Built Around Fiberglass Since 1992
Inline has grown from a Toronto-based manufacturer into a trusted source for fiberglass windows and doors used in residential, commercial, architectural, high-performance, and dealer-supported projects.
Inline Fiberglass began with a focused idea: build better windows and doors by specializing in fiberglass.
Fiberglass is not one product line among many at Inline. It is the material the company is built around.
From its manufacturing facility in Etobicoke, Inline continues to focus on the same practical goal: making fiberglass window and door systems that support long-term performance, comfort, durability, and clean design.
A Canadian Manufacturer With Deep Fiberglass Focus
Inline controls more of the product process than many typical window and door sellers. That includes fiberglass lineals, painting, desInline Fiberglass has spent more than three decades developing products around one core material: fiberglass.
That focus matters. Many window and door companies sell several material types. Inline’s story is different. The company has built its product knowledge, manufacturing process, and technical support around fiberglass windows and doors.
Today, Inline supports a wide range of project needs, including:
- Fiberglass windows for homes and custom builds
- Fiberglass entrance doors and sliding patio doors
- High-performance and Passive House-oriented projects
- Commercial and multi-unit building applications
- Dealer-supported availability across select regions
- Architect, builder, and specifier support
The result is not a generic window company story. It is the story of a manufacturer that stayed focused on one material and continued building around its strengths.
More Than 30 Years of Manufacturing Progress
1992 — A Fiberglass-Focused Manufacturer Begins
Inline Fiberglass was established in Toronto with a clear manufacturing focus: fiberglass windows and doors.
Instead of building around vinyl, aluminum, or wood, Inline centered its product development around pultruded fiberglass because of its strength, dimensional stability, thermal performance, and long-term durability.
Growth Into Residential and Commercial Projects
As demand for stronger, more energy-efficient window and door systems grew, Inline expanded its product range to support more project types.
Homeowners, builders, architects, developers, and commercial buyers began looking for products that could handle more than basic replacement needs. Inline’s fiberglass systems helped support projects where performance, comfort, appearance, and durability all mattered.
Product Line Expansion
Over time, Inline’s product offering grew to include multiple fiberglass window series, entrance doors, sliding patio doors, high-performance products, and design options for glass, colours, grilles, and hardware.
That product breadth allows the company to support many types of buildings without moving away from its core material focus.
Manufacturing Control and Technical Development
Inline’s process has continued to center on manufacturing control. By keeping key parts of the process close to the company, Inline can better manage product quality, consistency, finish options, and technical support.
This matters for homeowners who want confidence in what they are buying. It also matters for architects, builders, and commercial teams that need product information, documentation, and reliable guidance.
Today — Supporting Homes, Buildings, Dealers, and Specifiers
Today, Inline Fiberglass continues to serve homeowners, architects, builders, developers, commercial buyers, and dealers from its Toronto-area manufacturing base.
The company’s story is still rooted in the same idea: stay focused on fiberglass and keep improving how fiberglass windows and doors are made, specified, and supported.
Why Our History Matters to Your Project
Inline’s history is not just about how long the company has been in business. It is about what that experience means for your project.
Better Manufacturing Control
Inline controls more of the product process, including fiberglass production, painting, design, and final assembly. That level of control helps maintain consistency from early selection through to finished window or door production.
Stronger Product Knowledge
By focusing on fiberglass, Inline provides practical guidance across window and door options. That helps homeowners compare, builders plan, and architects request the right technical details with more clarity.
Consistent Finishes and Options
Inline’s manufacturing process supports a wide range of finish options across colours, glass, grilles, and hardware. This helps maintain consistency and coordination across both residential and commercial applications.
For Performance-Focused Projects
Fiberglass is valued for strength, thermal stability, and long-term durability. Inline’s product history supports projects where comfort, energy performance, and material reliability are critical.
Support for Different Buyer Paths
Inline supports different project needs, from homeowner quotes to architectural specifications and builder coordination. The goal is to make each path clearer, more direct, and easier to navigate.
More Predictable Project Outcomes
Inline’s experience and manufacturing control help reduce uncertainty. From product specification to production and final delivery. That means fewer surprises and more confidence.
How Inline Helps Different Customers Build With Confidence
Homeowners, developers, architects, dealers and distributors, every project starts in a different place. Inline will help you choose the right windows and doors to positively impact the comfort, energy performance, durability, and long-term value of your properties.
A Different Approach Built on One Clear Focus
Inline’s story is simple: fiberglass is all we do.
That focus helps the company avoid the common problem of trying to be everything to everyone. Instead, Inline builds its expertise around one material and one category: fiberglass windows and doors.
This gives buyers a clearer reason to trust the product path:
- A focused manufacturer, not a generic supplier
- A product line built around fiberglass performance
- Manufacturing control across important production steps
- Residential and commercial project experience
- Support across all project stakeholders
- Technical documentation and product guidance
The best window or door is not just the one that looks right on day one. It is the one that still supports comfort, performance, and usability years later.
Visit Inline in Etobicoke to start your project with confidence
Inline Fiberglass is headquartered and manufactures from its Toronto-area facility in Etobicoke, Ontario.
Visitors who want to see products, discuss options, or better understand the product line can contact Inline to ask about showroom availability and the best next step for their project.
Common Questions About Inline Fiberglass Windows and Doors
Find clear answers to common questions about fiberglass windows and doors, including product options, performance considerations, and how to choose the right solution for your project.
What is Inline Fiberglass?
Inline Fiberglass is a Canadian fiberglass window and door manufacturer based in Etobicoke / Toronto, Ontario. The company focuses on fiberglass windows, entrance doors, sliding patio doors, and high-performance product applications for residential, commercial, architectural, and dealer-supported projects.
When was Inline Fiberglass founded?
Inline Fiberglass was established in 1992. The company has spent more than 30 years focused on fiberglass window and door manufacturing.
Where are Inline Fiberglass products made?
Inline Fiberglass operates from its manufacturing and corporate headquarters in Etobicoke / Toronto, Ontario. This location supports key manufacturing and business operations.
Is the legal name Inline Fiberglass Ltd. or Inline Fiberglass Inc.?
Source materials reference both Inline Fiberglass Ltd. and Inline Fiberglass Inc. The correct legal entity should be confirmed before publishing legal, footer, warranty, or formal corporate copy.
Does Inline Fiberglass work directly with homeowners?
Inline supports homeowner inquiries, but the correct path may depend on project type, location, dealer availability, and installation needs. Homeowners can start by requesting a quote or contacting Inline for guidance.
Does Inline Fiberglass sell through dealers?
Yes. Inline works with authorized dealers in select regions. Visitors can use the dealer locator or contact Inline to confirm the right sales or support path for their area.
Does Inline install windows and doors?
Installation wording should be confirmed before publishing. In many cases, the right path may involve an authorized dealer, contractor, builder, or project partner. The safest message is: contact Inline to confirm the best next step for your location and project type.
Does Inline support architects and builders?
Yes. Inline supports architects, builders, specifiers, developers, and commercial buyers with product information, technical documents, project guidance, and specification support.
Are all Inline products certified for Passive House projects?
Do not assume that every product has the same certification. Select Inline products may support high-performance or Passive House-oriented projects. Contact Inline to confirm the right product, certification scope, and documentation for your specific project.
Start with the Right Fiberglass Window or Door Path
Whether you are planning a home upgrade, custom build, commercial project, Passive House-oriented design, or dealer inquiry, Inline can help you find the right fiberglass window or door path.