Technical Specifications
Brand VS
Material Aluminium Polyamide
Thermally Broken Yes
NBS Available Yes
WER Rating C
U Value 1.6W/m²K (using correct glass unit)
Document L Compliant Yes
BS 6375-1:2009 Yes
Vertical Sliding Max Width (mm) 1600mm (based on frame height 1300mm)
Vertical Sliding Max Height (mm) 2800mm (based on frame width 750mm)
Vertical Sliding Max Weight (kg) 50kg (per sash)
Glazing (mm) 28mm
Frame Depth (mm) 126mm
Glass Options
All our aluminium sliding sash windows are available with a choice of high-performance glazing to suit your project requirements:
- Double-glazed sealed units — standard specification for thermal efficiency
- Triple-glazed units — enhanced thermal and acoustic performance
- Acoustic laminated glass — for noise reduction in urban and roadside locations
- Solar control glass — reduces heat gain and glare while maintaining natural light
We specify the optimal glass configuration for each project based on thermal performance, acoustic requirements and Building Regulations compliance.
Colours & Finishes
All our aluminium sliding sash windows are powder coated using a Qualicoat-certified process and are available in the full RAL colour palette — over 200 standard colours plus bespoke colour matching for heritage and commercial projects.
Standard Colour Options
- Anthracite Grey (RAL 7016) — the most specified colour across contemporary residential and commercial projects
- Jet Black (RAL 9005) — a bold, architectural choice for steel-look and modern schemes
- Pure White (RAL 9010) — clean, minimal finish for contemporary interiors and white render elevations
- Traffic White (RAL 9016) — brighter white commonly specified for traditional and period properties
- Cream (RAL 9001) — warm off-white suited to stone, brick, and heritage contexts
- Signal Grey (RAL 7004) — a softer grey alternative to Anthracite for urban and coastal projects
Dual Colour Finishes
A different colour can be applied to the internal and external faces of any frame — allowing the exterior to meet planning requirements or match the building's facade while the interior colour coordinates with the internal design scheme.
Dual-colour finishes are a popular choice for windows — anthracite grey or black externally with a clean white internal finish to match your interior.
Anodised Finishes
Anodised aluminium provides a harder, more scratch-resistant surface than powder coat and is available in natural silver, bronze, champagne, and dark grey anodised finishes — commonly specified for commercial projects, high-traffic environments, and where a metallic appearance is required.
Bespoke Colour Matching
RAL and NCS colour matching is available for projects requiring an exact match to an existing material, manufacturer specification, or architect's colour schedule. Samples are available on request prior to order.
