
What are aluminium sash windows?
Aluminium sash windows seamlessly blend classic charm with contemporary functionality in modern architecture. These windows, characterized by vertical sliding panels, honour tradition while integrating advanced materials for energy efficiency. With sleek lines and customizable designs, they bridge historical aesthetics and present-day needs, making them a defining feature that marries the past with the future in architectural design.
It’s important to choose the right window system for energy efficiency, aesthetics, and functionality. Here at Colin’s Sash Windows we offer 2 types; the UK’s best selling aluminium sash window – Smart Systems VS 600. We also have another range with more budget friendly prices and possibly the lowest price in the UK. Please ask us for a quote
Smart Systems VS 600 Overview
- Melds classic style with modern functionality in aluminium sash windows.
- Crafted by Smart Systems, a leader in architectural solutions.
- Slim sightlines and refined profiles for timeless sash window aesthetics.
Energy Efficiency:
- Incorporates thermal breaks and high-performance glazing.
- Prevents heat loss, enhancing sustainability and potential cost savings.
Security:
- Multi-point locking system and toughened glass options.
- Ensures robust security against intrusions.
Customization:
- Wide range of colours, finishes, and hardware choices.
- Tailored to match individual preferences and architectural themes.
- A pinnacle of traditional elegance and modern engineering.
- Reflects Smart Systems’ commitment to quality, innovation, and sustainability.
Benefits of Smart Systems VS 600 aluminium sash windows
Material Advantages:
- Crafted from durable and lightweight aluminium.
- Strength, corrosion resistance, and minimal maintenance.
- Modern twist on classic timber sash windows.
- Slim sightlines, contemporary thermal efficiency, and enhanced security.
Thermal Excellence:
- Advanced thermal insulation design.
- Double or triple glazing options available.
- Low-emissivity (low-E) coatings and thermal breaks.
- Minimizes heat loss, boosts energy efficiency.
Enhanced Security:
- Equipped with multi-point locking systems.
- Options for toughened or laminated glass.
- Addressing historical vulnerabilities of sash windows.
Design Flexibility:
- High degree of customization with colours, finishes, and designs.
- Tailored appearance to complement any architectural style.
Low Maintenance Solution:
- Resistant to weathering, rot, and pests.
- Contrast with traditional timber windows‘ high maintenance needs.
Blend of Heritage and Modernity:
- Available in both traditional and contemporary styles.
- Seamlessly combines historical aesthetics and modern features.
- Adaptable to diverse architectural contexts.
Balancing Cost and Value:
- They are more expensive than uPVC sash windows (Check prices instantly with our aluminium windows price calculator)
- Long-term durability and energy efficiency offset initial investment.
- Considered investment in the property’s aesthetics and performance.

Reasons to Choose Aluminium Sliding Sash Windows?
✔ Authentic Design with Modern Performance
Our aluminium vertical sash windows feature slim sightlines complemented by traditional detailing, including true-divided glazing bars for a classic appearance, period-style hardware options in chrome, brass, or black finishes, and custom rail proportions designed to align with heritage properties.
✔ Exceptional Thermal Efficiency
Our thermally broken frames offer exceptional thermal efficiency, featuring U-values as low as 1.2 W/m²K and A-rated energy performance to help reduce heating costs. They are compatible with both double and triple glazing options.
✔ Built to Last with Minimal Maintenance
Our aluminium sash windows are built to last with minimal maintenance, featuring high-quality powder coating that resists peeling, flaking, and corrosion, making them ideal for coastal areas. Optional tilt-in sashes facilitate easy cleaning by allowing the sashes to tilt inward.
✔ Smooth Operation & Enhanced Security
Our aluminium sash windows are designed for effortless operation and enhanced security. They feature a heavy-duty spiral balance system, ensuring smooth sliding functionality. Standard multi-point locking mechanisms provide robust security, with options available that are Secured by Design certified, meeting rigorous safety standards.
✔ Fully Customisable
Our aluminium sash windows are available in any RAL colour or woodgrain effect, allowing you to tailor them to your home’s aesthetic. We offer made-to-measure sizing to suit both period and modern properties, ensuring a perfect fit and enhancing your home’s character.
Bespoke Aluminium Sash Windows
Every home deserves windows that match its character and charm. That’s why our aluminium sliding windows are made to measure, tailored precisely to your needs. We’re committed to delivering quality you can rely on.
Manufactured right here in our UK-based facilities, we maintain full control over every stage of production. This means you benefit from outstanding craftsmanship, dependable lead times, and competitive pricing, all without compromising on quality.
With over 200 colours to choose from and a wide selection of finishes, you’re sure to find the perfect look. If you prefer a traditional style? Our woodgrain-effect finishes offer the timeless appearance of timber, without the maintenance. For a more modern feel, our powder-coated options provide a clean, contemporary edge.
Whatever your vision, we’re here to help you create beautiful, practical double glazed windows – from classic sash to elegant casement styles. Designed for British homes and built to last
The Smart Systems VS 600 embodies the best of modern technology and traditional design. Its aluminium construction provides durability, thermal efficiency, and security, while offering design versatility and low maintenance. With options to suit both heritage and modern architecture, it stands as a valuable choice that delivers lasting benefits.
Contact us today to get a quote and order with confidence from Colin’s Sash Windows with the best after sales service in the window business!












