Slim Fix models use an engineered narrow profile to minimize frame thickness, maximizing glass area for a near-frameless look

Exceptional energy efficiency, superior noise control, and versatile design.

Sealed units provide better airtightness and insulation than operable windows

Enduring colors, curated for every style. A fade-resistant palette designed to complement any architecture

Picture Fix and Slim Fix Windows

Picture fix and slim fix windows are non-operable fixed units designed to maximize glass area and provide unobstructed views. A picture window fills the opening with glass and a minimal frame, making it the right choice when a large, clear view is the design objective. A slim fix uses a narrower profile in the same fixed configuration, suited for vertical accent lites and openings where frame width is a constraint. Both types are built on the Classic Series platform, support double and triple glazing, and integrate with operable units in combination assemblies.

Energy efficiency

Noise reduction

Architectural flexibility

Sealed unit

Internal chambers

uPVC material

Fusion welded corners

Maximum natural
light flow

Excellent
thermal insulation

Secure, rigid,
non-operable design

Minimal
maintenance

Key
Features

Non-operable fixed configuration — maximum glass area

No hardware, locks, or operating mechanisms

Picture fix: wide-format fixed lite for panoramic views

Slim fix: narrow-profile fixed lite for vertical accent openings

Structural support for large-span openings

Compatible with combination assemblies alongside operable units

Double or triple glazed, argon fill standard

Fusion-welded corners including interior walls

Hidden gasket design

Suitable for large-format laminated, safety, or specialty glass

How It Works

Fixed picture and slim fix windows have no moving parts. The glass unit is installed directly into the frame, which is then set into the rough opening. Because there is no sash, the frame is shallower and the visible profile can be minimized relative to the glass area. This maximizes the ratio of glass to frame, which is why picture windows are used where views and natural light are the design driver. The absence of operating hardware also eliminates weatherstripping wear points, making fixed windows consistently tight over their service life.

Where It Works Best

Picture windows are placed where a wide, unobstructed view is the primary objective. Common placements include living rooms and great rooms facing gardens, lakes, or landscape features; dining room end walls; and entry walls where a statement window anchors the facade. Slim fix lites are used in narrower positions: flanking an entry door, filling a vertical band in a gable wall, or serving as a sidelight beside a casement or door assembly. Both types are compatible with combination assemblies, so a picture window can be combined with operable awning or casement units above or beside it when ventilation is also needed.

Series Availability

Ultraslim Series

Reduced visible profile (2 7/8″) with deeper frame depth (4 9/16″)
Maximized glass area and clean sightlines
Hidden gasket design
Optimized for new construction and larger openings
Contemporary architectural appearance
Available for contemporary builds requiring the narrowest frame

Explore the Ultraslim Series

Classic Series

Proven standard-profile frame design (3 1/4″ platform)
Optimized for retrofit and replacement applications
Reliable compatibility with a wide range of installation conditions
Balanced performance and traditional aesthetics
Frame depth 3 1/4″
Double-pane 13/16″ overall or triple-pane 1 5/16″ overall
Compatible with Classic Series mullion systems

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.

Multi-chamber vinyl frame built on the Classic Series structural platform, with geometry optimized for large-span non-operable openings

Welded corner construction including interior walls — no adhesives or sealants at corners

Structural support for large-format spans: frame distributes load without a sash; compatible with large-format laminated and safety glass

Hidden gasket for concealed sealing without visible rubber lines

Integration capability with matching operable units through Classic Series mullion and combination assembly systems

Glazing Options

LoĒ-180

Surface 2

High solar heat gain for north and east elevations in cold climates

LoĒ-272

Surface 2

Solar control for south
and west elevations

LoĒ-366

Surface 2

Advanced solar control for high-sun conditions

LoĒ-i89

Surface 4/6

Interior heat reflection for U-factor reduction

Neat+

Self-cleaning coating for exterior surface applications

Safety

Tempered glass where required by code: glass areas exceeding applicable building code thresholds

Security

Laminated glass for security
and sound attenuation in large-format openings

Spacer

Technoform rigid thermoplastic or Super Spacer flexible foam

Double-pane sealed IGUs (13/16″ overall) or triple-pane (1 5/16″ overall)

Argon gas fill comes standard in every unit to improve the overall thermal performance

Privacy and decorative glass textures available

Configurations

All Window Force window types support standardized customization options across Classic and Ultraslim Series, ensuring compatibility and clean integration across mixed window projects.

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

Energy Performance

Series	Glazing	U-Factor, W/(m²·K)	SHGC	Energy Rating
Classic Series	Double Pane	1.21 – 1.51	0.35 – 0.59	34 – 44
Classic Series	Triple Pane	0.83 – 0.86	0.30 – 0.31	38 – 40

Fixed windows achieve the best thermal performance of any window type at equivalent frame size because there are no operating tolerances or weatherstripping wear points.

Technical Specifications

Model	SF_IS_CLRCARD-ARG90-CARD180#3_3MM	SF_IS_CLRCARD-ARG90-CARD180#3_4MM	SF_IS_CLRCARD-ARG90-CARD180#3-ARG90-CLRCARD_3MM	SF_IS_CLRCARD-ARG90-CARD180#3-ARG90-CLRCARD_4MM
U-factor, W/(m²·K)	1.59	1.57	1.23	1.24
Solar Heat Gain (SHGC)	0.59	0.57	0.54	0.52
Energy Rating	39	39	44	43
ENERGY STAR Zones, 2015	1 \| 2 \| 3	1 \| 2 \| 3	1 \| 2 \| 3	1 \| 2 \| 3
ENERGY STAR Zones, 2010	ABCD	ABCD	ABCD	ABCD
Layers of Glazing	2	2	3	3
NRCan Reference	NR9161-12601971-ES	NR9161-12601975-ES	NR9161-12601979-ES	NR9161-12601983-ES
Energy Efficiency Verification Reference	W535-1	W535-1	W535-1	W535-1
U-factor, Btu/(h·ft²·°F)	0.28	0.28	0.22	0.22
Visible Transmittance	0.68	0.67	0.62	0.61
Air Leakage — Infiltration, l/(s·m²)	0.01	0.01	0.01	0.01
Air Leakage — Exfiltration, l/(s·m²)	0	0	0	0

Size Limitations

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

Series	Pane	Width, min – max	Height, min – max	Max Sq.Ft.
Classic Series	Double Glass	12" – 90"	12" – 90"	30 sq.ft.
Classic Series	Triple Glass	12" – 60"	12" – 60"	25 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

Everything you need to know about the product and billing.

What is the difference between a picture window and a slim fix window?

Both are non-operable fixed windows, but they differ in format. A picture window is typically wide relative to its height, designed for panoramic views and often specified as a centrepiece window in a living room or great room wall. A slim fix is a narrower fixed lite in a taller, more vertical format, suited for accent positions beside doors, in gable walls, or in vertical band configurations. Both are built on the same Classic Series frame platform and support the same glazing options.

Do picture windows provide any ventilation?

No. Picture and slim fix windows are non-operable and provide no ventilation. If ventilation is also needed, the typical approach is to combine a picture window with operable units in the same assembly — awning windows placed above the picture window, or casement lites flanking it. Window Force builds combination assemblies with consistent visual profiles across the fixed and operable units.

Is triple-pane glazing available for picture windows?

Yes. Picture fix and slim fix windows support both double-pane (13/16″ overall) and triple-pane (1 5/16″ overall) glazing. A triple-pane picture window delivers some of the best thermal performance available in the Classic Series, with U-factors in the 0.83 to 0.86 range for representative configurations.

Can picture windows span large openings without additional structural support?

Window Force picture fix frames are engineered with structural support for large-format spans, and the frame geometry distributes load appropriately for non-operable openings. However, the rough opening and wall structure must also be designed to support the window load — particularly for very wide or tall units and for large-format laminated glass. Confirm structural requirements with your installer or engineer for openings beyond standard dimensions.

Is tempered or laminated glass required in picture windows?

Building code requirements for safety glazing depend on the window’s position, height above floor, proximity to a door, and the jurisdiction. Picture windows in certain positions — large glass areas near floor level, glass beside doors, glass in stairwells — may require tempered or laminated glass. Window Force can supply both. Confirm the applicable code requirements for your project location before specifying.

Can a picture window be converted to an operable window later?

No — operable and fixed windows have different frame and sash geometries. A fixed picture window frame cannot be retrofitted with an operable sash. If future operability is a possibility, specify an operable casement or awning unit from the start. The visual difference between a fixed casement fix and an operable casement is minimal when the window is closed.

Where does Window Force supply picture and slim fix windows in Canada?

Fixed window configurations are manufactured at our 80,000 sq.ft. facility in Vaughan, Ontario, and shipped to dealers and projects across Canada, including markets in Halifax, Moncton, Montréal, Québec City, Winnipeg, Regina, Saskatoon, Red Deer, Kelowna, and Victoria.

Picture Fix and Slim Fix Windows