An all-aluminum Narrow Line system for increased scale, narrow sightlines, and replication capability.
Narrow Line Tier IV – All-Aluminum XL was engineered by Synergy Group in 2026 as an all-aluminum Narrow Line system with replication capabilities. It was developed for projects requiring increased scale, all-metal construction, and the ability to maintain narrow architectural proportions across contemporary or replication-driven applications.
- Fully all-aluminum Narrow Line system
- Increased opening sizes
- Narrow Line proportions
- Custom and replication SDL layouts
- All-aluminum profile replication capability
- Side-mounted casement availability
Tier IV – All-Aluminum XL brings the Narrow Line aesthetic to an all-metal window system designed for larger-scale applications. Featuring durable aluminum construction, flexible SDL layouts, and replication capabilities, it delivers the clean, narrow profiles associated with the Narrow Line family without requiring a wood interior. Ideal for projects where durability, consistency, and architectural character are priorities, Tier IV – All-Aluminum XL combines traditional design influence with modern performance.
View our Tier III – Heritage XL for projects requiring heritage language with wood-interior/exterior-clad construction instead of all-aluminum construction.
- Developed as a fully all-aluminum Narrow Line system.
- Supports increased opening sizes while maintaining Narrow Line proportions.
- Enables accurate replication of profiles and visual depth in aluminum construction.
- Seamless welded joinery maintained across all sash and frame assemblies.
- Intended for projects requiring an all-aluminum solution with replication capability.
Use Tier IV – All-Aluminum XL where the project requires all-aluminum construction, increased scale, and narrow sightlines with replication capability.
- Contemporary all-aluminum applications.
- All-metal projects under the SynComm brand direction.
- Replication-driven projects where aluminum construction is required.
- Projects requiring custom or putty-style SDL expression in an all-aluminum system.
- Casements that extend down to finished floor level where side-mounted operation is needed.
All-Aluminum Narrow Line Construction
Tier IV – All-Aluminum XL is the all-aluminum Narrow Line option. It is intended for projects where the design direction, durability requirements, or system intent call for all-metal construction rather than a wood interior with exterior cladding.
Replication Capability in Aluminum
Tier IV – All-Aluminum XL supports custom and replication SDL layouts. The system can be used to replicate profile depth and traditional visual character while maintaining an all-aluminum construction approach.
Increased Scale with Narrow Line Proportions
The system supports increased opening sizes while maintaining the narrow architectural proportions associated with the Narrow Line family.
Tier IV – All-Aluminum XL is available as a side-mounted casement configuration for all-aluminum casements that extend down to finished floor level. This supports practical operation while maintaining tall, clean all-aluminum casement proportions.
Technical Summary
|
Tier name |
Narrow Line Tier IV – All-Aluminum XL |
|
Engineered |
2026 |
|
Construction |
All-aluminum welded frame and sash assemblies |
|
Glazing |
Dual-insulated glazing; triple-insulated glazing; laminated glass |
|
Configurations |
Casement and awning |
|
SDL capability |
Custom and replication SDL layouts; putty SDL style available |
|
Side-mounted casement |
Available |
|
All-aluminum |
Yes |
|
Best suited for |
All-aluminum applications, increased scale, narrow sightlines, replication capability, and all-metal project requirements |
Contact Synergy Group to review whether Narrow Line Tier IV – All-Aluminum XL is the right all-aluminum system for your project requirements.