Cleaning the exterior glass is simple and safe from indoors, as both sashes are designed to slide

Enhanced structural strength and superior thermal performance are achieved through multiple internal vinyl chambers

Available with either double or triple glazing to suit your performance needs

Both sashes also tilt inward, enabling safe and convenient cleaning and maintenance of the exterior glass

Double Slider Windows

The simplicity of styling and adaptability to many home window applications, make the double slider a popular choice. Both sashes of the double slider slide horizontally within the frame, and are perfect for areas where large windows allow for an unobstructed view, and where maximum ventilation is required.

Since both sashes tilt in and move, exterior cleaning is made easy and can be done from the inside. The easily removable full screen makes it easy to freshen up screens whenever required.

Dual sliding sashes

Tilt-in sashes

Panoramic view

Sealed unit

Internal chambers

uPVC material

Jamb extensions

Fusion welded corners

Inside trim

Outside vinyl brickmoulds

Flexible Configuration Options

Double slider windows offer homeowners the freedom to select the layout that best suits their ventilation needs, room layout, and design preferences.

Easy Inward-Tilting Cleaning

Both sashes tilt inward, allowing safe and convenient access to exterior glass surfaces for cleaning and maintenance without ladders, tools, or professional assistance.

Dual sliding sashes
for balanced airflow

Advanced seals block
wind and rain

Triple or double
glazing available

Energy-efficient
vinyl construction

Smooth Insta-lock
sliding action

Interlocking sash
boosts security

Advanced Multi-Chamber Insulation

Multiple internal vinyl chambers enhance structural strength while improving thermal performance, helping reduce heat loss, increase security, and maintain consistent indoor comfort.

Durable uPVC Construction

Manufactured from premium 100% uPVC compound, the frame resists discoloration, warping, and impact over time, while the Insta-lock shoe system ensures smooth, effortless sash movement for reliable daily operation.

Double Slider 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	DSLO_IS_CLRCARD-ARG90-CARD180#3	DSLO_IS_CLRCARD-ARG90-CARD180#3-ARG90-CLRCARD	DST_IS_CLRCARD-ARG90-CARD180#3	DST_IS_CLRCARD-ARG90-CARD180#3-ARG90-CLRCARD
U-factor (W/m² – K)	1.71	1.65	1.71	1.66
Solar Heat Gain (SHGC)	0.52	0.47	0.52	0.47
Energy Rating	31	29	30	28
ENERGY STAR Zones, 2015	1 \| 2	1 \| 2	1 \| 2	1
ENERGY STAR Zones, 2010	ABC	ABC	ABC	AB
Layers of Glazing	2	3	2	3
NRCan Reference	NR9161-12602002-ES	NR9161-12602006-ES	NR9161-12602007-ES	NR9161-12602011-ES
Energy Efficiency Verification Reference	W535-1	W535-1	W535-1	W535-1
U-factor (Btu/h/ft² – °F)	0.3	0.29	0.3	0.29
Visible Transmittance	0.59	0.54	0.59	0.54
Air Leakage — Infiltration (l/s*m²)	0.85	0.85	1.2	1.2
Air Leakage — Exfiltration (l/s*m²)	1.1	1.1	1.5	1.5

Frequently Asked Questions

What is a double slider window?

A double slider window is a horizontal window where both sashes slide left and right, allowing ventilation from either side. This design is simple, durable, and well suited for everyday residential use in Canada.

Are double slider windows energy efficient?

Yes — when properly manufactured and installed, double slider windows can be highly energy efficient. Performance depends on:

Quality of vinyl frames
Multi-chamber construction
Low-E coated, sealed glass units
Tight weatherstripping and professional installation

Modern double sliders are designed to meet Canadian energy-efficiency standards when paired with proper glazing.

Do double slider windows seal as tightly as casement windows?

Casement windows generally achieve a slightly tighter seal because they close under compression. However, high-quality double slider windows with reinforced frames and precision tracks still provide excellent air-tightness for most homes — especially when drafts are caused by aging windows rather than design type.

Where are double slider windows most commonly used?

Double sliders are commonly installed in:

Bedrooms
Living rooms
Basements
Areas with limited exterior clearance (walkways, decks, fences)

They're especially practical where outward-opening windows would be obstructed.

Are double slider windows easy to maintain?

Yes. One of their biggest advantages is low maintenance:

No cranks or hinges
Smooth sliding tracks
Easy sash removal for cleaning

This makes them a popular choice for homeowners looking for reliability and simplicity.

Are double slider windows suitable for Canadian winters?

Absolutely. When built with welded vinyl frames, insulated glass units, and proper sealing, double slider windows perform well in cold climates. Proper installation is critical to prevent air leakage and heat loss during winter months.

Can double slider windows be customized?

Yes. Double slider windows can be customized with:

Frame colours and finishes
Grille patterns
Frosted or tinted glass
Triple-pane or upgraded glazing options

This allows homeowners to balance appearance, privacy, and performance.

info@windowforce.ca

Tel: 905.761.2030

8810 Jane Street, Concord,
Vaughan, ON – L4K 2M9

Fax: 905.760.8056

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