Residential Doors Upminster


Long established and a trusted member of our Watford Community, here at Harp Windows we consistently aim to deliver premium quality products with a smooth and stress free installation process. Over the years, we’ve worked hard to build a respected reputation for professional integrity, efficient customer service and value for money. We are fully endorsed as a WHICH Trusted Trader and are Hertfordshire Trading Standards Approved. Discover more about us below, and get in contact with us for your quotation.


Customer satisfaction is our priority, and we will do everything we can to guarantee that you are delighted with your beautiful new door. Our Gerda doors are fitted fully guaranteed, together with an Insurance Backed Warranty from the Consumer Protection Association. We are FENSA registered and Checkatrade members since 2014, so you can have complete peace of mind when you choose us for your residential Gerda door installation.

Based in Watford, we install across Hertfordshire, Buckinghamshire, Middlesex, North West London and beyond, including St Albans, Harpenden, High Wycombe, Beaconsfield, Amersham, Gerrards Cross, Harrow, Uxbridge, Denham, Iver, Chorleywood, Northwood, Pinner, Stanmore, Bushey, Aldenham, and more.


Harp Windows Showroom
Aluminium Doors Watford


Harp Windows is small, local and family run, manufacturing and installing top performance windows and doors since 1989. Over our long career within the industry, we have developed our expert team to provide a professional and courteous service, fully committed to your requirements.

Our extensive product range has been chosen for its long lasting performance, design and manufacturing excellence and stylistic good looks. Our contemporary Gerda door range offers a comprehensive choice of entranceway solutions, combining steel and aluminium with innovative aesthetics and hardware. A cut above the rest – these doors provide superb levels of protection from both weather and intrusion, with industry leading locking systems for all-round security.

Aluminium Doors Watford prices


Beautifully styled in contemporary cutting edge designs, we are very excited to introduce our Gerda range of doors to our Watford showroom, including Gerda OTIMA, Gerda THERMO PREMIUM, Gerda THERMO PRIME and Gerda ALTUS.

All ranges are available in a wide variety of colour finishes and hardware options, allowing you to create the perfect residential front door for your home.

Gerda doors are manufactured from high quality steel and aluminium. Constructed with long term energy efficiency in mind, they can be easily recycled and are the perfect carbon neutral solution. Each door series comes with exceptionally low U-values and offers excellent thermal ratings, keeping your home warm and cosy all year round.

No matter which of the Gerda door series you choose, our comprehensive aftersales service will ensure your installation is as perfect as possible. A Gerda door is a valuable investment to keep your home safe, secure and energy efficient.

Aluminium Door prices Watford


Ready to start upgrading your home with our gorgeous range of Gerda doors? Then please call us or email us today to get started!

• Call our Watford showroom on (01923) 231111
• Email us at

No matter the style or series you are after, our expert team is more than happy to help you create your stylish new-look home. Book your visit to our Watford showroom to see our Gerda doors display in action – we look forward to seeing you soon!

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Harp Windows Showroom

Contact Details

91-93 St Albans Rd, Watford, WD17 1UL


  • Monday: 10:00am - 15:00pm
  • Tuesday: 10:00am - 15:00pm
  • Wednesday: 10:00am - 15:00pm
  • Thursday: 10:00am - 15:00pm
  • Friday: 10:00am - 15:00pm
  • Sat/Sun: 10:00am - 14:30pm, Sun: CLOSED

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