Sliding Sash Windows
Traditional timber sliding sash windows
Coluxor timber sliding sash windows flawlessly capture classic period aesthetics while delivering the exceptional thermal efficiency essential for modern residences. Whether you are rejuvenating a Victorian townhouse, an Edwardian cottage, or a Georgian terrace, these profiles are tailored to mirror your property’s distinct historic charm seamlessly. This faithful architectural styling is achieved without sacrificing contemporary security benchmarks or advanced weatherproofing, blending timeless elegance with current performance standards.
Double glazed timber windows with a 1.2 U-value
Our double-glazed wooden sash windows 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 sash windows that are up to 50% and 70% better, with U-values starting from 0.8W/m²K and 0.6W/m2K.
Premium timber sliding sash windows
Coluxor timber sliding sash windows infuse any property with authentic charm and architectural character, flawlessly replicating historic designs while maintaining elite thermal efficiency.
Versatile Operating Mechanisms
To ensure the perfect mechanical match for your project, our sliding sash windows are available in two distinct configurations:
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Cords and Weights: Utilizing a traditional pulley system for ultimate historical accuracy.
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Spiral Balance: Utilizing modern tensioned springs for a smooth, reliable operation within a sleeker frame profile.
Authentic Heritage Detailing
Recreate faithful period aesthetics down to the finest detail. Our comprehensive range of architectural features includes slim profiles, authentic timber-only parting beads, traditional baton rods, and decorative sash horns.
Advanced Thermal Efficiency
Coluxor timber sliding sash windows can be specified with high-performance double or triple glazing. Both options fully comply with the latest Part L building regulations, delivering exceptional U-values that significantly reduce energy loss.
Acoustic Comfort and Performance
In addition to their superior insulation properties, our windows engineered with advanced sealing technology offer excellent noise reduction capabilities, keeping external ambient sounds firmly outside your home.
Choose sliding sash windows that don't cost the earth
Our sliding sash 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.
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.
Fully custom timber sliding sash windows
We manufacture completely bespoke sizes and configurations, with individual sash windows capable of spanning widths up to 1.3 meters and heights up to 2.7 meters. You can combine fixed and opening sashes in any arrangement, utilizing your choice of contemporary, traditional, or heritage mouldings to match your property’s architectural era. To achieve your desired period aesthetic, you can incorporate applied 16mm, 25mm, and 35mm glazing bars to flawlessly recreate classic configurations such as horizontal, cottage, Georgian, or marginal bar designs.
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.
High-performance thermal sash windows
Engineered to lower energy consumption, our timber sash windows fully align with the current Part L Building Regulations to offer superb insulation. Standard specifications include double-glazed units outfitted with thermal warm-edge spacers, yielding impressive U-values from 1.3 W/m²K. For sustainable developments or rigorous eco-retrofits, we also provide specialized triple glazing configurations that drive U-values down to a remarkable 0.8 W/m²K, keeping interior spaces comfortable while minimizing heat retention loss.
Spiral balance timber sliding sash windows
The spiral balance configuration is our most widely specified sliding sash window, utilizing modern, maintenance-free tension springs that are semi-concealed within the internal frame channel.
To ensure these mechanical components complement your chosen aesthetic, the balance casings can be color-matched in white, brown, black, or cream. For ultimate historical accuracy, they can also be completely concealed within the timber framework, ensuring the window retains its authentic, uninterrupted period styling while delivering smooth, effortless operation.
Traditional cords and weights sliding sash windows
Embodying the true pinnacle of heritage craftsmanship, our cords and weights sliding sash windows feature authentic lead or steel counterweights coupled with high-tensile nylon cords. This classic system glides effortlessly across precision-engineered, draught-proof axle pulleys, ensuring historical accuracy while delivering a secure barrier against harsh weather.
To blend timeless styling with practical modern living, this traditional profile includes a clever tilt-to-clean mechanism. It also incorporates built-in internal access panels to the weight pockets, allowing you to perform routine maintenance quickly and easily from inside the property without altering the surrounding masonry or interior plaster.
Replicating original window features
To help you flawlessly mirror the historic character of your property, our profiles can be customized with a comprehensive suite of traditional joinery features. We offer delicate slim frames, authentic timber-only parting beads, classic timber staff beads, and matching baton rods, alongside protective travel stops for a completely genuine appearance. For ultimate historical precision, you can specify deeper bottom sash rails and select from seven distinct styles of decorative sash horns to replicate classic designs from any era. This attention to detail is completed by our applied 16mm, 25mm, and 35mm glazing bars, enabling the faithful creation of timeless horizontal, cottage, Georgian, or marginal bar patterns.
Security
Your safety and peace of mind are paramount, which is why our timber sliding sash windows are engineered to meet the most stringent security standards. Coluxor sash windows hold the prestigious Secured by Design accreditation, the official UK police flagship initiative for crime prevention, and have undergone rigorous third-party testing to achieve full compliance with Part Q of the Building Regulations. This independent certification ensures your home is protected by proven, formidable resistance against forced entry.
Period-accurate Historical Detailing
Our expansive selection of custom design options allows you to seamlessly complement the elegance of the classical era. We specialize in intricate, historically accurate geometries, including curved head frames, swept heads, curved sashes, and even authentic curved glass. To complete the period aesthetic, we offer applied or dividing glazing bars in multiple widths, enabling the exact replication of any traditional horizontal, Georgian, or decorative bar pattern required for your project.
Certified noise reducing sash windows
We provide the only certified noise-reducing timber sash windows on the market capable of lowering overall environmental sound by up to 42dB. Engineered to create a quiet sanctuary, the units utilize specialized acoustic glazing that carries an individual rating of up to 47dB. This advanced sound insulation is highly effective at filtering out heavy city traffic, sirens, and disruptive urban disturbances, ensuring a peaceful indoor environment.
Authentic mock sash casement windows
Our contemporary lipped casement collection features both sliding sash look-alikes with a side-hung opening and regency style top-hung configurations. These mock sash designs provide the perfect solution if you want the classic aesthetic of a traditional sash window but face installation constraints due to narrow structural reveals. In these specific structural settings, a standard sliding sash window cannot provide the clear opening required to meet UK fire escape regulations, making our mock sash casements the ideal, compliant alternative.
Future-Ready Timber Sash Windows
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 sliding sash 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.
Colour
Every sliding sash window is factory-finished with eco-friendly, water-based paints and stains formulated for long-term weather resistance. You can select your finish from extensive RAL Classic, RAL Design, NCS, and BS color charts, or opt for an exact match to designer palettes from Farrow & Ball, Earthborn, or Fired Earth.
With both single and dual-color options available, you have the freedom to coordinate the external frame with your property’s brickwork or rendering while matching the internal finish to your interior decor.
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
Glazing is a critical component of any window project, directly affecting thermal efficiency, sound insulation, and aesthetics. Our timber sliding sash windows can be specified with traditional single glazing, narrow-cavity SlimLine glazing, standard double glazing, or maximum-efficiency triple glazing. To achieve your desired architectural layout, you can incorporate applied glazing bars in widths of 16mm, 25mm, or 35mm to recreate authentic period grids or sleek modern patterns.
If external noise is a concern, we offer specialized acoustic double glazing capable of delivering sound reduction ratings between 33dB and 42dB. For bathrooms, front entrances, or overlooked elevations, a variety of obscure privacy glass patterns are available with obscurity ratings from 1 to 5, alongside striking translucent colored and opaque painted glass options to create a unique design feature.
Frosted
Reeded
Chinchilla
Delta
Stippolyte
Arctic
Cotswold
Ironmongery
Coluxor timber sliding sash windows are outfitted with premium architectural ironmongery, featuring traditional fitch fasteners, elegant hook lifts, and robust opening restrictors as standard. You can tailor the locking mechanics to your exact aesthetic and security preferences by selecting from two classic fitch fastener variants: the sleek, standard Fitch Lock or the traditional threaded screw-down Brighton Fastener.
To ensure child safety and controlled ventilation, we offer three distinct window restrictor designs, including the key-operated vent lock, the streamlined push-and-twist vent lock, and the automatically engaging angel vent lock. For our cords and weights configurations, the heritage styling is completed with authentic round-end axle pulley wheels, with options to further customize operation using external D-handles and internal ring lifts. Every hardware component is available in an array of classic metallic finishes, allowing you to establish a cohesive look across your property. Click the link below to explore our complete catalog of sliding sash window ironmongery.
Antique Brass
Bronze
Polished Chrome
Rumbled Brass
Satin Chrome
Black
Brass
Satin Chrome
Rumbled Pewter
Satin Nickel
Sliding Sash FAQs
How do sliding sash windows operate?
The window sashes slide vertically within the frame to open and close. We offer two distinct operational mechanisms to suit your project. The first is our traditional cords and weights option, which utilizes a classic weight-and-pulley counterbalance system. The second is our modern spiral balance system, which employs a tensioned, coiled spring mechanism discreetly housed inside an encased, color-matched tube to seamlessly blend with your window’s finish.
Do you offer traditional sliding sash windows?
Yes, we provide authentic sliding sash windows featuring either a traditional cords and weights system or a modern spiral balance method of operation. To ensure an exacting historical match, our designs are specified with period-accurate traditional or heritage style mouldings and glazing bars, making them the perfect choice for sensitive window replacements and property renovations within conservation areas.
What is the difference between spiral balance and cords and weights?
The fundamental distinction lies in their internal opening mechanisms. A traditional cords and weights system requires wider outer frame jambs to accommodate the lead or steel counterweights hidden within the window lining. In contrast, spiral balances utilize compact spring tension, allowing for a slimmer frame profile. Regardless of which mechanical option you select for your property, both configurations are backed by the exact same comprehensive product warranty.
Do you offer a tilt facility on your sash windows?
We choose not to offer a tilt facility on our sliding sash windows. Tilting mechanisms typically rely on non-compressing brush seals that can look unattractive and degrade the window’s overall weather and thermal performance over time. To provide a superior alternative, our traditional cords and weights configuration can be specified with an integrated easy-clean system, which allows the bottom sash to safely swing inwards like a side-hung casement for effortless maintenance from inside the room.
Can I have hardwood cills on softwood frames?
Although we can easily supply hardwood cills paired with engineered redwood frames, it is rarely required. Both our premium hardwood and high-performance redwood options are manufactured to the same exacting standards, utilizing defect-free, engineered timber that is thoroughly preservative-treated and factory-finished. Because every single component undergoes this meticulous process using industry-leading Teknos advanced coating systems, both materials are backed by the exact same comprehensive guarantee. This exceptional level of protection allows us to offer a full 30-year warranty against rot and fungal decay across our entire product range, regardless of the timber combination.
Do I have to opt for sash horns?
No, decorative sash horns are entirely optional. If you do wish to include them to match a specific period aesthetic, we offer seven distinct styles to choose from to complement your property’s character perfectly.
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.