Aluminum Sliding Sash Windows
Shaanxi SGL Doors&Windows Technology Co., Ltd. is one of the most reliable manufacturers and suppliers of aluminum sliding sash windows in China, also supports customized service. Please feel free to wholesale high quality aluminum sliding sash windows for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Premium Aluminium Vertical Sliding Sash Windows
What Is a Sliding Sash Window?
A sliding sash window - also known as a vertical sliding sash or double hung window - consists of two sashes that slide vertically within a master frame. Unlike horizontal sliding windows, the sashes move up and down, offering controlled ventilation from both top and bottom. This is the classic window design found in Georgian, Victorian, and Edwardian properties across the UK, Ireland, and the eastern United States.
Modern Aluminium, Traditional Operation
SGL's aluminium sliding sash windows preserve the authentic vertical slide operation while replacing heavy timber frames and ropes with precision-engineered aluminium profiles and spiral balance mechanisms. The result is a sash window that:
- Slides smoothly - no sticking, no rattling, no sagging over time
- Never rots or warps - unlike timber sash windows exposed to British weather
- Keeps warmth in - double glazing + thermal break vs original single-glazed sash windows
- Clean from inside - tilt-in function eliminates the need for exterior access
- Draught-free - dual weatherstripping between meeting rails
How It Works - Vertical Sliding Sash Mechanism
Spiral Balance Spring
Precision counterbalance spring inside the sash channel ensures the window stays at any height. No ropes, no weights, no maintenance.
Top & Bottom Sashes
Both sashes slide independently. Ventilate from the top (warm air escape) or bottom (cool air entry) - natural convection cooling.
Tilt-In Cleaning
Each sash tilts inward on concealed hinges for safe interior cleaning. No need to lean outside or remove the sash - ideal for upper floors.
Dual Weatherstripping
Seals at the meeting rail, head, and sill prevent draughts and air leakage - a significant upgrade from traditional timber sash windows.
Key Features
↕️ Authentic Vertical Slide
- True vertical sliding sash operation - not a horizontal slider. Preserves the traditional appearance and ventilation pattern of classic sash windows.
🔄 Tilt-In Cleaning Function
- Both sashes tilt inward for easy cleaning from inside your home. No ladders, no scaffolding, no specialist window cleaners required.
🔇 38dB Sound Insulation
- Double/triple glazing with acoustic options reduces external noise by up to 38dB. Ideal for urban period properties on busy streets.
❄️ Thermal Break (U-1.3)
- PA66 thermal break strip + Low-E double glazing achieves U-values as low as 1.3 W/m²K - a dramatic improvement over original single-glazed sash windows.
🎨 Heritage Colours Available
- Choose from classic white, cream, heritage green, Oxford blue, or any RAL colour. Wood grain foil finish also available for a traditional timber look.
🏗️ Made-to-Measure
- Each sash window is custom-manufactured to your exact opening dimensions. No oversized frames, no filler panels - a perfect fit for non-standard openings.
Suitable For
- 🏛️ Georgian & Victorian Terraces
- 🏠 Edwardian Villas
- 🏗️ New Build Period-Style Homes
- 🏢 Commercial Heritage Buildings
- 🌳 Conservation Areas
- 🪟 Listed Building Replacements
- 🏚️ Renovation & Restoration Projects
- 🇬🇧 UK & Irish Property Market
- 🇺🇸 US Brownstones & Townhouses
Sliding Sash Windows: Material Comparison
Why choose aluminium over traditional materials for sash windows:
| Factor | Timber Sash | uPVC Sash | SGL Aluminium Sash |
|---|---|---|---|
| Lifespan | 20-30 years | 20-30 years | 50+ years |
| Maintenance | Paint every 3-5 years | Low (but discolours) | Zero - wipe clean |
| Frame Thickness | Thick (reduced glass area) | Very thick (bulky) | Slim profile (more glass) |
| U-Value | 5.0 W/m²K (single glazed) | 1.6-2.0 W/m²K | 1.3 W/m²K |
| Rot / Decay | ❌ Prone to rot | ✅ Resists | ✅ Will never rot |
| Recyclable | ✅ Yes (natural) | ❌ Difficult to recycle | ✅ 100% infinitely recyclable |
our aluminum window Application
our factory
Client Visit
FAQ - Sliding Sash Windows
Q: Q1: What are aluminium sliding sash windows?
A: Aluminium sliding sash windows (also known as vertical sliding sash or double hung windows) feature two sashes that slide vertically within the frame. The classic British sash design is recreated in durable aluminium with modern spiral balance mechanisms, thermal break technology, and double glazing.
Q: Q2: Do these windows tilt in for cleaning?
A: Yes. Both the top and bottom sashes can be fitted with a tilt-in mechanism that allows them to hinge inward for safe and easy cleaning from inside your home - no need to lean outside or hire specialists for routine maintenance.
Q: Q3: How do aluminium sash windows compare to uPVC sash windows?
A: Aluminium sash windows are significantly stronger and more durable than uPVC. They offer slimmer frame profiles (better sightlines), a wider range of colours including heritage shades, longer lifespan (50+ years vs 20-30 for uPVC), and are fully recyclable. Aluminium also resists warping and discolouration better than uPVC in extreme temperatures.
Q: Q4: What is the maximum size for a sliding sash window?
A: Our standard maximum sash size is 1800mm (height) × 1200mm (width) per sash. For larger openings, we offer multi-sash configurations and custom engineering. Contact us with your specific dimensions for a feasibility assessment.
Q: Q5: Are sliding sash windows energy-efficient?
A: Yes. Our aluminium sliding sash windows feature a PA66 polyamide thermal break and can achieve U-values as low as 1.3 W/m²K with double glazing. Dual weatherstripping between the sashes eliminates draughts - a common problem with older timber sash windows.
Q: Q6: Can sliding sash windows be used on upper floors?
A: Absolutely. The tilt-in cleaning function is specifically designed for upper-floor applications, allowing safe interior cleaning without ladders. Our sash windows are engineered to meet all relevant building regulations for egress and escape windows on upper floors.
Project Case Studies
We provide one-stop door and window solutions for individual buyers, contractors, renovation companies, and more.
Our address
No. 2 Group, Fumiao Village, Laojun Town, Hantai District, Hanzhong City, Shaanxi Province, China
Phone Number
+86 13335450021
sgl-factory@sgl-doors-windows.com
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Technical Specifications - Sliding Sash Series
| Product Name | Aluminium Sliding Sash Windows |
| Operation Type | Vertical sliding (double hung) |
| Frame Depth | 82mm |
| Profile Thickness | 1.8mm – 2.0mm (6063-T5 alloy) |
| Balance System | Spiral balance spring (Block & tackle optional) |
| Tilt Function | Tilt-in cleaning - both sashes (optional) |
| Max Sash Size | 1800mm (H) × 1200mm (W) per sash |
| Sash Configurations | Single hung / Double hung / Tilt & slide |
| Astragal Bar Options | Integral / Bonded / Georgian bar pattern |
| Glass Configuration | 5+20A+5 Double Glazing / 5+12A+5+12A+5 Triple Glazing |
| Low-E Coating | Soft-coat Low-E (argon gas fill optional) |
| Thermal Transmittance | U-value: 1.3 – 1.7 W/m²K |
| Sound Insulation | ≥ 38dB |
| Water Tightness | Class 7A (EN 12208) |
| Air Permeability | Class 6 (EN 12207) |
| Thermal Break | Polyamide PA66 + 25% Glass Fibre |
| Hardware | Spiral balance spring + concealed friction hinges |
| Colour Options | White, Black, Grey, Cream, Heritage Green, Oxford Blue, RAL custom |
| Finish | Powder coating / Anodized / Wood grain foil |
| Warranty | 10 years |
| Certifications | CE, NFRC, ISO 9001 |
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