Product imagery for illustration; exact specification subject to manufacturer confirmation.
Horizontal Sliding Secondary Glazing
A practical internal glazing option for wider window openings where panels slide sideways.
- Useful for many wide window layouts
- Sliding access to the primary window
- Multiple panel arrangements may be possible
Supply-only options across the UK · Delivery £50 + VAT (£60) per order
Simple to explore. Made for your windows.
Compare the benefits, check practical suitability and request a made-to-measure quotation.
Opening style
Panels move sideways on tracks; the exact panel arrangement depends on the opening and manufacturer specification.
Comfort
Secondary glazing can help improve thermal comfort and reduce unwanted external noise when appropriately specified and installed.
Original windows
An internal glazing option that can help retain existing window frames and their character.
Specifications, measuring and advice
Everything you need to review before requesting a quotation.
Measuring and installation suitability
Confirm panel divisions, track position, opening clearance and cleaning access.
Measure width and height in three positions and check diagonals, obstructions and fixing surfaces. Final manufacturing dimensions, deductions and fixing requirements must be confirmed against the manufacturer's guidance before ordering.
Glass, frame colours and product options
Glazing, frame finish, hardware, dimensions and fixing arrangements depend on the manufacturer's current range and the individual opening. Availability is confirmed as part of your quotation.
Detailed product information and FAQs
Horizontal Sliding
Our horizontal sliding system is engineered for flexibility across a wide range of commercial window configurations, delivering slim sightlines, smooth operation, and reliable long-term performance.
Configured with 2, 3, 4, or 5 independently sliding sashes, the system provides generous access for cleaning and maintenance, and controlled ventilation, while maintaining a discreet appearance.
For larger or more demanding openings, our Enhanced range offers the same core benefits, with heavy-duty framing and self-supporting panes that ensure stability and strength across larger glass units.
Can be coupled or stacked with other units in the range to cover large glazing areas or long runs of windows. 49dB (Rw), when using 6mm toughened primary glazing and 6.8mm acoustic laminate secondary glazing. 1.5 W/m²K when using 4mm toughened Low E glazing and 80mm spacing between the primary and secondary window. Note: all sizes are for guidance only, and depend on several factors (including glass and subframe). Units and styles outside of those listed are sometimes possible – please contact us for advice. Our manufacturer's Sheffield-based has its own painting plant, allowing you to choose from a comprehensive palette of more than 200 powder-coated RAL colours to achieve a precise match with your Granada secondary glazing system. Suitable for new developments, heritage buildings, and complex commercial environments, our finishes are specified to meet the requirements of each project.
Flexible Coverage
Optimum Noise Reduction
Optimum U Value
Product Range Glass Options Max. Window Size (Including 16mm Timber)
HS2HS3 HS4 Width (mm) Height (mm) Area (m²) Width (mm) Height (mm) Area (m²) Width (mm) Height (mm) Area (m²) Classic 4.0mm tough 2534 1968 3.0 3762 1968 4.5 4934 1968 6.0 Enhanced 6.0mm tough 4934 2068 10.2 4934 2068 10.2 4934 2068 10.2 Enhanced 6.4mm Laminate 4934 2068 10.0 4934 2068 10.2 4934 2068 10.2 Enhanced 6.8mm Laminate 4934 2068 9.4 4934 2068 10.2 4934 2068 10.2 Enhanced 8.8mm Laminate 4934 2768 7.3 4934 2768 10.9 4934 2768 13.7 Enhanced 10.8mm Laminate 4934 2768 5.9 4934 2768 8.9 4934 2768 11.9 Product Range Glass Options Maximum Window Dimensions by Window Type HS5 Installation Options Width (mm) Height (mm) Area (m²) Face Fix
Through TimberReveal
Fix Through FrameReveal
Fix Through TimberOptional Deep
Reveal Fix Through TimberBevels Specials Classic 4.0mm tough 4934 1968 7.5 TIM-43×16 TIM-43×16 TIM-62×16 TIM-70×16 TIM-62×50 TIM-90×90 Enhanced 6.0mm tough 4934 2068 10.2 TIM-43×16 TIM-43×16 TIM-62×16 TIM-70×16 TIM-62×50 TIM-90×90 Enhanced 6.4mm Laminate 4934 2068 10.2 TIM-43×16 TIM-43×16 TIM-62×16 TIM-70×16 TIM-62×50 TIM-90×90 Enhanced 6.8mm Laminate 4934 2068 10.2 TIM-43×16 TIM-43×16 TIM-62×16 TIM-70×16 TIM-62×50 TIM-90×90 Enhanced 8.8mm Laminate 4934 2768 13.7 TIM-43×16 TIM-43×16 TIM-62×16 TIM-70×16 TIM-62×50 TIM-90×90 Enhanced 10.8mm Laminate 4934 2768 13.7 TIM-43×16 TIM-43×16 TIM-62×16 TIM-70×16 TIM-62×50 TIM-90×90
Get a quotation for horizontal sliding secondary glazing
Choose your window dimensions and preferred specification in our online configurator. Unverified configurations require an individual quote.