Enhance your home with durable, energy-efficient uPVC windows that reduce heating costs by up to 30% and require minimal maintenance.
uPVC windows are the IN’s most popular window type, made from unplasticised polyvinyl chloride frames with double or triple glazed sealed units. Average cost: £350–£800 per window installed. They offer A+ energy ratings, require virtually no maintenance, and last 20–30 years. Harrington Windows installs bespoke uPVC windows across London, Hertfordshire, Essex, and Cambridge with a 10-year guarantee.
Introduction
Designed for modern homes and lifestyles, our premium uPVC windows combine exceptional durability with outstanding energy efficiency and security features.
Each window is custom-manufactured to your exact specifications, offering superior thermal insulation, enhanced security, and a wide range of styles and finishes to complement your home.
Multi-chambered profiles lock in heat and reduce energy loss
Advanced multi-point locking systems for complete peace of mind
Extensive range of styles, colours, and finishes to match any aesthetic
Minimum expected durability
Average heating cost reduction reported by customers
Customer satisfaction rate across installations
Full parts and labour warranty
Average customer review
Limited time offer for new customers. Transform your home with our premium uPVC windows.
*Terms and conditions apply. Offer valid until end of month.
Our uPVC windows combine premium materials with precision engineering to deliver exceptional performance for decades.
Multi-point locking systems and reinforced frames for complete peace of mind
A+ rated windows that help reduce energy bills by up to 30%
Easy to clean and never needs painting or treating
Excellent protection against the elements with superior sealing
Every Harrington uPVC window is fabricated with premium-grade profiles and hardware to deliver outstanding durability, weather resistance, and day-to-day ease of use.
Engineered for Excellence
Our uPVC windows are engineered with advanced materials and techniques to provide superior performance and aesthetics.
Advanced uPVC profiles with multiple internal chambers for superior thermal insulation and strength.
High-quality fusion-welded joints creating seamless, weather-tight corners for maximum durability.
Customisable frame styles, opening configurations, and decorative features to complement any home.
Every window is built with security in mind, from reinforced frames to police-approved locking systems.
uPVC-compatible locking mechanisms that secure windows at multiple points around the frame
Internal galvanised steel reinforcement in uPVC profiles for enhanced structural integrity
Safety glass options perfectly paired with uPVC frames for maximum security
uPVC windows that meet or exceed police-approved security certification standards
Our uPVC windows achieve exceptional thermal performance, helping to reduce energy bills and create a more comfortable living environment throughout the year.
Multiple internal chambers provide excellent thermal insulation
Double or triple glazing with warm edge spacer technology
Multiple seals eliminate draughts and water ingress
Reflects heat back into your home during winter
Choose from classic whites, contemporary greys, and authentic woodgrain finishes. Dual-colour options allow different interior and exterior palettes
Select from premium Pilkington decorative glass styles to achieve the perfect balance of privacy and light.
Delicate pattern with high privacy
Bold contemporary design with high obscurity
Wave-like texture with medium privacy
Modern, pixelated design for a distinctive look
Traditional handcrafted appearance
Decorative floral pattern to diffuse light
Elegant leaf motif with balanced opacity
Classic textured surface with high privacy
Popular stippled effect for excellent coverage
Nature-inspired design with moderate obscurity
Seasonal leaf pattern with warm character
Pebbled finish ideal for bathrooms
Decorative floral design with premium feel
Fabric-like finish offering soft light diffusion
A Seamless Experience From Start to Finish
Our local experts visit your home to understand requirements, take precise measurements, and provide tailored advice.
We prepare a custom window design that suits your home’s style and deliver a clear, no-pressure quote.
Your uPVC windows are precision-manufactured using quality materials and advanced production techniques.
Our skilled fitters install your uPVC windows with minimal disruption, typically taking just 1-2 days.
We conduct a thorough inspection and walkthrough, backed by comprehensive guarantees and aftercare.
We take precise measurements of your existing windows and discuss style, colour, and functional preferences. Our team assesses your property’s needs and explains the best options available.
Following the consultation, we prepare detailed CAD drawings and a transparent, itemised quote. You’ll have time to review and request adjustments before proceeding.
Once approved, we craft your windows in our state-of-the-art facility. Each component is engineered to exact specifications and quality checked throughout production.
The installation team works efficiently and respectfully, removing old windows and fitting new ones with minimal disruption. We protect your home throughout and tidy as we go.
After installation, we demonstrate operation and cleaning, complete a detailed quality check, and activate your guarantees. We’re on hand for any future support.
Your peace of mind is our priority
Our uPVC frames are guaranteed to maintain structural integrity for 30 years.
Every installation includes a full 10-year workmanship warranty.
All guarantees are insurance-backed by trusted UK providers.
In the unlikely event of an issue, we guarantee a 48-hour callout.
Everything you need to know about our uPVC windows
Our uPVC windows are built to last 30+ years with minimal maintenance. They use high-grade materials and comprehensive guarantees for peace of mind.
Yes, our uPVC windows achieve an A+ energy rating with multi-chambered profiles and high-performance glazing to reduce heating costs by up to 30%.
They come with multi-point locking systems, reinforced frames, toughened glass options, and can meet Secured by Design standards.
No, uPVC windows are very low maintenance. They only require occasional cleaning and never need painting or treating. Frames won't rot, warp, or corrode.
We offer a wide range of colours and finishes, including woodgrain effects and dual-colour options to match interior and exterior schemes.
We provide guarantees covering frames (30 years), glazing units (10 years), hardware (10 years), and installation (10 years), all insurance-backed.
Get started with a free consultation and quote. Our experts are ready to help you find the perfect uPVC windows for your home.
