Balanced Vertical Sliding
Vertical sliding secondary glazing works with traditional sash windows while retaining the character of the original frame. Slim aluminium units sit within the window reveal, with spring-balanced panes that can be held at the required position for ventilation.
Options include tilt-in panels for easier cleaning and a slide-past arrangement for greater access to the original window.
Key features
| Versatile design | Suitable for arched and other shaped applications, including complex window geometries. |
|---|---|
| Acoustic performance | Up to 49 dB (Rw) in the specified test configuration using 6 mm toughened primary glazing and 6.8 mm acoustic laminated secondary glazing. |
| Thermal performance | U-value of 1.5 W/m²K in the specified configuration using 4 mm toughened Low-E glazing with an 80 mm cavity. |
| Ease of access | Spring-balanced sliding panes, with tilt-in and slide-past configurations available. |
Sizes
Dimensions are guidance only and depend on glass specification, subframe and installation details. Please ask us to confirm suitability.
| Style | Description | Max Width | Max Height | Max Weight |
|---|---|---|---|---|
| BVS | Balanced vertical slider | 1,575mm | 3,325mm | 45KG |
| TBVS | Tilt-in balanced vertical slider | 1,568mm | 3,025mm | 45KG |
| SPBVS | Slide Past Balanced Vertical Slider | 1,575mm | 3,325mm | 45KG |
Frame colours
A wide choice of powder-coated RAL finishes is available, including options suitable for traditional and listed properties. Ask us for the current colour samples and finish options.
Glass options
The manufacturer technical table below sets out glazing options and panel limits for the balanced vertical slider (BVS).
| Product Range | Glass Options | Max. Panel Weight (kgs) |
Min. Panel Weight (kgs) |
Min. Upper Panel Size (mm) |
Min. Lower Panel Size (mm) |
Max. Panel Size (mm) |
Max. Panel | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Width | Height | Width | Height | Width | Height | Area m² Must not Exceed |
Aspect Ratios Max Width to Height Ratio |
||||
| Classic | 4.0mm tough | 15 | 2 | 175 | 240 | 175 | 175 | 1500 | 1800 | 1.5 | 1.5 : 1 |
| Enhanced | 6.0mm tough | 45 | 2 | 175 | 240 | 175 | 175 | 1500 | 1800 | 2.7 | 1.5 : 1 |
| Enhanced | 6.4mm Laminate | 45 | 2 | 175 | 240 | 175 | 175 | 1500 | 1800 | 2.7 | 1.5 : 1 |
| Enhanced | 6.8mm Laminate | 45 | 2 | 175 | 240 | 175 | 175 | 1500 | 1800 | 2.6 | 1.5 : 1 |
| Enhanced | 8.8mm Laminate | 45 | 2 | 175 | 240 | 175 | 175 | 1500 | 1800 | 2.0 | 1.5 : 1 |
| Enhanced | 10.8mm Laminate | 45 | 2 | 175 | 240 | 175 | 175 | 1500 | 1800 | 1.7 | 1.5 : 1 |
Installation options
Face-fix and reveal-fix arrangements are available. The table below lists the original manufacturer fitting configurations and maximum dimensions.
| Product Range | Glass Options | Max. Window Size (Including 16mm Timber) |
Installation Options | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Width (mm) | Height (mm) | Area (m²) | Face Fix Through Timber |
Reveal Fix Through Frame |
Reveal Fix Through Timber |
Optional Deep Reveal Fix Through Timber |
Bevels | Specials | ||
| Classic | 4.0mm tough | 1575 | 3025 | 3.0 | TIM-43×16 | TIM-43×16 | TIM-62×16 | TIM-70×16 | TIM-62×50 | TIM-90×90 |
| Enhanced | 6.0mm tough | 1575 | 3325 | 6.0 | TIM-43×16 | TIM-43×16 | TIM-62×16 | TIM-70×16 | TIM-62×50 | TIM-90×90 |
| Enhanced | 6.4mm Laminate | 1575 | 3325 | 5.6 | TIM-43×16 | TIM-43×16 | TIM-62×16 | TIM-70×16 | TIM-62×50 | TIM-90×90 |
| Enhanced | 6.8mm Laminate | 1575 | 3325 | 5.3 | TIM-43×16 | TIM-43×16 | TIM-62×16 | TIM-70×16 | TIM-62×50 | TIM-90×90 |
| Enhanced | 8.8mm Laminate | 1575 | 3325 | 4.1 | TIM-43×16 | TIM-43×16 | TIM-62×16 | TIM-70×16 | TIM-62×50 | TIM-90×90 |
| Enhanced | 10.8mm Laminate | 1575 | 3325 | 3.3 | TIM-43×16 | TIM-43×16 | TIM-62×16 | TIM-70×16 | TIM-62×50 | TIM-90×90 |