Design Options
Duplex and back-to-back systems can be tailored to suit your property style:
Square or rectangular Georgian layouts
Custom bar spacing to match existing windows
Colour-matched frames and bars
Suitable for casement, sash, and door glazing panels
Key Features
True multi-pane visual effect
Internal and external bar alignment for realistic depth
Suitable for uPVC and aluminium windows and doors
Available in a range of grid patterns and bar widths
Compatible with clear and obscure glass options
Durable, low-maintenance construction
Benefits
Premium, authentic traditional appearance
Ideal for heritage and conservation-style properties
Enhances kerb appeal and architectural detail
Maintains full modern thermal efficiency and security
Long-lasting and weather-resistant with minimal maintenance
Where They Are Used
These systems are commonly specified for:
Period property replacements
Heritage-style renovationsBack-to-back bars take the design further by ensuring the internal and external bar layouts are perfectly matched. This creates:
A consistent grid pattern viewed from both sides
Greater visual depth and authenticity
A more heritage-accurate finish for period-style properties
Feature front elevationsBack-to-Back Bar SystemsBack-to-Back Bar SystemsBack-to-Back Bar Systems
Sash and vertical sliding windows
Front and back door glazing panels
What Are Duplex Bars?
Duplex bars are designed to enhance the visual depth of glazing by:
Incorporating internal bars within the sealed glass unit
Adding external surface-applied bars on the glass face
Aligning both layers to create a precise, traditional multi-pane layout
This method delivers a far more realistic appearance than flat internal bar systems.
Features & Benefits
Authentic appearance – Replicates traditional multi-pane glazing with real depth
Enhanced visual detail – External bars align with internal spacer bars for a realistic finish
Energy efficient – Maintains the thermal performance of sealed double glazed units
Customisable designs – Available in a range of layouts, colours, and bar widths
Durable finish – Designed for long-lasting performance in both residential and commercial settings
How It Works
Back-to-back bar systems use a combination of an internal spacer bar within the sealed double glazed unit and matching external bars applied to both sides of the glass. The internal bar sits between the panes, dividing the unit visually, while the external bars are carefully aligned on the outside surfaces to match this layout exactly.
This precise alignment creates depth and shadow lines, giving the appearance of individually glazed panes rather than a single sealed unit. The result is a far more authentic, traditional look compared to standard internal bar systems, while still benefiting from modern insulation, strength, and energy efficiency.
Because the bars are fixed both internally and externally, the overall effect is more detailed and visually accurate, making it an ideal choice for heritage-style properties or projects where a classic finish is required
Looking for a more traditional finish with modern performance?
Contact us today to discuss back-to-back bar systems and find the right design for your project.
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