Business Details
Your Trusted Partner for Windows & Doors in Hertfordshire
Harpenden Windows is a family-run business with over 40 years of experience in the double glazing industry, serving Hertfordshire and surrounding areas. Established as a trusted name in home improvement, we specialise in manufacturing and installing high-quality uPVC and aluminium windows, doors, and roofline products. Our commitment to excellence is reflected in our FENSA registration, CE-marked products, and a reputation built on customer satisfaction. We pride ourselves on offering bespoke solutions tailored to individual needs, with a focus on energy efficiency, security, and aesthetic appeal.Our team of skilled professionals ensures every project is completed to the highest standards, backed by comprehensive guarantees. With over 90% of our work coming from recommendations, we prioritise transparency, ethical trading, and exceptional service. Our Harpenden-based factory allows us to maintain quality control while providing competitive pricing without hidden fees. We are dedicated to enhancing homes with innovative products like the Residence Collection, bi-fold doors, and energy-efficient windows, ensuring long-term value for our customers.
Services
uPVC Windows
Bi-Fold Doors
Aluminium Patio Doors
Flush Casement Windows
Lantern Roofs
Residence Collection
Energy-Efficient Solutions
Security Doors
Custom Glazing
Roofline Products
Highlights and features
- 40 years of successful trading in Hertfordshire
- Family-run local business with ethical practices
- FENSA-registered installations for compliance assurance
- No-pressure sales approach with transparent pricing
- Expert fitting teams with comprehensive product guarantees
Associations and certifications
- FENSA
- CE Marking
Services
uPVC Windows
Our uPVC windows combine modern technology with traditional aesthetics, offering energy efficiency and low maintenance. Available in flush casement, tilt-and-turn, and sash designs, they enhance thermal performance while preserving period charm. Customisable with A+ energy ratings, night vents, and decorative glass options, these windows are ideal for both contemporary and heritage properties.
Bi-Fold Doors
Aluminium bi-fold doors create seamless indoor-outdoor living spaces with slim sightlines and high security. Featuring multi-point locking systems and thermal efficiency down to 1.1W/mK, they are available in dual-colour finishes. Tailor configurations to suit your space, with low thresholds for accessibility and triple glazing for enhanced insulation.
Aluminium Patio Doors
Reynaers-sourced aluminium patio doors offer durability, security, and sleek design. Their stainless steel tracks ensure smooth operation, while double or triple glazing achieves U-values as low as 1.1W/mK. Ideal for modern homes, these doors maximise natural light and come with Secured by Design accreditation for peace of mind.
Lantern Roofs
Custom lantern rooflights flood interiors with natural light, enhancing both traditional and contemporary spaces. Constructed with thermally efficient profiles and available in multiple colours, they feature low-maintenance durability and acoustic insulation. Each design is made-to-measure for flat roofs, adding architectural appeal and property value.
Residence Collection
The Residence Collection offers premium flush casement windows and doors with authentic timber aesthetics and uPVC benefits. These products feature A++ energy ratings, multi-chambered profiles for insulation, and a wide range of finishes. Designed for heritage properties, they combine security, durability, and classic elegance without the upkeep of wood.
Questions
What types of windows and doors do you offer?
We provide uPVC and aluminium windows, bi-fold doors, patio doors, lantern rooflights, and the Residence Collection timber-alternative range.
Are your products energy efficient?
Yes, all products meet A+ energy ratings, with options for triple glazing and U-values as low as 1.1W/m²K for optimal thermal performance.
Do you offer guarantees on installations?
We provide comprehensive guarantees covering both products and installations, reflecting our confidence in quality and durability.
Can I customise my windows and doors?
Yes, all products are made-to-measure with options for colours, finishes, hardware, and configurations to suit your property's style.
Are you FENSA registered?
Yes, we are FENSA-registered, ensuring compliance with building regulations and high standards of workmanship.
Do you serve areas outside Harpenden?
We operate across Hertfordshire and surrounding regions, including Watford, Hemel Hempstead, and St Albans.
Reviews (3)
Annie Young
Jun 05, 2018
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We have had windows fitted by these guys before over the years and happy with those but really wanted to thank the man that helped me change my flat tyre this morning outside their office!
Matt Walker
Apr 28, 2018
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Harpenden Windows provided a flawless service at every stage of the negotiations and the installation. I was delighted with the efficiency and courtesy of all those involved in the work. The fitted composite doors installed not only look great but also feel incredibly secure and were delivered at reasonable cost.
Daisy Lewis
Dec 07, 2017
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Great service from consultation through to completion. Both Aaron and Paul were really helpful, talking through all the options and giving recommendations based on their experience. We are really happy with the result - traditional looking windows, with all the benefits of new ones! We will definitely be using them again when we get on to our extension.
