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Aluminium Casement vent over fixed left fixed over fixed right double glazed windows Supplied & Installed

Aluminium Casement vent over fixed left fixed over fixed right double glazed windows combine the most popular style with the most popular window material. It’s no wonder they are so loved by homeowners with their high-performance benefits, including A energy ratings and superior weather resistance. With their slender frames, they’ll let in an abundance of natural light to brighten your home.

They can suit any home with a range of customisation options such as Georgian bars, decorative glazing and a plethora of Aluminium window coloured frame designs.

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    Why choose Aluminium Casement vent over fixed left fixed over fixed right double glazed windows?

    Versatile window design

    We offer two popular profile choices; contemporary Chamfered style or the traditional Ovolo sculptured style.

    Energy saving design

    Available with 3, 5 and 6 insulating chambers, our multi-chambered Aluminium casement windows attain A energy ratings with ease.

    Superior security

    Featuring locks embedded into the frame, optional security enhancements include fixing the hardware into the steel reinforcements and PAS 24 window security compliance.

    Low maintenance

    Our Aluminium casement windows offer a maintenance-free design that won't rot, crack, warp, or fade throughout its lifespan.

    Sustainably sourced

    As well as offering EcoMax Glass as standard, our Aluminium casement windows are created from 80% recycled manufacturing off cuts.

  • Technical details
  • Colours
  • Glazing
  • Frame Options
  • Furniture
  • Advice + Guidance
  • Additional Features
  • Technical details

    FeatureOW-70 SlimlineOW-80 Premium
    Sightline65mm91mm
    Max Sizes (HxW)4,800mm4,800mm
    Max WeightUp to 50kgUp to 50kg
    U-ValueUp to 1.2 W/m²KUp to 0.8 W/m²K
    SecurityPAS 24PAS 24
    Guarantee (Standard)10 years10 years
    Glazing OptionComfort Glass/ EcoMAXComfort Glass/ EcoMAX

    Colours

    Our aluminium casement windows can be made in any RAL colour. This way you can choose to make your home stand out with vibrant bold colour or find a shade that exactly matches the rest of your home.

    White

    White

    Clotted Cream

    Clotted Cream

    Pearl Grey

    Pearl Grey

    Chartwell Green

    Chartwell Green

    Elephant Grey

    Elephant Grey

    Slate Grey

    Slate Grey

    Slate Grey Grained

    Slate Grey Grained

    Basalt Grey

    Basalt Grey

    Anthracite Grey

    Anthracite Grey

    Anthracite Grey Grained

    Anthracite Grey Grained

    Black Brown

    Black Brown

    Steel Blue

    Steel Blue

    Racing Green

    Racing Green

    Ruby Red

    Ruby Red

    Turner Oak

    Turner Oak

    Irish Oak

    Irish Oak

    Golden Oak

    Golden Oak

    Rosewood

    Rosewood

    Mahogany

    Mahogany

    Walnut

    Walnut

    Dark Oak

    Dark Oak

    Glazing

    We offer double glazing and Comfort Glass options that are designed to outperform triple glazing thanks to the inclusion of a tough laminated layer and an effective low-e coating. You can also personalise your new casement windows further with our range of textured and patterned glazing for added privacy or decoration.

    The benefits of upgrading your glazing are truly limitless - the most notable features include increased warmth, reduced energy bills & beating future energy price hikes. For complete peace of mind, we also offer toughened glazing options to enhance your home security further.

    Frame Options

    Choose the perfect profile for your finished window

    We have a number of distinctive styles of frame to choose from. The chamfered option is a contemporary, straight-edged style while the ovolo option provides a more traditional, decorative finish. Our flush option sees sashes that finish flush with the external face of the window.

    Ovolo Frame

    Ovolo Frame

    Flush Sash Frame

    Flush Sash Frame

    Chamfered Frame

    Chamfered Frame

    Furniture

    Stylish furniture to make your windows even more complete

    We offer a range of furniture for your windows to look the part. Whether you want the traditional look with monkey tail handles in a vintage finish, or contemporary brushed steel, our elegantly designed handles bring form to functionality and are designed to fit naturally into the user’s hand. You can also choose from our selection of window restrictors and pegs.

    Furniture Handle Options

    Window Handle

    Window Handle

    Monkey Tail Handle

    Monkey Tail Handle

    Pear Drop Handle

    Pear Drop Handle

    Furniture Colour Options

    Black Finish

    Black Finish

    Brass Finish

    Brass Finish

    White Finish

    White Finish

    Chrome Finish

    Chrome Finish

    Steel Finish

    Steel Finish

    Advice + Guidance

    Additional Features

    Authentic Timber Look Cill

    For an even more authentic look, our Radlington Cill is a superior upgrade to our standard cills. Comprising of deeper nosed cills, one at the standard 30mm height and another at a 55mm height, these are modern interpretations of timber cills.
    Window with a white cill

    Overhead Ventilation

    Our overhead concealed ventilation features an overhead slot vent system that incorporates the ventilation in the head drip, meaning the external trickle vent is concealed on the head of the outer frame, providing a much-improved finish.
    Window with an overhead concealed vent

    Our Order Process

    1. Contact Us for Expert Advice: Reach out to us through our contact form, call us at 0800 666 444, or visit our double glazing show centres across the South East UK. We’re here to guide you on planning permission, energy ratings, and the best materials for your home.
    2. Get Your Free Quote Fast: After we gather your window specifications, either by visiting your home or via communication, expect a no-obligation quote from us within 24 hours to help you make an informed decision.
    3. Efficient Installation Process: Once your order is confirmed, our smooth process kicks in, starting with a detailed survey, progressing through manufacturing with the latest techniques, and culminating in the installation of your new double glazed windows by our skilled team, followed by a final check to ensure everything meets your expectations.
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    A man standing outside of his SEH BAC Double glazing installer van.
    Replacement uPVC casement vent over fixed left fixed over fixed right double glazed windows

    Replacement Aluminium Casement vent over fixed left fixed over fixed right double glazed windows

    One of the key benefits of upgrading to modern Aluminium windows is that they’re essentially maintenance-free. You won’t need to worry about any upkeep or repainting. We only recommend the occasional wipe with a damp cloth to remove any build-ups of debris.

    As the most affordable window material, you can be sure that it doesn’t compromise on performance. Our modern Aluminium windows utilise an advanced multi-chambered window profile, maintaining a comfortable temperature all year round. You’ll even save money on your energy bills.

    Security is another main advantage of replacement double glazed casement windows. With high-quality multi-point locks, you can rest assured that our windows will keep your home and family safe. For absolute peace of mind, additional security enhancements include fixing the hardware into the steel reinforcements and PAS 24 window security compliance.

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    Slimline aluminium casement windows in a range of modern styles and designs

    With a powder coating that can be designed in over 150+ RAL colours and finishes, they can easily accommodate any homeowner’s individual tastes. From contemporary Anthracite Grey, to elegant Chartwell Green, or traditional Cream frames, aluminium choices are incredibly versatile.

    Aluminium windows can be installed with either double glazing or comfort glass units. Both utilise innovative specifications to ensure that the warmth is kept inside and the cold out. This is achieved through a design that uses two panes of glass that surround an argon gas-filled chamber. Our advanced Comfort Glass options are designed to outperform triple glazing thanks to the inclusion of a tough laminated layer and an effective low-e coating. So, not only are they highly thermally insulating, but they’ll also reduce the external noises that enter your home.

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    Full aluminium bay window installation
    Two people who identifies as men Installation windows.

    10 Year Guarantee

    Our Aluminium casement windows are crafted with the highest quality materials, ensuring they maintain their functionality for years. We stand behind our craftsmanship with a ten-year guarantee, offering peace of mind and assurance in your investment. This commitment reflects our dedication to exceptional workmanship and customer satisfaction.

    Check our finance options

    Frequently Asked Questions

    Find all the answers to our most frequently asked questions below.

    How much will new aluminium casement windows cost?

    There are many aspects to consider when purchasing new windows, such as material, thermal performance and whether it's been accredited by industry bodies to ensure it's quality. To accommodate the majority of budgets, we offer a range of comprehensive finance options, including 2 years interest free credit & buy now pay later. Find more information on double glazed window prices here.

    Which window material is best?

    The first decision you need to make is which window material is right for your home. Your final decision will be heavily influenced by your own personal choice, budget, property appearance and building era.   Read more

    Are aluminium windows energy-efficient?

    Strong, adaptable, low maintenance, and aesthetically striking, modern aluminium windows outperform many other window materials in terms of efficiency.

    What is the lifespan of aluminium windows?

    The expected lifespan of aluminium windows is 45 years. That is 10 to 20 years longer than uPVC windows. However, the lifespan can be reduced or improved depending on how well the windows are maintained.

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      By submitting your details you confirm that you agree to the storing and processing of your personal data by SEH BAC as described in the privacy statement.

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      Multi-award winning company

      Here at SEH BAC, we’re proud to have won many prestigious awards for our products as well as our work in the community:

      Installer awards 2022
      G21 Finalist
      SEHBAC showroom winner
      Ultraframe designer winner
      Conservatory and orangery awards winner 2019
      NHIC 2018 Consumer confidence award
      G17 Installer of the year
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      regional retail companies

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      Vetted for professionalism, competency & compliancy

      Improving South East homes for more than 50 years

      With 9 show centres across the South East, you’re not far away from achieving your dream home:

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      Our Accreditations

      FENSA Approved
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      TSI Approved Code
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