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Casement Windows

High performing aluminium casement windows for residential and commercial applications. Our casement windows can be specified in three different models: standard casement, heritage, and tilt-before-turn. They are fully customisable with outstanding performance.Get a Quote

Features & Benefits

High performing aluminium casement windows

Aluminium casement windows from Midori Aluminium are some of the highest-performing windows available today. Fabricated using premium AluK Optio 58BW profiles, they are strong and secure and provide some of the slimmest sightlines in the glazing industry.

A-rated for outstanding thermal performance

PAS 24 and Secured by Design security accredited

Multi-point locking systems as standard

Bay, chamfered, contemporary, and ovolo profiles

Dual colour options for the frame interior and exterior

Choice of internal or external glazing

Available with a durable anodized finish

Super slim sightlines for enhanced natural light intake

Product Options

Our casement windows are fully customisable to find the perfect style for your property

  • Colours
  • Glazing
  • Hardware
  • Downloads
  • Colours







    Dark Blue

    Dark Blue





    Anthracite Grey

    Anthracite Grey



    Bespoke RAL colour

    Bespoke RAL colour

    A range of attractive colours to complement any installation

    Our aluminium casement windows are available in a selection of attractive colours. From textured and metallic finishes to durable anodized options, our windows can be matched with almost any property’s architectural aesthetic. Whether you want a sleek contemporary shade or a classic heritage colour, we have an extensive array of options for you to browse.

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    High performing glazing options to maximise performance

    All Midori Aluminium casement windows are fitted with high-performing double glazing. With glazing thicknesses of either 24mm or 40mm, our casement windows can be designed to suit your needs. Because of the inherent strength of our aluminium frames, large expanses of glass can be easily supported. This allows for super slim sightlines to optimise natural light.

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    beige optio 58bw flush window


    A selection of attractive and smooth-functioning hardware and accessories

    At Midori Aluminium, we use a range of professional industry experts to supply our window hardware. Working with Aluspec, Alpro, VBH, and Titon, we can offer all our customers an extensive range of hardware options. From sleek and modern handles and hinges to traditionally designed window accessories, our hardware is durable and attractive, perfect for any window installation.

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    modus sliver close handle


    Download our product brochures for more detailed technical information

    All our downloadable brochures and guides are completely free to access by clicking on the links below. Find out all you need to know about our range of aluminium casement windows from colour options to configurations and glazing to thermal performance. Our downloads will also provide inspirational images to showcase your products to any potential customers.

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    Choice of window styles

    Aluminium casement windows to match a variety of design requirements

    Our aluminium casement windows are available in three different styles. Standard casement windows have an open-out configuration and are a popular choice with a wide variety of installation projects. Our heritage windows are designed to replicate the classic look of traditional steel Crittal windows. While our tiltbeforeturn windows provide an innovative opening action for easy access to the exterior windowpane, ideal for use in multi-occupancy properties.

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    large house front with 9 casement white uPVC windows right angle close up
    beige optio 58bw flush window
    white uPVC house front casement windows
    beige uPVC casement lipped windows

    Technical information

    High-specification aluminium casement windows from Midori Aluminium

    • Glazing thicknesses between 24mm and 40mm 
    • Frame depths of either 58mm or 70mm 
    • Polyamide thermal break technology for improved energy efficiency 
    • Integrated deep head profiles for easy trickle vent compatibility 
    • U-values as low as 1.4 W/m²K (double glazing) or 1.2 W/m²K (triple glazing) 
    • Q-mark certification for superior quality 
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    Our most regular casement window FAQs

    Want to find out more about our aluminium casement windows? Have a read of the answers to some of the most frequently asked questions that we receive. If you can’t find the answer to what you’re looking for, send us a message using our online contact form and we’ll get back to you as quickly as possible.

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    What are your average lead times?

    We offer all our regular customers superfast lead times of just a few days. For new customers, we offer excellent industry lead times of two to three weeks. Please note that standard product orders will be quicker than bespoke product designs.

    What colour options are available?

    All our aluminium glazing products are powder coated in a selection of standard RAL colours. Bespoke RAL colours are available on request with dual colour options, anodized and marine-quality finishes also possible.

    Do you have a showroom where we can view your products?

    Yes. Our showroom is located in a separate unit alongside our main factory and headquarters. It is open five days a week and there’s always a member of our team on hand to help with your enquiries.

    Where do you deliver to?

    We deliver to locations across the UK. This includes throughout England, Scotland, and Wales for glazing installations, trade deliveries, and commercial glazing supply and installation.

    Do you offer any finance packages?

    No. We offer all our customers extremely competitive prices on all products. This includes design, manufacturing, supply, and installation. We also provide comprehensive 10-year warranties on all our products.

    Our process

    Streamlined processes to maximise efficiency and deliver quality

    At Midori Aluminium, we work tirelessly to provide our customers with the best possible service. From the initial enquiry through design and manufacturing to product delivery and installation, we work closely with every customer to ensure only the highest standards.

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    Get in touch

    Contact us with your project details and requirements. We will provide you with a free, no-obligation quote and answer any questions you may have.

    Select your products

    Choose from our range of high-quality aluminium windows and doors, available in various styles, colours, and configurations. We will design and manufacture your products to your exact specifications and preferences.

    Product delivery

    Receive your products within the agreed time frame. We will deliver them to your site or premises, ensuring they are well-packaged and protected during transit.

    Ready to install

    Enjoy a hassle-free installation service. Our high-quality products are easy for installers to work with, and homeowners can enjoy professional installation from our experienced and qualified team.