QW-AB4 Astragal Bar – Composite Timber Window Glazing Bar

The QW-AB4 Astragal Bar is a high-performance composite glazing bar from the Qwood range by Quantum Profile Systems. Designed for timber window systems, it is used to create traditional astragal detailing within glazed units while delivering the benefits of modern wood polymer composite (WPC) technology.

Engineered for consistency and durability, the QW-AB4 provides a stable, straight and easy-to-machine alternative to traditional timber astragal bars, making it ideal for both heritage-style and modern timber window designs.

Traditional Appearance with Modern Performance

The QW-AB4 replicates the appearance of classic timber astragal bars used in Georgian and traditional window designs. It allows joiners to achieve authentic detailing without the common issues associated with natural timber, such as knots, twisting, or inconsistent machining quality.

Unlike softwood alternatives, Qwood composite profiles are manufactured to remain consistently straight, helping improve fabrication accuracy and reducing waste during production.

Key Features & Benefits
12mm composite astragal bar profile
Manufactured from durable wood polymer composite (WPC)
Designed for timber window glazing applications
Consistently straight for accurate machining and fitting
No knots, splits, or natural timber defects
Resistant to warping, twisting, swelling, and rot
Smooth, paintable surface finish
Minimal expansion and contraction in service
Reduced sanding, preparation, and finishing time
Suitable for internal and external window systems
Applications

The QW-AB4 Astragal Bar is suitable for a wide range of timber joinery applications, including:

Georgian-style timber windows
Heritage and conservation projects
Timber casement windows
Flush casement window systems
Residential timber window manufacturing
Commercial joinery applications
Factory-finished window systems

It is particularly effective where traditional glazing bar aesthetics are required alongside modern performance standards.

Why Choose Qwood?

Qwood composite profiles are developed specifically for the timber window and door industry, combining the appearance of timber with the reliability of engineered materials.

Key benefits include:

Reduced waste during manufacturing
Improved machining consistency
No timber defects or knot-related issues
Lower preparation and finishing time
Long-term dimensional stability
Compatible with standard woodworking machinery
Reduced risk of distortion or movement over time

Qwood products are widely used by leading UK joinery manufacturers seeking a reliable alternative to traditional timber glazing components.

Technical Information
Product code: QW-AB4
Product type: Astragal glazing bar
Material: Wood polymer composite (WPC)
Finish: Smooth paintable surface
Application: Timber windows and doors
Manufacturer: Quantum Profile Systems

Technical drawings and full range information are available in Qwood standard range documentation.

Samples & Technical Support

Free samples of the QW-AB4 Astragal Bar are available for joiners, manufacturers, and specifiers. Technical support is available for specification guidance, machining advice, and system compatibility.

About Qwood

Qwood is a specialist range of composite glazing beads, bars, and window profiles developed by Quantum Profile Systems for the timber joinery industry. The system is designed to replicate traditional timber detailing while improving durability, stability, and manufacturing efficiency across modern window production.