The reduced number of moving parts translates directly into greater reliability, consistent performance, and a significant reduction in required maintenance

Delivering dependable airflow and robust construction through a smoothly operating bottom sash

Single Hung Windows

Window Force Single Hung windows offer a classic design with modern energy efficiency. Featuring a fixed top sash and a smooth-operating bottom sash, they deliver reliable airflow, durable construction, and easy maintenance with a clean, timeless look suitable for any home.

Bottom operable sash

Fixed top sash

Sealed unit

Internal chambers

uPVC material

Jamb extensions

Fusion welded corners

Inside trim

Outside vinyl brickmoulds

Simple, Efficient Ventilation

The operable lower sash allows precise control over fresh airflow, making everyday ventilation effortless and comfortable, while the fixed upper sash improves insulation and energy efficiency, helping maintain a stable indoor climate in all seasons.

Durability With Minimal Upkeep

With fewer moving components, this design delivers long-term reliability and consistent performance while significantly reducing maintenance needs, making it a practical and worry-free choice for everyday living.

Traditional aesthetic
for various home styles

Easy-to-operate
lower sash

Customization
options

Energy-efficient frame
and insulated glazing

Secure locking
mechanisms

Noise-reducing
construction

Low-maintenance
materials

Easy interior
access for cleaning

Refined Frame Geometry

Engineered to maximize glass surface and invite more natural daylight into every space, this refined frame design enhances visual openness while maintaining structural strength, thermal efficiency, and a clean, modern appearance.

Long-Term Warranty Protection

Comprehensive warranty coverage provides lasting peace of mind, protecting your investment with dependable support, reliable service, and confidence in long-term product performance.

Single Hung 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	SHT_IS_CLRCARD-ARG90-CARD180#3	SHT_IS_CLRCARD-ARG90-CARD180#3-ARG90-CLRCARD
U-factor (W/m² – K)	1.72	1.68
Solar Heat Gain (SHGC)	0.53	0.48
Energy Rating	32	30
ENERGY STAR Zones, 2015	1 \| 2	1 \| 2
ENERGY STAR Zones, 2010	ABC	ABC
Layers of Glazing	2	3
NRCan Reference	NR9161-12601997-ES	NR9161-12602001-ES
Energy Efficiency Verification Reference	W535-1	W535-1
U-factor (Btu/h/ft² – °F)	0.3	0.3
Visible Transmittance	0.61	0.56
Air Leakage — Infiltration (l/s*m²)	0.53	0.53
Air Leakage — Exfiltration (l/s*m²)	0.48	0.48

Frequently Asked Questions

What are single hung windows and how do they work?

Single hung windows feature a fixed upper sash and a movable lower sash that slides vertically. This design is simple, space-efficient, and ideal for areas where an outward-opening window might interfere with walkways or landscaping. They're commonly used in bathrooms, basements, and bedrooms—anywhere that needs airflow with a streamlined look.

Why are single hung windows popular in Toronto and GTA homes?

Their appeal comes down to practicality and price. Single hung windows are more affordable than other styles, making them a popular choice in budget-conscious renovations or new builds. Their space-saving design works well with Toronto's dense housing layouts, and they're widely available with local service and customization through suppliers like Window Force.

What are the advantages of single hung vinyl windows?

Vinyl single hung windows are built to last with very little upkeep. Their durable frames won't warp, crack, or peel, and you can choose from a variety of finishes to match your style. Window Force offers vinyl options that deliver reliable insulation, smooth operation, and a clean finish that complements most home designs.

How do single hung windows compare to other window styles?

Compared to double hung windows, single hung styles are simpler—with fewer moving parts, they cost less and require less maintenance. Unlike casement windows, they don't open outward, making them safer in tight exterior spaces. And while sliders open side-to-side, single hung windows are better at sealing vertically against drafts. Each has its place — it's about choosing what suits your layout and goals.

How does Window Force ensure top quality in single hung windows?

We follow a strict manufacturing process that includes precision extrusion, corner welding, and sash alignment checks. Each unit is tested for water resistance, air infiltration, and ease of operation. Our products are CSA-certified and built with high-performance hardware to stand up to everyday use in Toronto homes.

What installation factors affect single hung window performance?

Proper sealing and leveling are critical. If the frame isn't square or the sash doesn't sit properly, air leaks and water intrusion can follow. Insulation around the opening, correct flashing, and a tight perimeter seal make all the difference in long-term efficiency and comfort.

Why do dealers choose Window Force for single hung window supply?

Because we make their jobs easier. Our product line is consistent and always in stock, with clear specs and local support. Dealers get competitive margins, marketing materials, and after-sales service that helps build trust with their customers. It's a win on all sides.