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Composite doors combine strength, insulation, and design flexibility into one low-maintenance solution. Their dense cores and durable outer layers resist warping, fading, and daily wear, making them a practical choice for any entrance.
Customisation is at the heart of our composite doors. Choose from a variety of styles, decorative glass panels, side panels, and top lights to suit your property. Premium handles, knockers, and letterplates add the finishing touch.
Our composite doors come in a wide range of colours, from bold reds and blues to heritage greens and sleek greys. Woodgrain-effect finishes offer the look of timber without the upkeep.
Whether you want to make a statement or keep things classic, there’s a colour and texture to suit your home.
Our composite doors are built with high-strength cores and advanced, hook and roller multi-point locking systems to provide security and peace of mind. Each installation is completed by our FENSA-registered fitters and backed by a comprehensive guarantee.
Reinforced frames, toughened safety glass, hinge bolts, and anti-snap cylinders help improve protection further.
Windows, Doors & Conservatories
Our selection of composite doors combines beauty with performance. With 9 striking, colourfast finishes, you can achieve a bespoke look that complements both period cottages and modern builds. We offer our doors in White, Rosewood, Light Oak, Cream, Red, Burgundy, Blue, Green, or Black.
To further customise your entrance, choose from:
Our composite doors are engineered for robust performance. A foam-filled insulated core is encased in a moulded GRP (glass-reinforced plastic) skin, delivering exceptional resistance to warping, rot, and extreme weather. Each door incorporates:
Optional security upgrades, such as anti-snap cylinders and hinge bolts, are available.
Achieve year-round comfort with our thermally efficient composite doors. The combination of a solid foam core and advanced double glazing reduces U-values to as low as 1.4 W/m²·K, minimising heat loss, eliminating cold spots, and lowering your heating bills. Low-emissivity coatings and argon-filled cavities further enhance insulation performance.
Enjoy the authentic appearance of wood without the upkeep. Our GRP finish:
Our accredited fitters provide a comprehensive survey to ensure precise measurements and a perfect fit. As FENSA members, we guarantee all installations meet building regulations, backed by an insurance-backed warranty. Our installers ensure the site is left clean and tidy, and we offer a 12-month workmanship guarantee in addition to manufacturer guarantees. Should any issues arise, our local support team is on hand to assist.
Ready to upgrade with premium composite doors? Contact Cliffside Windows today for a free, no-obligation quote. Call us on 01526 320534 or complete our online form to discuss your requirements. Or visit our Dunston showroom to view door samples in person and discuss your project with our specialists. We’ll guide you through style, security, and energy options to find the ideal solution for your Lincolnshire home.
Yes, composite doors are designed with energy efficiency in mind. Their dense insulated cores and tightly sealed frames help reduce heat loss, keeping your home warmer and potentially lowering energy bills.
Our composite doors come in a wide range of colours, glazing choices, panel designs, and decorative hardware. If you’re unsure where to start, try our online door designer to visualise the perfect look for your home.
Absolutely. Composite doors offer the same security, insulation, and durability whether they’re installed at the front, back, or side of your property.
With minimal maintenance, a high-quality composite door can last 30 years or more. They’re built to withstand daily wear, weather exposure, and temperature changes without warping or fading.
Composite doors are low maintenance, all they need is an occasional cleaning.
See our products up close at our Lincoln showroom. It’s the perfect place to explore styles, ask questions, and chat with our friendly team about what’s right for your home.