Classic Series Vinyl Windows

The Classic Series is Window Force’s proven retrofit and replacement window. Its 3-1/4″ frame depth is precision-manufactured to slide into existing window openings without disturbing the surrounding interior or exterior trim — the practical, dependable choice for upgrading windows in established homes. A familiar profile, broad installation compatibility, and excellent thermal performance, all custom-built to order at our 80,000 sq ft facility in Concord, Vaughan.

Classic Series Vinyl Window

Designed for Replacement

Replacing aging windows shouldn’t mean tearing apart your walls. The Classic Series is built to fit the opening that’s already there: each unit is sized to the existing rough opening so it installs without removing or rebuilding the interior and exterior trim. That makes it well suited to the large inventory of homes built through the 1980s and 1990s — and to any project where keeping the surrounding finishes intact matters.
Classic Series

A Familiar Look That Fits

The 3-1/4″ standard profile carries the proportions homeowners expect from a traditional window, so replacements blend in with the home’s existing character rather than standing out. Combined with a range of colours and finishes, the Classic Series updates performance without changing the look you already live with.

Engineering and Construction

Window Force Classic Series Profile

Lead-free uPVC multi-chamber profile: the chambered interior adds rigidity and traps air for better thermal performance across the frame.

Fusion-welded corners: frame corners are heat-welded into a single continuous piece, sealing out air and water at the most vulnerable point of any window.

Dual-seal warm-edge spacer: the metal-free spacer between the panes keeps the glass edge warmer, cutting heat transfer and reducing condensation.

Installation compatibility: the proven 3-1/4″ depth works cleanly across a wide variety of existing wall and opening conditions.

Custom-manufactured to order: every Classic window is built to the exact dimensions of your opening, from standard sizes to architectural shapes.

Glass and Glazing Options

Double Glazing

Double Glazing

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

Triple Glazing

Triple Glazing

Three panes of glass separated by two sealed insulating cavities

Energy Star

Energy Star

High-performance configurations compliant with standards

Glass Coatings

Glass Coatings

Multiple glass coatings and performance options available

Available Window Styles

The Classic Series can be produced across the full Window Force lineup:

Casement Casement

Tight sealing and excellent ventilation

Awning Awning

Weather-protected airflow

Single Hung Single Hung

Traditional vertical operation

Double Hung Double Hung

Traditional vertical operation. Double

Single Slider Single Slider

Space-efficient horizontal operation

Double Slider Double Slider

Space-efficient horizontal operation. Double

High Fix / Casement Fix High Fix / Casement Fix

Deliver unobstructed upper-wall light

Picture Fix / Slim Fix Picture Fix / Slim Fix

Maximum glass and unobstructed views

Bay and Bow Bay and Bow

Added space, light, and architectural depth

Shapes Shapes

Custom architectural shapes

Specifications

  Classic Series Ultraslim Series
Frame depth 3-1/4″ 4-9/16″
Visible profile (sightline) 3-1/4″ 2-7/8″
Gasket Concealed / hidden Concealed / hidden
Frame material Lead-free uPVC,
multi-chamber		 Lead-free uPVC,
multi-chamber
Corner construction Fusion-welded Fusion-welded
Spacer Dual-seal warm-edge Dual-seal warm-edge
Glazing Double- or triple-pane;
15+ glass configurations		 Double- or triple-pane;
15+ glass configurations
Best suited for Retrofit and replacement in existing homes New construction, large openings, modern designs
Installation Fits existing openings;
available through authorized dealers and contractors		 Optional nailing fin;
available through authorized dealers and contractors
Certification CSA certified;
ENERGY STAR® Partner		 CSA certified;
ENERGY STAR® Partner

Why Window Force

Window Force is a Canadian vinyl window manufacturer operating from an 80,000 sq ft production facility in Concord, Vaughan since 2007. We hold CSA certification and operate as an ENERGY STAR® Partner. Every window is custom-manufactured to order — built to your exact specifications rather than pulled from inventory — and backed by a comprehensive transferable warranty.

80K+
Square feet of
production facility
50K+
Windows manufactured
annually
450+
Active trade partners
across Ontario

We supply builders, dealers, and contractors across Canada and also accept direct homeowner orders, with professional installation available through our network of authorized dealers and contractors.

For
Home Builders

Whether you're framing a single custom home or a multi-unit residential development, Window Force provides consistent product quality, reliable lead times, and a straightforward supply-only model. Order windows to your schedule, have your crew install — no subcontracting middlemen, no installation coordination delays.

For Contractors
& Renovators

Room addition? Second-storey addition? Gut renovation with exposed framing? New construction windows give you full flexibility in rough opening sizing and placement. The optional nailing fin attaches directly to the stud framing before your cladding crew arrives — no brick moulds, no frame-in-frame compromises.

For Custom
Home Owners

Building your first or forever home? Window Force works directly with homeowners on custom builds. We help specify the right window style, glazing package, and frame configuration for every room — from large fixed picture windows in the great room to awning or casement units in kitchens and bathrooms.

For Architects
& Designers

The Classic Series is available with full technical specifications, NAFS ratings, and architectural drawings for permit submissions. We work with design professionals to ensure specified windows match both performance requirements and aesthetic intent.

Frequently Asked Questions

What’s the difference between the Classic Series and the Ultraslim Series?

The Classic Series uses a proven 3-1/4″ frame depth designed to fit into existing openings, making it ideal for retrofit and replacement projects in established homes. The Ultraslim Series uses a deeper 4-9/16″ frame with a slim 2-7/8″ sightline and hidden gasket for a modern, maximum-glass look, and is built for new construction and larger openings.

Will the Classic Series fit my existing window openings?

Yes, that’s what it’s built for. Each window is custom-manufactured to your exact opening dimensions and the 3-1/4″ depth is compatible with a wide range of existing conditions, so it slides into the current opening without major modifications.

Do I have to replace the trim around my windows?

In most cases, no. The Classic Series is designed to install into the existing opening without disturbing the interior or exterior trim, which is one of the main reasons it’s the preferred choice for replacement work.

Is the Classic Series energy efficient?

Yes. The multi-chamber uPVC profile, fusion-welded corners, and dual-seal warm-edge spacer all support thermal performance. Paired with the right Low-E and gas-fill glazing, the Classic Series meets or exceeds ENERGY STAR® requirements.

Is triple-pane glazing available?

Yes. The Classic Series is available in both double-pane and triple-pane configurations, along with Low-E coatings, argon fill, tempered, laminated, and decorative privacy glass.

Trade Support

Ready to replace aging windows? Talk to our team about the Classic Series. Request a custom quote online or call 905.761.2030, and we’ll help confirm measurements, styles, glazing, and the best fit for your home.

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Tel: 905.761.2030
8810 Jane Street, Concord,
Vaughan, ON – L4K 2M9
Fax: 905.760.8056