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Trusted Double Glazing Solutions in Lincolnshire
Cliffside Windows is an established glazing company with over 50 years of combined experience in manufacturing and installing high-quality double-glazed aluminium and uPVC products. Our family-run business prioritises exceptional craftsmanship, energy-efficient solutions, and customer satisfaction, serving residential and commercial clients across Lincolnshire. We specialise in windows, doors, conservatories, porches, and roofline products, offering a comprehensive service from initial consultation to expert installation and aftercare.

Our team of experienced professionals ensures every project meets the highest standards, supported by an insurance-backed guarantee and accreditations including FENSA and the Federation of Small Businesses. With a showroom in Dunston, we provide tailored solutions to enhance property aesthetics, security, and thermal performance, backed by decades of industry expertise and a commitment to innovation.
Services
Windows Doors Conservatories Porches Roofline Double Glazing Secondary Glazing Composite Doors Conservatory Roof Replacement uPVC & Aluminium
Highlights and features
  • We have over 50 years of combined experience in double glazing solutions.
  • Our team of experienced craftsmen ensures high-standard installations.
  • We offer an insurance-backed guarantee on all FENSA installations.
  • Our products meet CE marking standards for quality and safety.
  • We provide tailored solutions for residential and commercial properties.
Associations and certifications
  • FENSA
  • Federation of Small Businesses
  • CE Marked Products
What people say
Brilliant customer service Professional and completed works to high standard 10/10 would recommend Fantastic curb appeal Delighted with new room
Services
Windows
Energy-efficient uPVC and aluminium windows designed for thermal performance and security. Available in casement, sash, bay, and tilt-and-turn styles, with customisable colours and finishes to suit traditional or modern properties. Installed with multi-point locking systems for enhanced safety.
Doors
Durable uPVC, composite, and aluminium entrance doors offering security and style. Options include French, patio, and bifold doors with insulated glazing and robust locking mechanisms. Customisable with decorative glass, woodgrain effects, and colour-matched finishes for aesthetic and functional upgrades.
Conservatories
Made-to-measure conservatories in Victorian, Edwardian, and Sun Lounge styles. Features include solar glass roofing, thermally efficient frames, and insulation for year-round use. Ideal for expanding living space while enhancing natural light and property value.
Porches
Stylish, insulated uPVC porches with multi-point locking systems for security and weather resistance. Available in bespoke designs to complement property architecture, improving kerb appeal and providing sheltered entryways with low-maintenance durability.
Roofline
Durable uPVC fascias, soffits, and guttering in white or black finishes. Designed to prevent water damage, reduce maintenance, and enhance roof aesthetics. Resistant to warping and rot, ensuring long-term protection and improved property insulation.
Questions
What areas do Cliffside Windows serve?
We operate across Lincolnshire, including Lincoln, Grantham, Sleaford, Boston, and surrounding areas.
Do your windows and doors come with guarantees?
All FENSA-registered installations include an insurance-backed guarantee for added peace of mind.
Can I customise my windows and doors?
Yes, we offer customisation in colours, finishes, glazing options, and hardware to match your property's style.
Do you offer financing options?
We provide flexible finance packages, including 0% APR for smaller projects and competitive rates for larger installations.
Are your products energy efficient?
Our double-glazed units and thermally efficient frames reduce heat loss, lowering energy bills and improving comfort.
How do I book a consultation?
Contact us via phone or our website to arrange a free, no-obligation quote and discuss your project requirements.
Reviews (1)
Brian Hicks
Jan 02, 2022 Report
I had windows fitted by this company about 15 years ago and they have NOT stood the test of time. They never fitted properly from day 1 and you could see gaps between the windows and frames. The frames were warped and some of the seals didn't even touch with the windows. When I eventually complained to a woman in the Lincoln office she behaved as though it was my fault and begrudgingly sent someone to have a look AFTER DEMANDING MONEY FOR AN INSPECTION , but someone came and replaced some of the rubber seals, but if the windows are not properly aligned with the frames in the first place then this