Door Width Measurement
Measure brick-to-brick at three points: top, middle, and bottom of the opening. Use the smallest measurement and deduct 10mm from it to allow for a proper fit.
6 Day Doors manufactures and supplies aluminium casement windows for installers, builders, glazing companies and construction professionals. Choose from a range of casement configurations for replacement and new-build projects, then configure the size and options online or request a quote for project support.
For installers, builders and glazing companies
Configured to your project dimensions
Stays, restrictors, handles and trickle vents
Manufactured and supplied by 6 Day Doors
Available options vary by style and can include different frame, vent and transom sections, friction stays, window restrictors, locking or non-locking handles, trickle ventilation and ancillary profiles. Browse the casement window styles below to start your specification.
Please fill in the form below to get your quote request.
Our aluminium casement window range is designed for trade customers who need a clear route from product selection to specification and quotation. Each style has its own valid size range and configuration options, so select the closest layout first and then use Configure Now to enter the project dimensions and available choices.
If the job has a particular functional or design requirement, our team can help you confirm the specification before manufacture. This is especially useful where the project needs specific opening requirements, ventilation, hardware, glazing or ancillary frame details.
Where a project has a specific security, thermal, ventilation or weather-performance requirement, confirm it against the final window specification before ordering. 6 Day Doors can help you check the selected configuration and any relevant hardware, glazing or ventilation requirements for the job.
Aluminium casement window size limits vary by style, so use the individual product configurator to check the dimensions available for the selected layout. Colour, glazing and hardware availability also depends on the final specification. If you need a non-standard finish or a particular glazing requirement, include it in the quote request so the team can confirm the available route.
For colour planning, you can also review the 6 Day Doors RAL colour information, then confirm the final finish against the selected window specification before ordering.
Fast lead times are available on eligible standard specifications, with the current production time confirmed at quote stage. Non-standard sizes, colours, glazing or hardware can affect production time, so confirm the live lead time before committing to an installation date.
Windows are supplied with fitting information and site protection, with trade support available if you need help checking the order before manufacture. For delivery arrangements or access requirements, review the current delivery information or contact the team.
Depending on the selected style, your specification can include:
For trade project support, see our trade windows, doors and roofs page, or review our product guarantees and customer reviews before ordering.
Need a different window style? Browse the related window ranges.

Browse the full aluminium window range

Flush-finish casement alternative

Vertical sliding aluminium windows

Every window style from 6 Day Doors
Want to see the quality before placing a larger trade order? 6 Day Doors has showrooms across the South East, including Brentwood, Loughton, Romford and Epsom. Contact the team before travelling to confirm which aluminium casement window styles are currently on display at your preferred showroom.
Contact 6 Day Doors to check the current showroom display range, or call 0203 835 2007 for trade specification support.
Style / configuration
Choose the closest casement layout from the category product grid.
Size
Enter the required dimensions within the valid range for that product style.
Frame / opening specification
Confirm required frame, vent, transom and opening/stay choices.
Glazing / performance
State any project-specific glazing, thermal, security or weather requirements.
Colour / finish
Confirm the required frame finish and any non-standard colour requirement.
Hardware / ventilation
Confirm handles, restrictors, trickle vents and related options.
Cills / add-ons
Include required cills, frame add-ons and ancillary profiles.
Yes. 6 Day Doors manufactures and supplies aluminium casement windows for installers, builders, glazing companies and construction professionals, with configuration and quotation support available before manufacture.
Yes. The available width and height limits vary by window style and configuration. Choose the closest product layout and use the configurator to check the valid dimensions, or ask the team to help with the specification.
Options vary by style but can include different frame, vent and transom sections, friction stays, fire-escape, egress or easy-clean facilities, window restrictors, locking or non-locking handles and trickle ventilation.
Fast lead times are available on eligible standard specifications. The current production time should be confirmed when you request a quote, particularly for non-standard sizes, colours, glazing or hardware.
6 Day Doors has showrooms across the South East. Contact the team before travelling to confirm which aluminium casement window styles are currently on display at your preferred showroom.
No. 6 Day Doors lists aluminium flush casement windows as a separate range. Use the flush-casement category if your project specifically requires that style.
“I recently had the aluminium bifold doors installed in my home, and I must say, I'm thoroughly impressed! The team at 6 Day Doors was professional and worked efficiently to get everything installed within the promised timeframe. ”
James
“6 Day Doors transformed my kitchen area with a stunning roof lantern, and I couldn't be happier with the result. From the initial consultation to the installation, their team was attentive, knowledgeable, and responsive to my needs.”
Sarah
Send us the window sizes, style and configuration, colour, glazing, hardware and ventilation requirements and delivery postcode. Our team will confirm the specification and return a trade quotation.
White
Red
Blue
Green
Black
Dark Wood
Light Wood
Azure Blue | RAL 5009
Mist Grey | RAL 7035
Devon Cream | RAL 9001
Chartwell | CSP 029
Aubergine | CSP 007
Anthracite | RAL 7016
Pastel Pink | RAL 3015
Agate Grey | RAL 7038
Slate | RAL 7015
Embers | RAL 7044
Fossil | RAL 7042
Shadow | RAL 7005
Cambridge Blue | RAL 5024
If you would like a different internal colour for your product, please select 'Yes' and choose your colour.
White
Red
Blue
Green
Black
Dark Wood
Light Wood
Azure Blue | RAL 5009
Mist Grey | RAL 7035
Devon Cream | RAL 9001
Chartwell | CSP 029
Aubergine | CSP 007
Anthracite | RAL 7016
Pastel Pink | RAL 3015
Agate Grey | RAL 7038
Slate | RAL 7015
Embers | RAL 7044
Fossil | RAL 7042
Shadow | RAL 7005
Cambridge Blue | RAL 5024
Please be aware that a foiled outer frame and a glass-reinforced plastic frame are made from different materials, which may result in a slight optical color difference.
*Darkwood and Lightwood options are subject to an additional surcharge.
Agate Grey
Anthracite
Black/Brown
Chartwell
Darkwood
Devons Cream
Light Wood
Slate
These guidelines are here to help you measure for a new composite door and frame. If you have any questions, please don't hesitate to contact us; we are happy to assist.
Measure the height and width from the OUTSIDE of your home. Always measure the exact brickwork opening, not the existing frame or door.
Take measurements from brick to brick in at least three different places. Subtract 10mm from both the height and width measurements to allow for a 5mm fitting allowance around the new frame. This allowance ensures the new frame sits plumb and square within the opening. Use packers and silicone to secure the frame in place and fill any gaps.
Measure brick-to-brick at three points: top, middle, and bottom of the opening. Use the smallest measurement and deduct 10mm from it to allow for a proper fit.
Measure brick-to-brick at three points: left, middle, and right of the opening. Use the smallest measurement and deduct 10mm from it to allow for a proper fit.
Measure as above for the main door. For the side panel, measure from the center point of the frame between the door and the side panel to the outer edge of the side panel frame.
Measure as above for the main door. For the top light, measure from the center point of the frame between the door and the top light to the top of the door frame. This gives you the transom drop for the top light.
These guidelines are here to help you measure for a new composite door and frame. If you have any questions, please don't hesitate to contact us; we are happy to assist.
Measure the height and width from the OUTSIDE of your home. Always measure the exact brickwork opening, not the existing frame or door.
Take measurements from brick to brick in at least three different places. Subtract 10mm from both the height and width measurements to allow for a 5mm fitting allowance around the new frame. This allowance ensures the new frame sits plumb and square within the opening. Use packers and silicone to secure the frame in place and fill any gaps.
Measure brick-to-brick at three points: top, middle, and bottom of the opening. Use the smallest measurement and deduct 10mm from it to allow for a proper fit.
Measure brick-to-brick at three points: left, middle, and right of the opening. Use the smallest measurement and deduct 10mm from it to allow for a proper fit.
Measure as above for the main door. For the side panel, measure from the center point of the frame between the door and the side panel to the outer edge of the side panel frame.
Measure as above for the main door. For the top light, measure from the center point of the frame between the door and the top light to the top of the door frame. This gives you the transom drop for the top light.
Elevate the charm of your doors with our exquisite door handle collection. Available in a variety of elegant finishes, our handles are designed to add a touch of sophistication and style to your home.
Straight Handle
Pad Handle
Rectangle Bar
Chrome
Black
Gold
White
Create a lasting impression with our stunning range of door knockers. Available in a selection of striking finishes, our knockers are crafted to bring an element of elegance and charm to your entrance.
Slim Avocet Knocker
Urn Knocker
Available with optional spyhole
Slim Urn Knocker
Available with optional spyhole
Bull Ring Knocker
Chrome
Black
Gold
White
A drip bar is a practical addition designed to prevent water from seeping under your door. It effectively channels rainwater away from the threshold, protecting your interior from moisture and enhancing the longevity of your door.
A door drainage system is a crucial feature that efficiently channels water away from your door. It prevents water from accumulating around the threshold, safeguarding your interior from moisture damage and significantly contributing to the door's durability and longevity.
A door security chain is a practical feature designed to enhance home safety. It allows you to partially open the door while keeping a secure barrier in place, offering peace of mind and an added layer of protection against unauthorized entry.
Chrome
Gold
The threshold is a crucial component that aligns with the door frame on the floor, preventing drafts and water ingress. It ensures the door panel sits securely behind it, providing adequate protection for the bottom of the door.
Available in silver and gold low aluminum options, our thresholds are designed to enhance accessibility by minimizing trip hazards and facilitating easy access for wheelchair users. This practical feature helps maintain a comfortable and secure interior environment.
A door cill is a vital component located at the base of the door frame, offering a sturdy foundation and protection against drafts and water ingress. It ensures the door remains secure and stable, enhancing the overall durability of the entryway.
We offer a variety of cill options to suit your needs, including 85mm, 150mm, and 180mm. Each cill is designed for both functionality and aesthetic appeal, helping to maintain a comfortable and weather-resistant interior environment while adding a touch of style to your home's entrance.
Add-ons are extensions that clip onto the side of your door frame, increasing its thickness or width to provide extra clearance for your composite door. These extensions ensure a perfect fit and smooth operation, especially when additional space is required for proper installation.
Easy to install and highly effective, add-ons enhance both the functionality and alignment of your composite door, making them an excellent choice for achieving optimal performance and aesthetic appeal.
White
Red
Blue
Green
Black
Dark Wood
Light Wood
Azure Blue | RAL 5009
Mist Grey | RAL 7035
Devon Cream | RAL 9001
Chartwell | CSP 029
Aubergine | CSP 007
Anthracite | RAL 7016
Pastel Pink | RAL 3015
Agate Grey | RAL 7038
Slate | RAL 7015
Embers | RAL 7044
Fossil | RAL 7042
Shadow | RAL 7005
Cambridge Blue | RAL 5024
If you would like a different internal colour for your product, please select 'Yes' and choose your colour.
White
Red
Blue
Green
Black
Dark Wood
Light Wood
Azure Blue | RAL 5009
Mist Grey | RAL 7035
Devon Cream | RAL 9001
Chartwell | CSP 029
Aubergine | CSP 007
Anthracite | RAL 7016
Pastel Pink | RAL 3015
Agate Grey | RAL 7038
Slate | RAL 7015
Embers | RAL 7044
Fossil | RAL 7042
Shadow | RAL 7005
Cambridge Blue | RAL 5024
White
White Ash
Cream White
Agate Grey
Anteak
Irish Oak
Rosewood
Moondust Grey
Slate Grey
Anthracite Grey
Black Ash
Antharicite Grey
Black
Chartwell Green
Cream
Oak
Rosewood
White
Whitegrain
Antharicite Grey
Black
Chartwell Green
Cream
Oak
Rosewood
White
Whitegrain
Antharicite Grey
Black
Chartwell Green
Cream
Oak
Rosewood
White
Whitegrain
These instructions are provided to assist you in measuring for a new door and frame. If you have any uncertainties, please feel free to contact us, we will be happy to help you.
Measure both the height and width from the OUTSIDE of your home. Always measure the exact brickwork opening, not the old frame or door currently installed.
Take measurements from brick to brick in at least three different places and subtract 10mm from both the final height and width measurements to allow for a 5mm fitting allowance around the new frame. This allowance will help the new frame sit plumb and square within the opening. Packers and silicone will be required to secure the frame into place and fill any gaps.
Measure brick-to-brick at three points: top, middle, and bottom of the opening. Use the smallest measurement. Deduct 10mm from this measurement.
Measure brick-to-brick at three points: left, middle, and right of the opening. Use the smallest measurement. Deduct 10mm from this measurement.
Measure as above for the main door. For the side panel, measure from the center point of the frame between the door and the side panel to the outer edge of the side panel frame.
Measure as above for the main door. For the top light, measure from the center point of the frame between the door and the top light to the top of the door frame. This gives you the transom drop for the top light.
These instructions are provided to assist you in measuring for a new door and frame. If you have any uncertainties, please feel free to contact us, we will be happy to help you.
Measure both the height and width from the OUTSIDE of your home. Always measure the exact brickwork opening, not the old frame or door currently installed.
Take measurements from brick to brick in at least three different places and subtract 10mm from both the final height and width measurements to allow for a 5mm fitting allowance around the new frame. This allowance will help the new frame sit plumb and square within the opening. Packers and silicone will be required to secure the frame into place and fill any gaps.
Measure brick-to-brick at three points: top, middle, and bottom of the opening. Use the smallest measurement. Deduct 10mm from this measurement.
Measure brick-to-brick at three points: left, middle, and right of the opening. Use the smallest measurement. Deduct 10mm from this measurement.
Measure as above for the main door. For the side panel, measure from the center point of the frame between the door and the side panel to the outer edge of the side panel frame.
Measure as above for the main door. For the top light, measure from the center point of the frame between the door and the top light to the top of the door frame. This gives you the transom drop for the top light.