At Cliffside Windows, we specialise in premium composite doors Lincolnshire homeowners trust to enhance curb appeal, improve security, and boost energy efficiency. Serving Lincoln, Grantham, Sleaford, Boston, and all of Lincolnshire, our family-run business brings over 50 years of local expertise to every project. Our qualified, FENSA-certified installers combine professional craftsmanship with friendly service tailored to the local climate and architectural styles.
Why Choose Cliffside for Composite Doors in Lincolnshire
- Half a Century of Experience: Established in 1970, Cliffside Windows has perfected composite door installations, ensuring expert advice and flawless workmanship.
- Insurance-Backed Guarantees: Every door comes with a FENSA registration and an insurance-backed guarantee, safeguarding your home retrofit for added peace of mind.
- Local Knowledge & Support: We understand Lincolnshire’s unique weather patterns and planning requirements, offering personalised guidance from initial survey to final fit.
- Transparent Pricing: We provide detailed, no-obligation quotes with clear breakdowns—no hidden fees.
Our Composite Doors Lincolnshire Range & Colours
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:
- White
- Rosewood
- Light Oak
- Cream
- Red
- Burgundy
- Blue
- Green
- Black
Each door features a lifelike grain effect that resists fading, blistering, and moisture ingress. 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 to maximise natural light.
- Premium Accessories: Handles, knockers, letterplates, and hinges in a variety of finishes.
Our expert team can advise on colour combinations that complement your brickwork, roof tiles, and garden aesthetics.
Design your Composite Door Now
Security & Durability
Cliffside’s 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 to meet specific insurance requirements.
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
Q: How secure are Cliffside’s composite doors?
A: Our doors combine a reinforced steel subframe, multi-point locking, and toughened safety glass, meeting PAS24 and Secured by Design standards and supported by an insurance-backed FENSA guarantee.
Q: Are composite doors energy efficient?
A: Yes. With a foam-filled core, low-E double glazing, and U-values as low as 1.4 W/m²·K, our composite doors reduce heat loss and help lower energy bills throughout the year.
Testimonials
We would have no hesitation at all in recommending Cliffside to anyone who is thinking of having replacement windows or doors.
“Delighted with the high standard of workmanship, care taken of property and kept up to date with work and why what was being done.
Time keeping could not have been better, a joy to have such courteous workmen who obviously enjoyed their work best I have experienced.
“Cliffside have fitted 18 windows, installed a large porch, a composite back door and french doors at my house. I have found them to be courteous at all times, the standard of workmanship is excellent.
“We are very pleased with our bay window, the workmen did a great job and were very obliging, and the finished product is second to none,
Thank you Cliffside Windows.
“We had five new windows and the answers to all of my questions were excellent. I have requested the same workmen when they come to fit a new door later this year.
