Fiberglass Windows & Doors Engineered in Canada
Inline Fiberglass makes premium fiberglass windows, entrance doors, and sliding patio doors for homes, commercial buildings, architectural projects, and high-performance building needs.
A focused fiberglass product line for homeowners, architects, builders, developers, and dealers.
Company Established in
1992
Decades of experience in fiberglass window and door manufacturing.
Toronto Manufacturing Headquarters
Locally based production with hands-on quality control.
Integrated Fiberglass Manufacturing
From pultrusion to painting, design, and final assembly.
Dealer-supported
availability
Product access supported through an established dealer network.
Find the Right Path for
Your Project
Every project starts in a different place. Choose the path that best fits your needs, and Inline will help you move toward the right fiberglass window or door solution.
Windows and Doors Should Perform as Well as They Look
The right window or door does more than fill an opening. It affects comfort, energy performance, appearance, maintenance, and long-term value.
Inline Fiberglass helps customers choose products for projects where performance matters, including home upgrades, custom builds, commercial buildings, and high-performance construction.
For Homeowners
Better comfort, cleaner design, and durable products for everyday.
For architects and Builders
Clear product information and confidence in the right fit.
For commercial teams and dealers
A focused fiberglass line backed by practical product support.
Explore Fiberglass Windows, Doors, and
High-Performance Products
Choose the product path that fits your project. Inline offers fiberglass window and door products for residential, commercial, architectural, and dealer-supported applications.
Fiberglass Windows
Explore fiberglass windows for residential, commercial, and high-performance applications, with styles including casement, awning, fixed, slider, hung, strip, and tilt-and-turn.
Fiberglass Entrance Doors
Create a stronger first impression with fiberglass entrance doors designed for durability, clean style, and long-term performance.
Sliding Patio Doors
Connect indoor and outdoor spaces with fiberglass sliding patio doors designed for comfort, performance, and smooth everyday use.
Passive House & High-Performance
Planning a high-performance or Passive House project? Inline can help you review product options, documentation, and certification details by product.
Why Choose Fiberglass?
Fiberglass is a strong fit for projects where long-term performance, comfort, and durability matter. It supports stable frames, clean design, energy-conscious product options, and lower-maintenance ownership compared with many traditional window and door materials.
Built for Strength
Fiberglass frames are designed for long-term durability and structural performance across residential and commercial applications.
Designed for Comfort
The right fiberglass window or door system can help support thermal comfort, energy performance, and a more efficient building envelope.
Stable and Durable
Fiberglass is valued for dimensional stability, helping window and door frames perform through changing temperatures and seasons.
Clean Design Flexibility
Choose from product styles, glass options, colours, grille options, and hardware details to fit the design of your home or building.
Built Around Fiberglass. Not Added On.
Inline Fiberglass is focused on fiberglass windows and doors. Fiberglass is not one product category among many. It is the material our product line is built around.
That focus helps us provide clearer product guidance, better technical support, and window and door options designed around the strengths of fiberglass.
Inline is built around fiberglass. The company controls key parts of the product process, from pultruded fiberglass lineals to architectural coatings and final window and door assembly. That manufacturing focus helps support product consistency, finish quality, technical performance, and clear product guidance for residential, commercial, and high-performance building projects.
See Fiberglass Windows and Doors in Real Projects
Explore how Inline fiberglass products support residential, commercial, and high-performance building projects.
Residential Projects
See fiberglass windows and doors used in home upgrades, custom homes, and residential building projects.
Commercial Projects
Review project examples for commercial, multifamily, and performance-focused applications.
Passive House
Explore projects where thermal performance, documentation, and technical confidence matter.
A Clear Next Step for Every 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.
01
Tell Us About Your Project
Send a few details about your windows, doors, building type, location, timeline, and product needs.
02
We Review Your Request
Our team reviews your project and recommends the best next step for your needs.
03
Move Forward with Confidence
We help you understand your options so you can move toward the right fiberglass window or door solution.
Need Product Specs, Drawings, or Certification Details?
Inline supports performance-focused projects with product-specific documentation, including NFRC performance data, IGMAC-certified insulating glass units, and select Phius Blue Path certified product configurations. Certification scope varies by product, configuration, and project requirements, so architects, builders, and homeowners should request the right documentation before specifying a product.
Visit the Inline Fiberglass Showroom or Find a Dealer
Inline manufactures its fiberglass window and door products in Ontario and works with authorized dealers to support regional distribution, localized installation, and code-specific project needs. Contact Inline or use the dealer locator to find the right path for your location and project type.
Ready to Start Your Window or Door Project?
Tell us about your project. Our team will review your request and help you take the next step toward the right fiberglass windows, doors, product specs, dealer path, or project support.
We respect your privacy and will only use your details to respond to your 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.
What does Inline Fiberglass make?
Inline Fiberglass makes fiberglass windows, fiberglass entrance doors, sliding patio doors, and high-performance product options for residential, commercial, architectural, and dealer-supported projects.
Why choose fiberglass windows and doors?
Fiberglass is valued for strength, durability, dimensional stability, energy-conscious performance, and clean design flexibility. It is a strong choice for projects where long-term performance matters.
Does Inline work with homeowners?
Yes. Homeowners can contact Inline to ask about fiberglass windows, entrance doors, sliding patio doors, showroom visits, quote requests, and the best path for their project.
Can architects and builders request product specs?
Yes. Architects, builders, developers, and specifiers can request product specs, technical documents, drawings, and project support from Inline.
Are Inline products Passive House or PHIUS certified?
Select Inline product configurations have performance certifications, including Phius Blue Path certified products such as the 400 Series Fixed Window and 600 Series Sliding Door. Certification scope varies by product and configuration. Request product documentation to confirm the right fit for your project.
Does Inline install directly?
Yes, we offer direct installation services through our own experienced installation team. Our turnkey replacement service includes removing your existing windows and installing new fiberglass windows tailored to your home’s needs, ensuring a seamless process from start to finish.
Does Inline offer custom colours?
Yes. Inline offers factory-applied architectural coatings, standard colour options, custom colour matching, dark exterior finishes, and split-finish configurations for select products. Final options may vary by product and project requirements.
Does Inline provide warranty support?
What information is needed for a service request?
Service requests should include the project location, original work order details if available, product line, issue type, facility type, window height where relevant, and photos. This helps the service team review the issue before follow-up.
How do I get a quote?
Use the Request a Quote form and share your project type, location, product needs, and timeline. Inline will review your request and follow up with the next step.
How do I become an Inline dealer?
Submit a dealer inquiry with your market, business details, and product interest. Inline will review your request and contact you about availability and next steps.
Start with the Right Fiberglass Window or Door Path
Whether you are upgrading a home, planning a commercial project, specifying high-performance products, or exploring dealer opportunities, Inline Fiberglass can help you take the next step.