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Built for Performance and Style
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.
Colours and Finishes
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.
White
Red
Poppy Red
Oak
Grey
Green
Duck Egg
Dark Wood
Cream
Chartwell Green
Blue
Black
Black Brown
Secure 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.
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Colours and Customisation
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:
- Decorative Glass Panels: Single or double-sided options with Georgian bars, bevelled edges, or coloured lead.
- Side Panels & Top Lights: Full-height or half-height glazed sections.
- Premium Accessories: Handles, knockers, letterplates, and hinges in a variety of finishes.
Security & Durability
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:
- Multi-Point Locking System: High-security hook and roller locks secure at multiple points.
- Reinforced Steel Subframe: Adds rigidity and prevents forced entry.
- Toughened Safety Glass: Glazed units meet or exceed PAS24 and Secured by Design standards.
Optional security upgrades, such as anti-snap cylinders and hinge bolts, are available.
Energy Efficiency
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.
Low Maintenance
Enjoy the authentic appearance of wood without the upkeep. Our GRP finish:
- Retains its vibrant colour without repainting.
- Withstands UV exposure, moisture, and temperature fluctuations.
- Cleans easily, simply wipe with a damp cloth and mild detergent.
Installation & Guarantee
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.
Request a Free Quote
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.
Frequently Asked Questions
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.
Visit Our Lincoln Showroom
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.
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What Our Customers Say
Read real reviews from happy homeowners.
We asked Cliffside to replace our old conservatory including new foundation’s. We chose the solid roof option from Lela and had the interior plastered and...
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We have used cliffside for a while, they carry out all our repairs and new windows/doors on the rental properties, we have found the fitting...
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Martin & Co Lincoln
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Had new windows installed, brilliant customer service they made everything very easy and quick 10/10 would recommend to everyone.
Georgia Hancock
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I just had a new door with windows fitted by Cliffside Windows and extremely happy inside and out - a light-filled hallway and fantastic curb...
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Sarah Watson
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We asked Cliffside to replace our old conservatory including new foundation’s. We chose the solid roof option from Lela and had the interior plastered and the floor tiled, complete with under floor heating. All the staff a contractors were very professional and completed the works to a high standard. Communication with Cliffside was easy and any questions or issues we had were dealt with promptly.
We’re both absolutely delighted with our new room now being able to use it all year round. We would definitely recommend this company, thanks again Cliffside.
John C
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We have used cliffside for a while, they carry out all our repairs and new windows/doors on the rental properties, we have found the fitting staff to be helpful and polite when collecting keys and carrying out works. we would recommend them.
Martin & Co Lincoln
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Had new windows installed, brilliant customer service they made everything very easy and quick 10/10 would recommend to everyone.
Georgia Hancock
Via Google
I just had a new door with windows fitted by Cliffside Windows and extremely happy inside and out – a light-filled hallway and fantastic curb appeal! Thank you Cliffside Windows!
Sarah Watson
Via Google
