Flush Timber Casement Windows
Signature flush timber casement windows
Coluxor flush timber windows bring a touch of historic elegance to any architectural project. Designed to evoke the timeless grace of traditional British craftsmanship, they offer a seamless fit for rural cottage restorations, classic family home updates, and striking modern builds alike. Introduce enduring charm and a sophisticated silhouette to your property with a design rooted in English and Scottish heritage.
Double glazed timber windows with a 1.2 U-value
Our double-glazed wooden flush casements are up to 25% better than the new Part L 2022 building regulations, with U-values starting from 1.2 W/m²K.
We also offer triple-glazed and quadruple-glazed flush casement windows that are up to 50% and 70% better, with U-values starting from 0.8W/m²K and 0.6W/m2K.
Elegant flush casement designs
Flush timber casement windows are a highly sought-after choice that effortlessly complements both modern and traditional architectural styles.
Tailored Aesthetics
With an extensive selection of colors and glazing configurations, you can easily customize your flush casement windows to perfectly suit your project’s unique vision.
Advanced Engineering
Engineered for exceptional thermal performance, Coluxor windows achieve impressive U-values that maximize energy efficiency and help lower your utility bills.
Generations of Durability
Crafted from premium, sustainably sourced timber and built using expert joinery techniques, these windows boast a 60-year life expectancy and are truly built to last.
Uncompromised Security
Equipped with robust, multi-point locking handles, our flush casement windows deliver outstanding safety and ultimate peace of mind.
Homeowner Solutions ⟩⟩
Discover the ideal premium timber windows and doors to elevate your home renovation, extension, or self-build project. Coluxor combines exceptional craftsmanship with timeless design, allowing you to transform your vision into reality today.
Professional Solutions ⟩⟩
Discover how Coluxor’s exceptional timber windows and doors can flawlessly complement your commercial or residential trade project, regardless of scale or specification. Elevate your builds with the perfect blend of traditional craftsmanship and modern performance.
Choose flush casement windows that don’t cost the earth
Our flush casement windows are naturally renewable, carbon neutral, and made from only sustainably sourced FSC 100% certified softwood or hardwood. Our care and attention to our timber before and during the manufacturing process ensures a 50 year+ life span, 10-year warranty, and low maintenance for life.
Bespoke flush timber casements windows
We offer completely custom configurations and sizes spanning up to five meters and five lights wide, utilizing any blend of fixed and operational sashes. Choose from classic traditional or refined heritage moldings to match your architectural vision.
Design striking oriel or bay windows, or introduce dramatic architectural flair with swept heads and curved frames. Recreate timeless historical aesthetics including cottage, Georgian, horizontal, or marginal bar designs using our applied 16mm, 25mm, and 35mm glazing bars.
Incorporate an artistic, period-accurate statement into your glazing with traditional lead designs, including classic diamond, square, and elegant Queen Anne styles.
Premium timber selections
Every window in our collection is expertly crafted from certified, sustainably sourced engineered laminated timber. We provide the choice between premium redwood (Scots Pine) and durable hardwood (Dark Red Meranti), both backed by our identical, comprehensive warranties. While both offer exceptional performance, our hardwood features a more open grain pattern, delivering a beautifully textured aesthetic that is especially striking when finished with a timber stain.
Timber windows ideal for conservation areas
Specifically engineered for listed buildings and conservation areas, our Heritage profile flush casement windows seamlessly blend historic charm with modern performance. Available in both single and slimline double-glazing options, the 16mm slimline units feature internal glazing alongside a comprehensive drainage and ventilation system. Achieving an impressive U-value of 1.4 W/m²K and ensuring full compliance with current building regulations, they satisfy strict heritage requirements without compromising on comfort or thermal efficiency.
High performance timber flush casement windows
Achieve a quieter home with advanced acoustic insulation that reduces external noise by up to 42 dB. Our windows are equipped with double glazing and warm-edge spacer bars as standard, delivering U-values from 1.3 W/m²K to ensure full compliance with current Part L Building Regulations.
To guarantee lasting quality, Coluxor casements are certified under the BlueSky high-performance window scheme, providing reliable draft-proofing and weather protection in all conditions.
Why Choose Coluxor?
At Coluxor, we take great pride in providing friendly and professional service from the initial enquiry to the final order and installation. We offer expert guidance for both new construction and renovation projects, including historically significant listed properties, to ensure that your windows and doors not only meet performance standards and U values but also align with your preferred style, design, and color choices.
Colour
We precision-coat our flush casement windows in the factory using eco-friendly, water-based paints and stains designed for maximum longevity. Our extensive palette includes standard RAL Classic, RAL Design, NCS, and BS charts, alongside accurate colour-matching for premium designer ranges like Farrow & Ball, Earthborn, and Fired Earth.
For complete design control, you can choose a single uniform shade or a dual-color finish, allowing you to match your interior styling on the inside while complementing your external masonry on the outside.
RAL 9016
RAL 9003
RAL 9010
RAL 9001
RAL 1015
RAL 6019
RAL 3002
RAL 3005
RAL 5014
RAL 5013
RAL 5022
RAL 6005
RAL 7032
RAL 7015
RAL 7016
RAL 7040
RAL 7035
RAL 9005
RAL 7037
RAL 7030
RAL 7024
RAL 3011
RAL 6021
BS.10.B.17
BS.10.B.15
BS.10.C.31
French Green
Parchment
London Dust
Parlour
Smoke
Linen
RAL Colour
Glazing
Selecting the right glass is an essential part of any project. With our timber flush casement windows, you have the choice of single, SlimLine (narrow cavity), double, or triple glazing. To achieve your desired architectural style, you can incorporate applied glazing bars in 16mm, 25mm, or 35mm widths to form beautifully traditional or contemporary glass patterns.
For enhanced comfort, we provide acoustic double glazing that delivers exceptional sound reduction ratings ranging from 33dB to 42dB. Additionally, a diverse selection of obscure glass patterns is available to meet your privacy requirements, rated on a scale of 1 to 5, with 5 offering the maximum level of obscurity. To create a striking design feature, we also offer unique obscure, translucent coloured, and opaque painted glass options.
Frosted
Reeded
Chinchilla
Delta
Stippolyte
Arctic
Cotswold
Ironmongery
Security and operation are managed via a multi-point espagnolette locking system controlled directly by the window handle. You can select from our exclusive collection of four handle designs and decorative stays, bridging the gap between classic period styling and sleek modern aesthetics.
With up to 10 different color finishes available across the range, you can perfectly coordinate your hardware with your chosen paint or stain. Follow the link below to explore our complete selection of premium window ironmongery.
Brass Bulb End Handle
Bronze Bulb End Handle
Polished Chrome Monkey Tail Handle
Rumbled Brass Bulb End Stay
Satin Chrome Handle
Stainless Steel Round Bar Handle
Black Monkey Tail Handle
Polished Brass Handle
Polished Nickel Bulb End Handle
Rumbled Pewter Bulb End Handle
Satin Nickel Bulb End Stay
Security
Your peace of mind is our priority. Coluxor timber flush casement windows are fully Secured by Design accredited and third-party tested to comply with strict Part Q building regulations. Each window features multi-point espagnolette locking handles and is internally glazed as standard, preventing the glass panes from being removed from the outside.
For day-to-day safety and functionality, our casements are equipped with versatile easy-clean or egress friction hinges, secure night vents for protected ventilation, and built-in child safety restrictors.
Future-Ready Timber Casements
Engineered ahead of the Future Homes Standard, Coluxor double-glazed timber windows and doors easily surpass Part L building regulations, delivering impressive U-values from 1.3 W/m²K-a 7% improvement over standard guidelines. For even greater thermal efficiency, our triple-glazed options achieve exceptional U-values starting at just 0.8 W/m²K, outperforming regulatory requirements by a remarkable 43%.
Consciously Crafted Timber Windows
Invest in eco-friendly flush casement windows crafted exclusively from certified, responsibly sourced softwood or hardwood. Naturally renewable and carbon-neutral, our timber undergoes meticulous preparation and manufacturing to guarantee an exceptional 60-year+ lifespan. Backed by a 10-year warranty, Coluxor windows deliver enduring strength and low maintenance for a lifetime of worry-free performance.
Flush Casement FAQs
What is the difference between a flush and a lipped casement?
Flush casement sashes sit completely level and flat within the frame for a smooth exterior finish. In contrast, lipped (or stormproof) casements feature a sash that slightly overlaps the frame’s edge.
Do flush and lipped casements differ in weather performance?
Coluxor timber flush casement windows are engineered with advanced dual weather seals to eliminate drafts and provide superior protection against the elements. Furthermore, both design options feature adjustable compression hardware, allowing you to fine-tune the seals over time to maintain an airtight, highly resilient barrier.
What hinges do your casement windows come with?
Every Coluxor casement window is equipped with high-performance, easy-clean friction hinges as standard. This specialized hardware allows the window to open wide enough for effortless cleaning from the inside, while smoothly holding the sash securely in your desired open position.
Do I need a stay on my casement windows to hold them open?
No, window stays are not required. Coluxor casement windows are engineered with built-in easy-clean or egress friction hinges that reliably hold the sash in place at any opening angle. Additionally, both our traditional lipped and flush casements feature a secure night vent position, letting you safely ventilate your home without fully opening the window.
Do you offer mock sash casement windows?
Yes, we provide mock sash configurations across multiple operating styles. You can choose from traditional side-hung or top-hung (regency casement) designs, as well as highly versatile, inward-opening Tilt & Turn window systems to perfectly suit your architectural needs.
Do I require Part Q compliance on a casement window?
Approved Document Part Q applies strictly to new dwellings. It is a mandatory requirement if you are constructing a self-build property or executing a material change of use (such as converting a barn into a home). While standard home renovations or direct window replacements are exempt, prioritizing robust security is always recommended.
At Coluxor, we build exceptional security into our products as standard. Our windows can be specified with multi-point espagnolette locking systems and Neighbourhood Watch-approved, 3-star high-security cylinders to ensure maximum protection for your home.