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

Casement windows are side-hinged operable units designed to deliver maximum glass area, reliable weather tightness, and precise operation. Opening outward, they provide unobstructed views while maintaining consistent perimeter sealing when closed. Casement windows are suitable for both new construction and replacement projects across a wide range of installation conditions.

Available in double- or triple-glazing, Window Force casement windows are engineered for durability, energy efficiency, and long-term performance in demanding climates.

Opens outward

Door-like opening

Sealed unit

Internal chambers

uPVC material

Jamb extensions

Fusion welded corners

Inside trim

Outside vinyl brickmoulds

Custom
sizing available

One handle secures
all lock points

Premium hardware
for effortless operation

90° sash opening
for easy cleaning

Key
Features

Side-hinged sash with outward opening

Single-actuation handle operating all locking points

Multi-point locking system

Premium hardware for smooth, controlled operation

Dual-layer compressible bulb weatherstripping for air and water resistance

Durable, low-maintenance matte vinyl finish

Smooth-edge overlap screen with hidden retention system

90° sash opening allows exterior glass cleaning from the interior

Designed to meet ENERGY STAR® qualification requirements

How It Works

Casement windows have outward-opening sashes hinged at the side and operated from the interior. The sash moves away from the frame as it opens, while the hardware draws it back against the frame when closed, creating compression around the full perimeter. Multi-point locking secures the sash at several points along the frame, while the compression seal helps maintain consistent air and water performance. Casement windows can be configured individually or combined with fixed casement units in a single assembly, allowing operable and fixed sections to share the same visible profile.

Where It Works Best

Casement windows are specified where ventilation, unobstructed views, and controlled airflow are important. Their outward-opening operation provides a clear opening for ventilation and can direct airflow into the room when positioned appropriately. They are commonly used as individual windows, in paired or multi-unit assemblies, and alongside fixed casement units where matching profiles are required across the full window bank. Casements are also well suited to larger openings where multiple operating and fixed units can be combined into a coordinated assembly.

Series Availability

Ultraslim Series

Reduced visible profile with deeper frame depth
Maximized glass area and clean sightlines
Hidden gasket design
Optimized for new construction and larger openings
Contemporary architectural appearance

Explore the Ultraslim Series

Classic Series

Proven standard-profile frame design
Optimized for retrofit and replacement applications
Reliable compatibility with a wide range of installation conditions
Balanced performance and traditional aesthetics

Explore the Classic Series

Frame & Structural Design

uPVC The window system is manufactured using uPVC vinyl extrusion supplied by Vision Extrusions Group, a North American manufacturer specializing in high-performance vinyl profiles. The material is formulated to provide long-term dimensional stability, impact resistance, and resistance to discolouration under varying environmental conditions.

Internal Chambers These windows have the highest number of internal chambers, giving them out-standing insulation and sound abatement qualities, as well as thermal efficiency and increased sturdiness.

Fusion Welded Corners Provide attractive appearance & eliminate the need for adhesive and sealants. There are no imperfections on the completely watertight and airtight surface, Interior walls are also welded.

Outside Vinyl Brickmould

Inside Trim

Jamb Extensions A choice of maintenance-free uPVC, solid vinyl and wooden jamb extensions, frame moldings and corner blocks are available to enhance inside finish.

Sealed Units Sealed glass unit has 13/16” overall thickness. Depending on the model, glazing and different types and thicknesses can be applied, including double, triple and Low-E glazing (3/4” to 1-1/8)

Hidden Gasket Concealed sealing without visible rubber lines.

Designed for compatibility with standard North American wall assemblies and installation practices.

Multi-chamber vinyl frame designed to maintain structural stability in side-hinged configurations.

Reinforced sash construction to support casement-specific operable loads.

Frame geometry optimized for consistent gasket compression along the full perimeter.

Engineered to support double and triple-glazed insulating glass units.

Locking System

Truth operator locking system controlling sash movement and lock engagement

Multi-point locking system distributed along the sash perimeter

Corner drive ensures a consistent locking force at all corners

Locking geometry designed for side-hinged, outward-opening casement sashes with precision-engineered hardware.

Uniform perimeter sealing to support superior air and water performance while improving long-term energy efficiency and weather resistance.

Hardware Components

Heavy-duty hinges designed for side-hinged outward operation

Truth operator handle for controlled sash opening and closing

Anti-pry hardware configuration integrated into the locking system

Operator-driven engagement of multi-point locking hardware provides smooth handle operation, uniform locking pressure, and enhanced weather sealing.

Hardware designed for long-term operational stability under repeated use and daily operation.

Handle Options

Handle styles and finishes vary by series and project configuration.

Slim Lock

Classic Lock

Flat Lock

Push-down Spring-loaded
Screen System

Screen system specifically designed for casement window configurations, ensuring a precise fit, smooth operation, and unobstructed window functionality.

Smooth vertical screen operation independent of sash movement, providing effortless use without interfering with normal window operation.

Interior-removable screen for easy cleaning, seasonal maintenance, and convenient access without removing the entire window unit.

The screen frame integrates seamlessly with the window unit via a concealed retention system that locks it firmly in place.

Glazing Options

Double Glazing

Two panes of glass separated by a sealed air or gas-filled cavity

Triple Glazing

Three panes of glass separated by two sealed insulating cavities

Energy Star

High-performance configurations compliant with standards

Glass Coatings

Multiple glass coatings and performance options available

Configurations

Casement windows support standard Window Force customization for consistent detailing across projects. All selections are standardized across Window Force window systems to ensure compatibility and clean integration.

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

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

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

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

Energy Performance

Casement windows are designed to meet ENERGY STAR® requirements across applicable climate zones. Performance values vary based on glazing configuration, frame series, and overall window size.

Energy Ratings Table

The table below provides a high-level comparison of typical double and triple-glazed casement window configurations. Values are intended for general specification guidance and comparative evaluation of thermal performance characteristics.

Glazing Type	Energy Rating	U-Factor, W/(m²·K)	SHGC	Most Energy Efficient
Double Pane	36	1.25	0.44	No
Triple Pane	42	0.85	0.36	Yes

Energy ratings shown reflect representative configurations. Actual performance values vary depending on glazing package, series selection, and final window configuration.

Certified Performance Data

Certified performance values are available for select casement window configurations and are verified through NRCan and NAFS testing. The table below outlines representative performance data based on glazing configuration, glass thickness, and ENERGY STAR® zone compliance.

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

Actual performance values vary by glazing package, series selection, and configuration.

Size Limitations

The table below outlines standard casement window size limitations for the Canadian market. Maximum dimensions depend on glazing configuration and structural performance requirements.

Pane	Width, min – max	Height, min – max	Max Sq.Ft.
Double Glass	15.5" – 38"	18" – 72"	17 sq.ft.
Triple Glass	15.5" – 36"	18" – 64"	14.5 sq.ft.

Actual size limits may vary based on series selection, glass thickness, and project-specific requirements.

Warranty Coverage

Full warranty details

Up to 25 years: 100% factory coverage, 0% dealer/client
25–30 years: 80% factory coverage, 20% dealer/client
Over 30 years: 25% factory coverage, 75% dealer/client

Glass warranty: 10-year non-prorated sealed unit warranty covering seal failure, internal condensation, and visual obstruction between glass panes

Window Force provides warranty coverage on materials and manufacturing defects under normal use and service conditions. Claims are handled directly through Window Force. Inspection and resolution are coordinated by the factory. Repair or replacement is determined based on assessment.

Covered:

Manufacturing defects in window components, sealed glass unit failure under normal conditions, hardware performance under standard use

Not Covered:

Installation-related issues, damage during handling or after delivery, structural movement or excessive humidity, misuse or modification

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.

Casement Windows