400 Series Strip / Fixed Fiberglass Windows
Fiberglass Fixed Windows for Expansive Glass, Clean Sightlines, and High-Performance Projects
The Fixed Window System for Light-Filled Spaces
Inline Fiberglass 400 Series Strip / Fixed Windows are designed for projects that need large glass areas, slim visual lines, and dependable fiberglass performance.
This fixed window system is a strong fit for modern homes, commercial buildings, architectural glass bands, and high-performance projects where natural light, durability, and thermal performance matter.
Large Glass. Clean Design.
The 400 Series is a fixed fiberglass window system designed for large glass areas, expansive views, and clean architectural sightlines.
Available with double or triple pane glass, it can be combined with operable window styles where ventilation is needed. Standard and custom colour options are available, along with product drawings, technical documentation, and select Phius and Passive House-related resources for qualifying projects.
Best fit for:
- Large fixed openings
- Strip window designs
- Modern façades
- Passive House-oriented projects
- Areas where ventilation is handled elsewhere
Built for Projects Where Fixed Glass Has to Do More
The 400 Series is not a basic picture window. It is an architectural fiberglass fixed window system designed for larger openings, cleaner sightlines, and long-term performance.
Strength and Stability
The rigid fiberglass frame supports larger glass areas with a clean profile.
Energy Performance
Available with double or triple pane glass options to support energy efficiency.
Large-Format Design
Designed for expansive glass areas and modern architectural applications.
Design Flexibility
Can be combined with operable windows where ventilation is required.
Customization
Available in standard colours or custom finishes to suit project needs.
Technical Confidence
Product drawings and specs resources are available for project planning.
Where the 400 Series
Works Best
The 400 Series is a strong option when the window does not need to open, but the design still needs strength, light, thermal performance, and clean aesthetics.
Modern Residential Projects
Use the 400 Series for large fixed windows, feature walls, stairwells, living rooms, and spaces where natural light is a design priority.
Commercial and Architectural Projects
The 400 Series can support commercial and architectural projects where fixed fiberglass windows, larger glass areas, durability, and technical documentation are important.
High-Performance Projects
For projects with strict performance targets, the 400 Series can be reviewed with Inline’s technical team to confirm suitable glass packages, documentation, and configuration details.
Strip Window and Glass Band Designs
Use 400 Series strip windows when the project calls for horizontal or vertical glass bands with a clean architectural look.
Mixed Fixed and Operable Layouts
Fixed windows do not provide ventilation on their own. The 400 Series can be planned alongside operable Inline window systems when the space also needs airflow.
Feature Walls and Statement Spaces
The 400 Series is well suited for spaces where uninterrupted glass and exterior views are a key part of the design.
Customize the 400 Series for Your Project
The 400 Series can be tailored to match the design and performance needs of your project.
01
Glass and Colour Options
Choose from available double or triple pane glass packages along with standard and custom colour options to support both performance and design goals.
02
Grilles and Design Details
Add grille options where the project calls for a traditional, divided-lite, or more detailed architectural appearance.
03
Project-Specific Guidance
Not sure which combination is right? Inline can help review your project needs and guide you toward the right glass, colour, and configuration options.
Why Choose Fiberglass for Fixed Windows
Fixed windows often carry large glass loads and are expected to stay stable for years. Fiberglass is well suited for this role because it is strong, durable, and dimensionally stable.
Inline’s fiberglass fixed windows are designed to support:
- Large glass areas
- Clean frame profiles
- Long-term durability
- Energy-efficient building goals
- Lower maintenance than many traditional frame materials
- Residential and commercial design flexibility
See the 400 Series in Real Spaces
Explore how the 400 Series is used across homes and projects where expansive glass, natural light, and clean architectural design are priorities.
Planning a Project? Get the Technical Details Early.
Architects, builders, and commercial teams often need more than a product overview. They need drawings, product data, glass options, certification details, and confirmation that the selected configuration fits the project.
Inline can help with:
- Product selection
- Fixed vs operable window planning
- Glass package review / Colour and finish options
- Custom sizing guidance
- Technical documents
- Commercial project support
- Passive House / high-performance documentation review
400 Series
Drawings and Installation Resources
Access available 400 Series technical documents to help with product review, specification, and installation.
400 Series Drawings — PDF
Download product drawings to assist with project planning, design review, and development.
400 Series Drawings — CAD
Access CAD drawings to support project design, planning, and specification development.
For project-specific performance data, certification documentation, or glass package confirmation, contact Inline Fiberglass before final specification.
Common Questions About 400 Series Strip / Fixed Windows
Find clear answers to common questions about fiberglass windows, including product options, performance considerations, and how to choose the right solution for your project.
Where is the 400 Series best used?
The 400 Series is best used for large fixed glass areas, strip window designs, modern homes, commercial projects, and high-performance buildings where clean sightlines and strong fiberglass framing are important.
Do 400 Series fixed windows open?
No. Fixed windows do not open. They are designed for light, views, strength, and thermal performance. If the room needs ventilation, the 400 Series can be planned with nearby operable Inline windows.
Can the 400 Series be triple glazed?
Yes, the 400 Series is available with double and triple pane glass options. The best glass package depends on the project goals, performance requirements, and product configuration.
Is the 400 Series Passive House certified?
The 400 Series is PHIUS certified. Certification documentation and performance requirements should still be confirmed with Inline based on the project configuration, glass package, and specification needs.
Can I get custom colours?
Yes. Inline offers standard and custom colour options. Custom colour availability, finish details, and approval requirements should be confirmed during the quote or specification process.
Can the 400 Series be used in commercial projects?
Yes. The 400 Series is well suited to many commercial and architectural projects where fixed fiberglass windows, larger glass areas, and technical documentation are required.
Are drawings available?
Yes. PDF drawings, CAD drawings, and installation documents are available for the 400 Series.
Is this the right window if I want maximum airflow?
No. If ventilation is the main goal, consider an operable Inline window series such as casement, awning, tilt and turn, hopper, slider, single hung, or double hung. The 400 Series is best when fixed glass is the right fit.
Ready to Plan Your 400 Series Window Project?
Tell Inline about your project and the team will help you confirm the right product path, glass package, colour options, and documentation. Whether you are planning a modern home, a commercial project, a Passive House-oriented build, or a large fixed glass opening, the 400 Series gives you a clean fiberglass window option built for long-term performance.
Tell Us About Your Window Project
Our team will review your request and help you confirm the right next step.
We respect your privacy and will only use your details to respond to your request.