Aluminium Flush Casement Windows

Flush Casement Windows

For the perfect sleek, practical design, aluminium flush casement windows offer a range of benefits. Thanks to slimmer sightlines, these durable frames slot seamlessly into both period-style and contemporary homes. Get in touch today for nationwide delivery through our trusted installers.

Why choose atlas?

built for quality

We manufacture to the highest standards using premium materials.

made to perform

Products are secure, thermally efficient, and meet building regulations.

approved installers

Approved partner installers ensure every product is fitted perfectly.

nationwide coverage

We operate across the UK, supporting homes nationwide.

Atlas Flush Casement Windows

Flush casement windows fit neatly into any modern or traditional home aesthetic, without protruding like standard casement windows. Aluminium offers a durable, insulative frame for flush casement windows, with slim sightlines to allow in more natural light and blend with the surrounding wall.

Available in both fixed and opening configurations, our aluminium flush casement windows are ideal for new builds or heritage homes, with both traditional and bay window setups.

Our simple process

Browse our windows,
doors and glazed roof
systems.

Get in touch to
tell us what you’re
interested in.

We’ll match you
with an approved
installer.

Confirm your choice
and look forward to
installation.

Glazed Flush Casement Windows for Modern Homes

Our practical flush casement windows feature optional trickle vents, lock upgrades and thermally broken profiles. This results in excellent energy efficiency, security, weather protection, and long-lasting performance.

Durable

Resistant to rust, warping, and fading for long-term performance.

Energy efficient

WER rating from B to A+ depending on product.

Security certified

PAS24:2022 security available as an upgrade option.

Weatherproof

Air test Class 4, water test E1200 and wind test AE2400

Customisable options

Choose from a selection of styles, colours, handles and glazing options with our aluminium flush casement window designs.

Custom styles

Choose from a range of modern and traditional styles.

Multiple colours

Select from a vast palette of single and dual colours.

Handle choices

Pick your perfect casement window handles.

Glazing options

Double glazed and triple glazed options available.

Design configurations

Explore a range of window opening configurations, from side-hung and top-hung designs to fixed, dummy sash and mixed.

side hung

top hung fixed bottom

top hung

Dummy Sash

Fixed

Mixed

Stock colour options

Choose from four stock colours – white, anthracite grey, anthracite grey on white, and black.

White

Grey

Grey on White

Black

Special colour options

Alternatively, select from hundreds of RAL colour options or KL colours for a custom finish.

RAL Colour Range
250+ more

KL Colour Range

Inline Angled Window Handle

Manufactured from 316 Marine Grade Stainless Steel.

Offset Window Handles

White, black, grey, polished chrome, smooth satin chrome, polished gold offset handles.

Monkey Tail Handles

Bronze, black, pewter, polished chrome, polished gold, smooth satin and white monkey tail handle colour options.

Pear Drop Handles

Bronze, black, pewter, polished chrome, polished gold, smooth satin and white pear drop handle colour options.

Trickle Vents

Improving indoor air quality, reducing condensation, and maintaining security and heat efficiency.

Quick Glaze Knock-in bead (Alitherm 400)

Designed for faster, easier installation, reducing time on site without compromising quality.

Key Specifications

All our aluminium flush casement windows meet these standards as a minimum, though some have optional upgrades for improved performance.

Marine grade polyester powder coating
U value as low as 1.4w/m2k (double glazed) depending on product
U value as low as 1.0w/m2k (triple glazed) depending on product
28mm double glazed or 40mm triple glazed
Side hung max o/a width 864mm

Side hung max o/a height 1400mm
Top hung max o/a width 1400mm
Top hung max o/a height 1500mm
Frame depth 70mm
Optional trickle vents
Air, water and wind tested

Take a look for yourself

Have a browse through our comprehensive range of flush casement window designs, showcasing opening options, colours and finishes to suit your needs.

Download Brochure

Frequently Asked Questions

Explore our most frequently asked questions to learn more about aluminium flush casement windows and their features, lifespan, and advantages.

Flush fit casement windows feature a pane that sits flush within the frame when they are closed. It does not protrude, which means it can blend seamlessly into the rest of the wall, ideal for contemporary designs.

Alternative casement window designs are ‘lipped’, which means they protrude from the property.

Though sometimes associated with contemporary properties, flush casement aluminium windows can work well in period homes. As they sit flat against the wall, they are simple to install, and can also mimic the timber effect of some traditional homes.

With a range of colours available, they can suit any aesthetic, bringing modern, energy-efficient features to more classic designs.

You can have flush casement bay windows installed. If your windows protrude from the house, the frames and panes can still be installed ‘flush’ within the overall angular design of a bay window, creating a seamless look with slim sightlines and maximum natural light.

Our extensive range of designs, from standard to flush sash casement windows, is highly energy efficient. This is thanks to thermal break technology, which traps air to reduce heat transfer. This results in lower U values and a WER rating from B to A+, depending on the product.

All Atlas Aluminium flush casement windows are delivered by one of our trusted installers. When you get in touch, we’ll match you with a verified local installer with the skills to complete your project to your exacting requirements. We’ll also be on hand to answer any questions you might have.

Atlas Aluminium supplies flush casement window designs nationwide, using a network of locally trusted and verified installers. Wherever you are in the UK, our friendly installers will be available to help you bring your vision to life.

Discover other Window products at Atlas

What sets Atlas apart

As a specialist manufacturer of aluminium flush casement windows, we guarantee totally bespoke design that matches your needs. Our proven systems have been trusted nationwide, with consistent standards across all our glazed products to provide you with security, durability and stunning design.

With trade-only supply and verified installers, we’re here to deliver quality and support at every step of the journey. Get in touch today to start your design.