Door Width Measurement
Measure brick-to-brick at three points: top, middle, and bottom of the opening. Use the smallest measurement and deduct 10mm from it to allow for a proper fit.
If you’re looking for flush casement windows that combine modern aluminium performance with a timeless, flush exterior finish, you’re in the right place. Designed specifically for trade professionals, our flush aluminium windows deliver consistent quality, fast turnaround, and flexible specification options, so you can complete projects efficiently without compromise.
Whether you’re working on a refurbishment or a new build, these windows offer the sleek, flat external appearance that clients expect, with robust internal performance that meets current building standards.
Lead Time
From 6 Days
Glazing
Double/Triple
Finishes
Full RAL Range
Supply
Trade Only
Complete the form to receive a tailored aluminium flush casement window quote, or speak to our team about your project requirements. We’re here to help you complete projects faster and more efficiently.
At 6 Day Doors, we manufacture aluminium flush casement windows with a clear focus on trade priorities:
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Flush casement windows sit level within the frame, creating a clean, streamlined look externally while maintaining a refined stepped profile internally. This makes them ideal for both contemporary builds and heritage-style upgrades where symmetry and detail matter.
Standard colours delivered in as little as 6 days, so you can complete projects efficiently without compromise.
Consistent quality across every order, with manufacturing built around the demands of trade professionals.
Made to your exact sizes and specifications, fully configurable for any project requirement.
The flush exterior gives the smooth, flat appearance clients expect, while the refined stepped profile inside adds character and detail. It’s a combination that works equally well across contemporary architecture and heritage-style refurbishments.
Ideal for:
When specifying windows for your projects, performance matters just as much as aesthetics. Our flush aluminium windows are engineered to meet the demands of modern construction.
When specifying windows for your projects, performance matters just as much as aesthetics. Our flush aluminium windows are engineered to meet the demands of modern construction.
Robust materials and modern locking systems deliver high levels of protection for both residential and commercial projects.
Security features include:
No two projects are the same, which is why our flush casement windows are fully configurable. Choose from a wide range of frame layouts, finishes, and glazing options to match any specification.
Configure your windows to suit any project requirement:
Browse all available colour finishes.
Match the look of your project with a wide range of finishes and glazing packages:
View our top flush window products to see available configurations and styles.
We understand that pricing isn’t just about cost. It’s about margin, reliability, and speed. Our aluminium flush casement windows are priced competitively for trade customers, with:
Clear pricing tailored to your project, with no hidden costs.
Volume pricing available for larger projects and repeat trade orders.
No compromise on build quality, manufactured in-house for full control.
Because we manufacture in-house, we maintain control over costs and timelines, so you can quote confidently and deliver on time.
Built to perform in all UK climates and conditions, our flush casement windows are engineered for long-term reliability in even the most demanding environments.
A complete range of hardware options to meet every project specification, from fire escape compliance through to easy-clean functionality.
Need technical specs for your job? Contact us now for full documentation.
One of the biggest pain points in the trade is delayed supply. That’s why we’ve built our process around speed and reliability. Every order is securely packaged and delivered ready for installation, complete with detailed fitting instructions.
We’re more than just a supplier, we’re a partner to your business. From first enquiry to final delivery, we’re focused on helping you complete projects faster and more efficiently.
Specialist guidance from specification through to delivery, with consistent product quality on every order.
A one-stop shop for windows, doors, and accessories, covering everything you need on a project.
In-house manufacturing built around dependable lead times and consistent delivery scheduling.
Need windows urgently? Speak to our team today.
Common questions from trade professionals about our aluminium flush casement windows. Can’t find what you need? Speak to our team.
Flush casement windows are designed so the opening sash sits flat within the frame, creating a smooth, flush external appearance. They combine clean aesthetics with modern performance.
Yes, aluminium flush casement windows can achieve excellent thermal performance when combined with high-quality glazing and thermal break technology, helping meet current building regulations.
Standard lead times are typically from 6 days for common specifications and colours, making them ideal for time-sensitive projects.
Yes, they are fully customisable with a range of sizes, configurations, colours, glazing options, and hardware choices to suit different project requirements.
Yes, their flush external design makes them suitable for heritage-style projects, especially when paired with appropriate finishes and detailing.
Yes, we specialise in supply-only aluminium flush casement windows for trade customers, with full technical support and fast delivery.
