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Bespoke lipped timber casement windows by Coluxor
Bespoke lipped timber casement windows
Mastering the UK Classic: Timber Lipped Casement Windows
Known colloquially as “storm-proof” windows, the lipped casement remains a British favorite thanks to its overlapping sash, which provides superior weather protection. Coluxor’s timber versions elevate this practical design with decorative edging that softens the window’s profile. With two distinct moulding options—Pencil Round for a sleek, contemporary look or Ovolo for a traditional feel—our windows are engineered to complement everything from modern apartments to heritage homes.
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.
Sliding Sash Window Features
The British Classic: Timber Lipped Casement Windows
The “stormproof” lipped casement remains the UK’s most sought-after window style for a reason. Its unique overlapping sash provides an elite seal against the elements, making it a perfect fit for any home, from rustic cottages to urban new-builds.
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Bespoke by Design: Tailor your windows with an extensive palette of finishes and configurations to match your unique architectural vision.
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Thermal Excellence: Crafted from premium, sustainably sourced timber, our windows act as a high-performance natural insulator, slash energy bills, and keep your home cozy year-round.
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A Lifetime Investment: Using only the finest materials, our casements are engineered for longevity. We stand by our craftsmanship with a comprehensive 10-year warranty.
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Uncompromising Security: Your peace of mind is our priority. Every window is Secured by Design and Part Q certified, offering a robust defence against intruders.
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.
Replicating original features
Certified noise reducing sash windows
At Coluxor, we employ advanced technologies to seamlessly merge the finest qualities of traditional window designs with modern solutions. Our windows are available in spring and lead-balanced varieties. Irrespective of your choice, our London-based company ensures that all our products are manufactured using the highest quality softwood and hardwood sourced sustainably. The distinctive design of our timber sash or casement windows enables us to achieve an elegant and timeless style while incorporating remarkable, innovative technological features such as draught-proofing, Secured by Design fasteners, and Angel Ventlock®. These elements not only enhance safety but also improve the efficiency of our windows, creating a comfortable environment for your home or establishment.
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.
Add a splash of colour
Handles & locks