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Casement Windows on a house

Casement Windows

At the Traditional Window Company, our expert surveyors and skilled craftsmen work closely with you to create your ideal window design, with a focus on our elegant range of traditional casement windows. These wooden casement windows come in various styles, reflecting your personal taste and the character of your home.

Our casement windows are meticulously crafted, featuring :

  • High-performance ‘A’ rated double glazing and replaceable draught/weather seals for superior insulation
  • State-of-the-art security and child safety locking mechanisms for peace of mind
  • The finest timbers and paint covers available, ensuring durability and aesthetic appeal

Combining these elements, we ensure that every wooden casement window style not only maximises thermal insulation, durability, safety, and security but also beautifully maintains the original period detail and character. Trust us to deliver windows that elevate your home’s charm and functionality.

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    Beautiful, Traditional Handmade Casement Windows

    Many traditional hinged casement windows, although flush fitting, have subtle profiles and period detail inside and out.
    Our casements are individually made with the closest attention to detail to preserve the original character and design.
    Some casement bays are load bearing and require thoughtful design, construction and installation.
    Our casement windows also benefit from:

    Key Features of our casement window

    As bespoke joiners, we can reproduce all casement window styles and profiles including:

    • the latest double glazed sealed units draught/weather seals

    • modified timbers with a 50 year guarantee not to rot or warp

    • advanced micro-porous paint covers

    • internally beaded glazing to enhance security and weather seal

    All to maximise thermal insulation,durability and safety/security


    Examples of our casement windows


    Casement Windows on a house



    I had delayed replacing the original windows to my Edwardian house as I feared losing the fine detail and elegance, but The Traditional Window & Conservatory Company were the answer!. They replicated the exact appearance of the original windows–but what an improvement to both the heatand sound insulation!!. I am delighted! The company employees and representative were also polite,helpful and efficient. Thank you.

    Ms Campbell, TW1

    2 years ago, we had 10 new wooden sash windows made and installed. This was after initially approaching 10+ companies and meeting up with 3. As I type this they are back at our house replacing the whole of our front elevation being 4 sash and 6 casement windows, so as you can tell we think their windows are great …. PS I am a Chartered Surveyor and would not recommend lightly.

    Mr Talbot,W4

    From day one TWCC were impressive providing sound advice and a detailed quotation with options. Their products and quality workmanship are second to none and their fitters are highly skilled and leave little mess behind. Keep up the good work – our house looks better and is much warmer!.

    Mr Vasdekys, W12

    Thank you for creating and installing such good quality windows to meet our ever-changing designs. We are very happy with the results and are already recommending you to friends and family.

    Mr Rock, N10

    Before installation rooms and walkways are sheeted up and the old windows are removed from site and disposed of. Our expert fitters will ensure the replacements are finished and trimmed off with internal stub sills, architrave and period trim to mirror the originals. The immediate walls surrounding the window are decorated where applicable to complete the finished look.

    Timbers Used for our casement windows

    Stable timbers that enhance paint coating lifespan is the key to the long life of a window because if the coating remains intact, the window will last indefinitely.


    Accoya®A modified timber and one of the world’s leading, long-life woodswith a 50 year warranty against rot and warping.
    Laminated TimberVacuum/pressure, Protim water based treated Redwood with a 30year warranty against rot and warping
    Natural FinishLight oaks, Douglas Fir and Red Grandiswith a 30 year warranty


    Glass & Glazing TypesGlazed to ‘A’ rated specification mainly consisting of 20mm Optiwhite glazing double glazed sealed units (4-12-4). This provides a centre pane U-value of 1.2w/m2k (the lower the number, the better the thermal insulation); The use of OptiwhiteTM glass helps to provide high visual clarity and purity of colour as there is no green tinge associated with some double glazing. This glass also gives more solar heat gain since it allows more heat from the sun, which can save on energy bills during the winter months.
    Other Glazing
    • Toughened glass for safety
    • Laminated glass for security and safety
    • Acoustic glass to reduce sound transmission from road traffic, aircraft, trains etc. (example installations available to consult)
    • Obscure glazing, etched, patterned or textured for privacy or design
    • Leaded glazing with antique patina finish to mirror original leads
    • Traditional decorative coloured leads to mirror original design
    • Slim 7,9,11,12 or 14mm double glazed units for Conservation areas and Listed Buildings where solid glazing bars and traditional putty bead are required
    • Easy clean glazing; a consideration for out of the way windows i.e. mansard roofs
    • Solar control glazing to help block the sun’s radiant heat especially for high exposed south facing windows
    • Curved double glazed units to help replicate the original window curved profiles.
    Draught/WeatherproofingTo enhance the thermal insulation of the window, high specification seals, concealed within the window structure, are positioned so that they can be easily replaced if and when necessary.


    FinishesThe latest, most advanced micro-porous treatments and finishes are used to maximise longevity and minimise future maintenance.
    • We can colour match specified paint colours
    • Dual colour option available in or out
    • Natural wood finish in low maintenance pigmented micro-porous stains
    • Traditional box sashes fitted with high quality ironmongery in brass, chrome shiny or matt finish (other materials available)
    • High quality pulleys in matching material with pre-stretched sash cords and lead weights to maximise opening of sashes and ensure smooth, effortless operation.
    • Modern spring/spiral balance where required
    Safety & SecuritySecurity, lockablesash fasteners and 2 (No.) sash stop locks fitted to each window, including child safety/ventilation locks as standard.


    What are the key features of your Casement Windows?

    Our Casement Windows are bespoke and feature high-performance ‘A’ rated double glazing and replaceable draught/weather seals for maximum thermal insulation. They’re made from the finest timbers available and come with a warranty against rot and warping. Additionally, they have advanced micro-porous paint covers, security and child safety locking, and are internally beaded to enhance security and weather seal.

    What kind of glass is used in your Casement Windows?

    We use the latest 20mm the double glazed sealed units for our casement windows, offering excellent thermal insulation and visual clarity. We also offer options for toughened glass for safety, laminated glass for security, acoustic glass to reduce sound transmission, and a range of other glazing options to meet your specific needs.

    What types of timber do you use for your Casement Windows?

    We use a variety of high-quality timbers such as Accoya®, a modified timber with a 50-year warranty against rot and warping, and other options like laminated vacuum/pressure treated timber and natural finish timbers like light oaks, Douglas Fir, Sapele Red Grandis.

    How are your Casement Windows installed?

    Our expert fitters ensure a clean and efficient installation process. The old windows are removed and disposed of, and the new windows are carefully fitted and trimmed off with internal stub sills, architrave, and period trim to mirror the originals. We also make good where applicable to the immediate walls surrounding the window to complete the finished look.

    What kind of finishes can I choose from for my Casement Windows?

    We offer a range of finishes using the most advanced micro-porous treatments to maximise longevity and minimise maintenance. We can colour match specified paint colours, provide a dual colour option, and offer natural wood finishes.

    What measures are taken to ensure the security of your Casement Windows?

    We prioritize safety and security. Our Casement Windows are fitted with security, lockable fasteners and stays for each window, including child safety/ventilation locks as standard.

    Can your Casement Windows be installed in conservation areas and listed buildings?

    Yes, we are well-versed with planning requirements and have undertaken numerous successful planning applications and appeals for such properties. Where required, we also arrange for a Fensa Building Regulation Certificate of Compliance following installation.

    How do you ensure the longevity of your Casement Windows?

    Longevity is ensured through the use of high-quality, durable materials like stable timbers that enhance paint coating lifespan, and advanced double glazed sealed units. Moreover, the use of replaceable draught/weather seals allows for easy replacement when necessary. All covered with a 10 year insurance backed guarantee.

    What kind of ironmongery is used in your Casement Windows?

    We use high-quality ironmongery in our Casement Windows, available in brass, chrome shiny or matt finish. Traditional or modern multi-point locking.

    Conservation Areas & Listed Buildings

    We are conversant with the requirements for planning and have undertaken many successful Planning applications and where required, successful appeals to The Planning Inspectorate.

    Fensa Building Regulation Certificate of Compliance

    Where applicable for windows and doors we will arrange certification following installation.

    Our Accreditations


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