Flush Casement Windows – Double & Triple Glazing
Flush casement windows have become one of the most sought-after window styles in the UK, offering a clean, contemporary look combined with the proven performance of modern uPVC glazing. At Window Supply Direct, we supply flush casement windows manufactured on the Eurocell profile system and deliver them direct to your door across England and Wales — at factory-direct prices.
Whether you're a homeowner upgrading your property or a trade installer sourcing supply-only windows, you can get an instant online price without handing over any personal details.
What Are Flush Casement Windows?
Unlike a standard casement window — where the opening sash sits proud of the outer frame — a flush casement window features a sash that sits perfectly in line with the surrounding frame. The result is a smooth, flat face with no projecting outer bead; a look with its roots in traditional timber joinery, now available in modern, low-maintenance uPVC.
This style is especially popular in:
- New build developments — where architects specify a sleek, contemporary aesthetic
- Heritage and period properties — where planning conditions favour a more traditional appearance
- Conservation areas — flush casements are often an acceptable alternative to timber
- Renovations — upgrade from timber originals without compromising on kerb appeal
Double Glazed Flush Casement Windows
Our double glazed flush casement windows offer an excellent balance of thermal performance, noise reduction and value — ideal for the vast majority of UK homes.
Key Features – Double Glazing
Triple Glazed Flush Casement Windows
For homeowners and builders who want the very best in thermal performance and acoustic insulation, our triple glazed flush casement windows take things a step further. With an additional pane of glass and two gas-filled cavities, triple glazing delivers noticeably lower U-values and a significantly quieter indoor environment.
Key Features – Triple Glazing
Double vs Triple Glazing – Which Should I Choose?
| Double Glazing | Triple Glazing | |
|---|---|---|
| Typical U-Value | ~1.2 W/m²K | ~0.8 W/m²K |
| Acoustic Performance | Good | Excellent |
| Energy Saving | High | Very High |
| Weight | Standard | Heavier |
| Best For | Most UK homes | High-spec builds & noisy locations |
| Investment Level | More affordable | Premium |
Why Buy From Window Supply Direct?
Available Colours & Finishes
Our flush casement windows are available in a wide range of foiled finishes to complement any property style. Dual-colour options are available, with a different colour on the interior and exterior faces — popular with those who want anthracite grey or black outside with a white finish inside.
Frequently Asked Questions
Flush casements carry a small premium over standard casements due to the additional precision in their manufacture. However, buying direct from Window Supply Direct means you pay significantly less than going through a traditional window company or installer.
In many cases, yes. Flush casements are generally considered a more sympathetic alternative to standard casements in conservation areas and on listed buildings, though you should always check with your local planning authority before ordering.
Yes, if you're comfortable with general DIY. We supply a free step-by-step installation guide to help you through the process. Many of our customers are self-builders and experienced DIYers who fit their own windows.
We offer a wide range of standard sizes, and our live pricing engine will show you all available dimensions. If you have specific requirements, contact our team on 01684 891588 and we'll do our best to help.
Yes. Both our double and triple glazed flush casement windows meet and exceed current UK Building Regulations for thermal performance (Part L).
Lead times vary, and we'll confirm your estimated delivery date at point of order. We deliver throughout England and Wales for a flat £39.99 delivery charge.
Order Your Flush Casement Windows Today
Our instant online pricing engine to configure your flush casement windows will be live soon. In the meantime use our live chat or call 01684 891588 to get an instant quote today.