy efficiency.

Explore Glass Options

Jambs, Casing, Brickmoulds

Jambs, casings, and brickmoulds come in a variety of sizes to suit different needs, and they're available in a full color palette to complement your design vision. These components provide versatile options for functional and aesthetic window finishing.

Explore Options

Grills Options

If you want to enhance your windows with decorative pane patterns, we offer a flexible range of interior grill shapes to choose from — from the most common layouts to fully custom designs made to fit your style.

Explore Grills Options

Technical Specifications

Model	CAS_IS_CLRCARD-ARG90-CARD180#3_3MM	CAS_IS_CLRCARD-ARG90-CARD180#3_4MM	CAS_IS_CLRCARD-ARG90-CARD180#3-ARG90-CLRCARD_3MM	CAS_IS_CLRCARD-ARG90-CARD180#3-ARG90-CLRCARD_4MM
U-factor (W/m² – K)	1.55	1.54	1.26	1.28
Solar Heat Gain (SHGC)	0.44	0.43	0.41	0.39
Energy Rating	31	31	36	34
ENERGY STAR Zones, 2015	1 \| 2	1 \| 2	1 \| 2 \| 3	1 \| 2 \| 3
ENERGY STAR Zones, 2010	ABC	ABC	ABCD	ABCD
Layers of Glazing	2	2	3	3
NRCan Reference	NR9161-12601923-ES	NR9161-12601927-ES	NR9161-12601931-ES	NR9161-12601935-ES
Energy Efficiency Verification Reference	W535-1	W535-1	W535-1	W535-1
U-factor (Btu/h/ft² – °F)	0.27	0.27	0.22	0.23
Visible Transmittance	0.51	0.5	0.46	0.46
Air Leakage — Infiltration (l/s*m²)	0.19	0.19	0.19	0.19
Air Leakage — Exfiltration (l/s*m²)	0.15	0.15	0.15	0.15

Frequently Asked Questions

What are casement windows and why are they popular in Toronto and GTA?

Casement windows are hinged at the side and open outward like a door, usually operated with a crank. They provide a clean, modern look and excellent visibility, making them a favorite in many Toronto-area homes. These windows work well in tight spaces and are especially popular in kitchens, bathrooms, and basements for their ease of use and airtight seal.

How do casement windows improve ventilation and home comfort?

Casement windows open wide to the outside, which allows for maximum airflow and natural cross-ventilation. They seal tightly when closed, helping keep out drafts and reduce energy loss. With just a simple turn of the handle, you control how much air you let in — ideal for maintaining a comfortable indoor climate throughout the year in the GTA.

Why are casement windows a great choice for Toronto homeowners?

They combine functionality with style. Casement windows offer strong energy efficiency, modern curb appeal, and versatile design options. Plus, when manufactured locally with CSA and Energy Star certifications, they're well-suited for the unique conditions and housing styles in the Toronto region.

What should you know before buying casement windows?

Start with the basics: confirm that your windows come with proper certifications and a strong warranty. Make sure the supplier offers size and design customization, and look for clear details about delivery times. Trust matters too: choose a manufacturer like Window Force that provides full transparency and local expertise.

How does Window Force ensure the quality of every casement window?

Each casement window goes through a precision manufacturing process, starting with high-grade materials and custom-built frames. We follow CSA standards and conduct physical testing on weld strength, corner integrity, and operation. From design to final quality check, we make sure every window performs exactly as promised.

What mistakes should homeowners avoid when choosing casement windows?

Don't assume all windows are created equal. Choosing the wrong size, skipping certifications, or hiring inexperienced installers can lead to costly problems. Avoid low-cost imports that lack proper testing, and always double-check the warranty terms. A well-informed choice today prevents regret later.

Why do dealers choose Window Force as their casement window supplier?

Dealers need products they can stand behind. Window Force casement windows are Canadian-made, backed by robust warranties, and built to meet the high expectations of Toronto's competitive market. We offer consistent inventory, fast turnaround, and dedicated support — helping dealers grow with confidence.