Fiberglass Windows and Doors Built Around Long-Term Performance

Inline Fiberglass is a Canadian fiberglass window and door manufacturer focused on durable, energy-efficient products for residential, commercial, architectural, and dealer-supported projects.

Since 1992, Inline has focused on one core material: fiberglass.

That focus shapes how our team designs, manufactures, finishes, and supports fiberglass windows, entrance doors, sliding patio doors, and high-performance product solutions.

Whether you are upgrading a home, planning a custom build, specifying a commercial project, or looking for a trusted product line for your dealership, Inline helps you find the right fiberglass window or door path with clear guidance and practical support.

A Focused Fiberglass Window Manufacturer in Canada

Inline is not a general window supplier that treats fiberglass as one product option among many. Fiberglass is the material our company is built around.

That focus matters because fiberglass windows and doors are often chosen for projects where strength, comfort, durability, thermal performance, and clean design all need to work together.

From our Toronto / Etobicoke manufacturing base, Inline supports a wide range of project needs, including:

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.

For Homeowners

Upgrade Your Home with Fiberglass Windows and Doors

Inline helps homeowners understand their fiberglass window and door options, compare product paths, and take the next step toward a quote or showroom visit.

Common needs: comfort, energy efficiency, curb appeal, durability, colour options, service confidence, and help choosing the right product.

For Architects and Specifiers

Specify with Clear Product Information

Inline supports architects and specifiers with product information, performance data, technical documents, and project-specific guidance.

Common needs: specs, drawings, certifications, Passive House / PHIUS applicability, custom sizing, product fit, and technical confidence.

For Builders and Contractors

Build with Reliable Product Solutions

Inline helps builders and contractors source fiberglass windows and doors you can rely on, with consistent quality, clear timelines, and support that keeps projects moving.

Common needs: product reliability, quote support, clear communication, lead-time clarity, customization, and fit-and-finish confidence.

For Developers & Commercial Buyers

Get the Right Product Guidance for Your Project

Inline supports commercial and high-performance projects with fiberglass window and door products backed by documentation, project experience, and technical support.

Common needs: product performance, commercial proof, documentation, project coordination, long-term durability, and risk reduction.

For Dealers & Distributors

High-Performance Fiberglass for Commercial Builds

Inline works with authorized dealers and distributors across select markets. Dealer inquiries should be routed separately from homeowner quote requests.

Common needs: product line strength, sales support, territory availability, technical documents, warranty/service routing, and product availability.

Why Inline Focuses on Fiberglass

Fiberglass is chosen for projects where long-term performance matters.

Compared with common window materials, fiberglass can support:

Strong frame construction

Dimensional stability

Energy-efficient design

Modern clean lines

Durable long-term finishes

Residential & commercial

Inline’s advantage is not just that it sells fiberglass windows and doors. It is that the company focuses its product knowledge, process, and support around fiberglass.

Manufacturing Control That Supports Product Consistency

Inline controls more of the product process than many typical window and door sellers. That includes fiberglass lineals, painting, design, and final assembly.

For customers, that control supports:

Product Depth for Residential, Commercial, and Dealer-Supported Projects

Inline manufactures a broad fiberglass product lineup for different project needs.

Fiberglass Windows

Inline offers several fiberglass window systems, including tilt and turn, casement, awning, fixed, slider, single hung, and double hung options.

Fiberglass Doors

Inline offers fiberglass entrance doors and sliding patio doors for residential, design-focused, and performance-driven projects.

High-Performance Products

For Passive House, PHIUS, or other high-performance building needs, Inline can help visitors identify the right product path and request the correct documentation.

Dealer-Supported Availability

Inline products are available through authorized dealers across select Canadian and U.S. markets. Visitors outside the GTA should use the dealer locator or inquiry path.

A Practical Process for Starting Your Project

Starting with Inline should be simple.

01 Tell Us About Your Project

You do not need to know every product detail before reaching out. Tell us about your project, and our team will help you move in the right direction.

02 We Review the Right Product Path

Inline will help route your request based on whether you are a homeowner, architect, builder, commercial buyer, dealer, or existing customer.

03 You Get the Next Step

Depending on your project, the next step may be a quote, showroom visit, spec package, dealer referral, technical conversation, or service request.

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.

Where are Inline Fiberglass products made?

Inline Fiberglass is headquartered and manufactures from its Toronto / Etobicoke facility at 30 Constellation Court. The company has been operating since 1992 and focuses on pultruded fiberglass window and door products.

Is Inline Fiberglass a Canadian fiberglass window manufacturer?

Yes. Inline Fiberglass is positioned as a Canadian fiberglass window and door manufacturer serving residential, commercial, architectural, high-performance, and dealer-supported project needs.

Does Inline work with homeowners?

Yes. Homeowners can contact Inline to discuss fiberglass windows, entrance doors, sliding patio doors, showroom visits, and quote requests. Depending on the project location, the next step may involve Inline directly or an authorized dealer.

Does Inline install windows and doors?

This should be confirmed by project location. Inline supports product guidance and quote routing, and many markets are served through authorized dealers.

Does Inline work with architects and specifiers?

Yes. Architects and specifiers can request product specs, technical documents, drawings, certification information, and project support for residential, commercial, and high-performance building projects.

Do Inline products support Passive House or PHIUS projects?

Select Inline products may support high-performance or Passive House project needs. Certification scope should always be confirmed by product, series, configuration, and project requirements before publishing or specifying.

Does Inline sell through dealers?

Yes. Inline works with an authorized dealer network in select Canadian and U.S. markets. Visitors can use the dealer locator or contact Inline for dealer-related support.

How do I request a quote?

Use the Request a Quote form and include your project location, product type, timeline, and any plans or photos you have. Inline will review your request and help route you to the right next step.

Ready to Learn Whether Inline Is the Right Fit?

Tell us about your window or door project. Inline will help you understand your options and take the next step toward the right fiberglass windows, doors, product specs, or dealer-supported path.