Door Width Measurement
Measure brick-to-brick at three points: top, middle, and bottom of the opening. Use the smallest measurement. Deduct 10mm from this measurement.
Trade supply aluminium sash windows for installers, builders, glazing companies and property professionals who need reliable manufacturer-direct supply, clear specifications and fast turnaround.
Our aluminium sash windows are made as vertical sliding sash windows, making them ideal for traditional replacements, period-style projects, new-build openings and renovation work where a classic sash appearance is required with the strength and performance of modern aluminium.
Standard specification delivery
Vertical sliding sash system
Sash window styles online
Starting trade price
Want to check the quality before specifying windows for a project? You can view our VS 600 aluminium sash window range fully installed at our Brentwood, Loughton, Romford and Epsom showrooms.
Order online, configure your sash window style, or call 0203 835 2007 for trade specification support.
Complete the form to receive a tailored aluminium sash window quote. Our trade team will respond with full specification, pricing and lead time details.
Fill in your project details below and we will be in touch.
6 Day Doors manufactures and supplies aluminium sash windows for the fenestration trade, glazing installers, builders, construction professionals and property companies.
Our supply-only aluminium sash windows are built for projects where appearance, performance and reliability all matter.
This makes the range suitable for:
Every order is securely packaged for delivery and supplied with fitting instructions to support a smoother installation on site.
Our aluminium sash windows are manufactured using the VS 600 system, a vertical sliding sash window system designed to combine classic sash styling with modern aluminium performance.
This makes the range suitable for both contemporary and traditional projects. You can specify a cleaner modern sash window design, or create a more heritage-style appearance with sash horns, astragal bars or Georgian bar detailing where required.
Key options include:
If you are unsure which options suit the project, send the details and we will confirm the most practical specification before the order goes into manufacture.
To quote aluminium sash windows accurately, confirm the core details before ordering.
QUOTE DETAIL
WHAT TO CONFIRM
WHY IT MATTERS
Window size
Overall width and height, plus whether the opening is finished or still being built
Prevents wrong sizes and manufacturing delays
Style
Contemporary sash, period-style sash, sash horns or glazing bars
Affects appearance, price and suitability for the property
Configuration
Single sash window, multiple windows or bay arrangement
Impacts price, delivery and installation planning
Colour
Standard colour, specialist colour or dual colour
Can affect cost and lead time
Glazing
Clear, obscure, decorative or performance glass
Affects price, privacy, performance and compliance
Hardware
Fitch catches, pull handles, restrictors and finishes
Impacts appearance, operation and customer approval
Ventilation
Whether trickle vents are required
Important for Building Regulations and project specification
Cleaning access
Whether tilt-in facility is required
Useful for upper floors and maintenance access
Delivery postcode
Site or business delivery address
Helps confirm delivery cost and timing
For the fastest quote, send the window sizes, style, colour, glazing, hardware requirements, trickle vent requirements and delivery postcode.
Speed matters when you are working to a site schedule. Delayed windows can hold up fitting dates, other trades and customer handovers.
That is why 6 Day Doors offers 6-day delivery on standard specification aluminium sash windows, helping trade customers keep projects moving and avoid unnecessary delays.
Special colours, complex specifications, unusual sizes, glazing bar layouts, bay configurations or large project quantities may affect lead time, so these should be confirmed at quote stage.
Aluminium sash windows are often chosen by trade customers who want the look of a traditional sash window with the strength, stability and durability of aluminium.
WINDOW TYPE
BEST SUITED TO
TRADE CONSIDERATION
Aluminium sash windows
Premium replacements, heritage-style projects, new builds and renovations
Strong, slim, stable and durable with modern performance
uPVC sash windows
Budget-conscious replacement projects
Lower upfront cost, but usually less premium in appearance
Timber sash windows
Conservation-style or traditional projects
Classic appearance, but can require more maintenance
Aluminium casement windows
Modern projects where sash styling is not required
More contemporary opening style and often simpler specification
For installers, aluminium can be a practical option because it offers strong frame stability, clean sightlines and long-term durability.
On site this means:
It is especially useful where the customer wants a traditional sash appearance without the ongoing maintenance associated with timber.
Specifying other window styles on the same project? Browse the full range or compare against our uPVC vertical sliders.
The full aluminium window range.
Contemporary aluminium casements.
Flush-fitting traditional styling.
Everything we supply to trade.
Trade customers choose 6 Day Doors because we understand what matters on live projects: clear specifications, competitive pricing, fast delivery and support before the order goes into manufacture.
You get:
Our goal is to make sourcing aluminium sash windows faster, easier and more reliable for the trade. Contact us if you need help specifying a project.
They are aluminium sash windows made as vertical sliding sash windows. “Aluminium sash windows” is the common search term, while “vertical sliding windows” describes the opening style and mechanism.
Yes. We manufacture and supply aluminium sash windows for installers, builders, glazing companies, construction professionals and property companies.
We offer 6-day delivery on standard specification aluminium sash windows. Special colours, complex specifications, bay windows or large project quantities may affect lead time.
Our aluminium sash windows are manufactured using the VS 600 vertical sliding sash window system.
Yes. The windows can be specified in a more traditional style with options such as sash horns, astragal bars and Georgian bars, making them suitable for period-style replacements and heritage-inspired projects.
For a faster quote, provide the window sizes, style, colour, glazing requirement, hardware choices, trickle vent requirements, any glazing bar details and the delivery postcode.
Aluminium sash windows offer strong frame stability, durability and lower maintenance compared with timber. Timber may still be preferred for some traditional or conservation projects, but aluminium is often a practical trade choice where longevity and reduced maintenance matter.
Yes. Each window order is supplied with fitting instructions and is securely packaged for delivery.
“I recently had the aluminium bifold doors installed in my home, and I must say, I'm thoroughly impressed! The team at 6 Day Doors was professional and worked efficiently to get everything installed within the promised timeframe. ”
“6 Day Doors transformed my kitchen area with a stunning roof lantern, and I couldn't be happier with the result. From the initial consultation to the installation, their team was attentive, knowledgeable, and responsive to my needs.”
Send us the window sizes, style, colour, glazing, hardware requirements and delivery postcode. We will confirm the right specification and provide a fast trade quote.
