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Market leading design
Vertical sliding sash windows are commonly used in heritage and conservation areas, and are a great addition for properties designed with Georgian and Victorian architecture.
At Direct Trade Windows, we use the VS600 system from Smart, delivering the best performance for any property and combining traditional stylings with the advantages of modern thermal technology.
These windows also feature an innovative ‘tilt’ function which allows for effortless cleaning – perfectly suited for high rise buildings.
Our vertical sliding sash windows are:
- Fully customisable – Tailored to complement any style.
- Thermally efficient – Overall U-value of 1.6 W/m²K.
- Safe – Equipped with a ‘tilt’ function, these windows suit high rise buildings.
- Durable – Fully tested to ensure maximum weather resistance.
- Expertly engineered – Featuring a concealed drainage and coupling option.
Trusted manufacturers since 2000
Professional Installer Network
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Made in the UK
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Bespoke Complex Products Fabricated
VS600 Vertical Sliding Sash Windows
The VS600 vertical sliding sash window from Smart can be used in heritage and conservation areas, while its excellent and natural ventilation rates mean that it’s also suited to high rise buildings.
Thanks to a flush opening with no projection into or out of the building, this window is ideal for commercial buildings such as schools or hospitals.
- Innovative ‘tilt’ operation to facilitate external glass cleaning
- Low line glazing gasket that accepts 28mm sealed units
- U-value of 1.6 W/m²K
- Concealed drainage and concealed coupling option
- Optimised fabrication through square cut outer frame
- Maximum width of 1600mm and height of 2800mm
- Maximum weight of 50kg
- 28mm glazing
- 126mm frame depth
Technical Specification
Technical Specification
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
Colours
Colours
White aluminium frame colour finish sample.
Matt white aluminium frame colour finish sample.
Matt brown aluminium frame colour finish sample.
Jet black aluminium frame colour finish sample
Grey aluminium frame colour finish sample.
Gloss white aluminium frame colour finish sample.
Gloss off white aluminium frame colour finish sample.
Dark red aluminium frame colour finish sample.
Dark grey aluminium frame colour finish sample.
Dark green aluminium frame colour finish sample.
Dark brown aluminium frame colour finish sample.
Dark blue aluminium frame colour finish sample.
Cream aluminium frame colour finish sample.
Black aluminium frame colour finish sample.
Anthracite grey aluminium frame colour finish sample.
Airforce grey aluminium frame colour finish sample.
Glass
Glass Options
Unglazed aluminium window frame with angled top.
Standard toughened glass panel with clear finish.
Standard self-clean glass panel with clear finish.
Clear solar control glass panel for improved comfort and energy efficiency.
Self-cleaning glass panel designed to break down dirt and reduce cleaning frequency.
Self Clean Solar Control panel combining dirt-repelling and heat-reducing technology.
Satin obscure glass panel with smooth frosted finish.
Laminated security glass panel with clear finish.
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Vertical Sliding Sash Windows - Your Questions Answered
Get a Free Quote for VS600 Sash WindowsWhat are vertical sliding sash windows?
Vertical sliding sash windows are a classic window style where one or both sashes slide vertically to open. They combine traditional charm with modern performance, making them ideal for heritage properties and contemporary homes alike.
Are vertical sliding sash windows energy-efficient?
Yes. At Direct Trade Windows, our sash windows feature advanced double glazing, weather seals, and thermal breaks to reduce heat loss and improve energy efficiency.
Do modern sash windows require a lot of maintenance?
Not at all. Unlike traditional timber sashes, our aluminium vertical sliding sash windows are low-maintenance, resistant to warping, and easy to clean.
Can sash windows be customised?
Absolutely. We offer bespoke sizes, colours, glazing options, and hardware choices to perfectly suit your property’s style and requirements.
Are they suitable for conservation or listed buildings?
Yes. We design our vertical sliding sash windows to replicate traditional profiles, meeting the requirements of many conservation areas while delivering modern benefits
Do they provide good security?
Definitely. Our sash windows are built with robust aluminium frames and advanced locking mechanisms to provide excellent security for your home or business.
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