Fiberglass Window and Door Products Built for Lasting Performance
Find the right path for your project, whether you are replacing windows, planning a custom build, specifying a high-performance envelope, or sourcing durable fiberglass products for your customers.
Fiberglass Windows
Explore fiberglass window systems for modern homes, custom builds, commercial projects, and high-performance buildings. Inline offers multiple window series to support different operating styles, design goals, ventilation needs, and project requirements.
Best for:
Replacement windows, custom homes, large glass areas, commercial projects, energy-efficient upgrades, and performance-focused designs.
- 300 Series Tilt & Turn Windows
- 325 Series Casement, Awning, and Fixed Windows
- 400 Series Strip / Fixed Windows
- 700 Series Casement / Hopper Windows
- 800 Series Horizontal Slider Windows
- 850 Series Single Hung Windows
- 900 Series Double Hung Windows
Fiberglass Doors
Inline fiberglass doors are designed for projects where durability, design flexibility, and long-term performance matter. Choose from entrance door options and sliding patio doors built for residential, architectural, and performance-focused applications.
Best for:
Front entries, patio openings, modern renovations, large glass openings, and energy-efficient door upgrades.
- 4500 Series Entrance Doors
- 600 Series Sliding Patio Doors
Passive House
& High-Performance Products
For architects, builders, developers, and performance-focused homeowners, Inline offers product options designed for demanding building envelope needs.
PHIUS-certified products include 325 Series CSM/AWN/FXD, 400 Series, and 3000 Series TNT/FXD. PHI certification applies to the 3000 Series TNT/FXD. NFRC and AAMA apply to all products, and all products use IGMAC-certified glass units. Energy Star applies based on glazing configuration.
Best for:
High-performance homes, Passive House projects, commercial specifications, low-energy building designs, and projects requiring product documentation.
Product Options & Support
Inline products can be selected with different glass packages, colours, grilles, hardware, and finish options depending on the product series and project requirements.
Best for:
Design-driven homeowners, architects, builders, and project teams that need help matching product performance with aesthetics.
Find the Right Product Series
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
300 Series Tilt & Turn Windows
European-style tilt and turn windows designed for flexible ventilation, secure inward operation, and high-performance applications.
Good fit for:
Modern homes, high-performance buildings, projects needing inward operation, and designs where ventilation flexibility matters.
WINDOWS
325 Series Casement Windows
Heavy-duty fiberglass window systems available in casement, awning, and fixed configurations for residential and commercial applications.
Good fit for:
Homes, custom builds, commercial projects, ventilation-focused spaces, and projects requiring strong weather performance.
WINDOWS
325 Series Awning Windows
Heavy-duty fiberglass window systems available in casement, awning, and fixed configurations for residential and commercial applications.
Good fit for:
Homes, custom builds, commercial projects, ventilation-focused spaces, and projects requiring strong weather performance.
WINDOWS
325 Series Fixed Windows
Heavy-duty fiberglass window systems available in casement, awning, and fixed configurations for residential and commercial applications.
Good fit for:
Homes, custom builds, commercial projects, ventilation-focused spaces, and projects requiring strong weather performance.
WINDOWS
400 Series Strip / Fixed Windows
Fixed and strip window systems designed for clean architectural lines, larger glass areas, and commercial or contemporary design applications.
Good fit for:
Large glass openings, modern architecture, commercial projects, and high-performance fixed window applications.
WINDOWS
700 Series Casement / Hopper Windows
In-swing casement, hopper, and fixed options designed for projects where inward operation, safety, maintenance access, or specific building conditions matter.
Good fit for:
Urban projects, multi-storey buildings, commercial applications, and spaces where outward-opening windows may not be suitable.
WINDOWS
800 Series Horizontal Slider Windows
Fiberglass horizontal slider windows designed for smooth operation, durability, and practical ventilation in spaces where sliding function is preferred.
Good fit for:
Residential projects, space-conscious layouts, wide openings, and rooms where outward operation is not ideal.
WINDOWS
850 Series Single Hung Windows
Single hung fiberglass windows with a traditional look and space-saving vertical operation.
Good fit for:
Traditional home styles, bedrooms, narrow exterior spaces, and projects where a fixed upper sash and operable lower sash are preferred.
WINDOWS
900 Series Double Hung Windows
Double hung fiberglass windows with two operable sashes for flexible ventilation and convenient interior cleaning.
Good fit for:
Traditional homes, renovation projects, bedrooms, living spaces, and projects where classic style and ventilation control are important.
Doors
4500 Series Entrance Doors
Fiberglass entrance doors designed for durability, design flexibility, curb appeal, and long-term performance.
Good fit for:
Front entries, custom homes, renovations, sidelites, transoms, and design-focused door upgrades.
Doors
600 Series Sliding Patio Doors
Fiberglass sliding patio doors designed for large openings, smooth operation, thermal performance, and indoor-outdoor connection.
Good fit for:
Patios, terraces, large glass openings, modern homes, commercial projects, and high-performance applications.
Product Confidence Backed by Fiberglass Focus
Inline is not a generic window and door supplier. The company is built around fiberglass products and supports a range of residential, commercial, architectural, and dealer-supported project needs.
Inline product pages should help visitors confirm:
- Which window or door style fits their project
- Which product series matches their design and performance goals
- What glass, colour, grille, and hardware options are available
- Which technical documents or product specs are needed
- Which documents apply to a specific product
- Whether the next step should be a quote, spec request, showroom visit, or dealer inquiry
Not Sure Which Product
You Need?
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.
How to Choose the Right Inline Product
Every project has different design, performance, and functional requirements. Start by identifying the priorities that matter most to your application.
Choose by Operating Style
If you want flexible ventilation and everyday functionality, start with tilt and turn, casement, awning, hopper, slider, single hung, or double hung options.
Choose by Design Goal
If you want large glass areas, expansive views, or clean architectural lines, fixed and strip window options may be the right place to start.
Choose by Project Type
For residential projects, explore windows and doors. For commercial or high-performance projects, review technical documents and Passive House products.
Choose by Performance Need
If energy performance or certification requirements are important to your project, Inline can help identify the product best suited to your goals.
Choose by Customization
If colour, grille style, glass package, or hardware is important, review the product options page or speak with Inline’s team for guidance.
Choose by Architectural Style
Whether your project is traditional, transitional, or contemporary, different window and door styles can help achieve the look you want.
Common Questions About Inline Fiberglass Products
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 products does Inline Fiberglass make?
Inline Fiberglass makes fiberglass window systems, fiberglass entrance doors, sliding patio doors, and high-performance product options for residential, commercial, architectural, and dealer-supported projects.
Which fiberglass window series is right for my project?
It depends on how the window needs to operate, where it will be installed, the design style, glass requirements, and performance goals. Tilt and turn, casement, awning, fixed, slider, single hung, and double hung options each serve different needs.
Does Inline offer fiberglass doors?
Yes. Inline offers fiberglass entrance doors and sliding patio doors. These products are designed for durability, energy performance, and design flexibility across different project types.
Are Inline products energy efficient?
Inline fiberglass windows and doors are designed with energy performance in mind. Exact performance depends on the product series, glass package, size, and configuration. Contact Inline to confirm the right product data for your project.
Are all Inline products Passive House or PHIUS certified?
Certification scope varies by product and configuration. PHIUS applies to 325 Series CSM/AWN/FXD, 400 Series, and 3000 Series TNT/FXD. PHI applies to 3000 Series TNT/FXD. NFRC and AAMA apply to all products, and all products use IGMAC-certified glass units. Energy Star depends on glazing configuration. Inline can help confirm the right documentation for your project.
Can I customize colours, glass, grilles, or hardware?
Product options may include different glass packages, colours, grilles, finishes, and hardware depending on the series and configuration. The best next step is to review the options page or ask Inline for product-specific guidance.
What should I prepare before requesting a quote?
Helpful details include your project location, product type, rough sizes if available, timeline, photos or plans, and whether you are a homeowner, architect, builder, developer, dealer, or other project contact.
Does Inline install directly?
Yes. Inline has its own installers and offers turnkey replacement service for direct projects, including removal of existing windows and installation of new products. Dealer-supported or regional projects may follow a different path, so contact Inline to confirm the right process for your location.
Ready to Find the right Fiberglass Product?
Tell Inline about your project and the we’ll help you take the next step. Whether you need windows, entrance doors, sliding patio doors, product specs, or commercial project support, start with the product path that fits your needs.