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    01923 231 111


Industry-acclaimed A+ rated windows and doors – as standard.

January 21, 2016 by harp_admin

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OUR ENERGY EFFICIENT A+ RATED REHAU uPVC WINDOWS AND DOORS GUARANTEE TO KEEP YOUR HOME WARM THIS WINTER! Here at Harp, we are great believers in quality, and with our standard Rehau uPVC windows and doors, you get just that. Our REHAU range of windows and doors offers better security features, more style choices and exceptional energy efficiency. Every product is made bespoke to your requirements, and is tested, certified and manufactured to the very highest standards for proven quality and peace of mind.

  1. A BSI-certified quality manufacturing system,
  2. Police approved security features as standard,
  3. Exclusive designs, a wider style range and more additional colour options are now available.
800 Rehau windows white & oak

Recent installations of Rehau windows: LEFT: King Edward Rd, Bushey. Compare to the next door neighbours’ windows – we think ours are nicer! RIGHT: South Oxhey light oak Rehau windows and porch. Both installations have dummy sashes in the windows for equal sightlines.


Who or what is Rehau?

Our standard window and door range is made from the renowned REHAU engineered uPVC system. REHAU was founded in Germany back in 1948 and first entered the UK market in 1962. One of the first companies to produce and sell uPVC window and door systems in the UK, today all Rehau systems are manufactured in their state of the art plant in North Wales – successfully bringing together the best in German design with UK manufacture.

Not all uPVC windows are the same – the quality of the materials, construction, overall design, locking and weather proofing systems can vary immensely from manufacturer to manufacturer. As the established market leader in the supply of uPVC window and door systems, we’re very proud of the fact that we install Rehau windows and doors as standard at Harp. Check out our Rehau windows album on our Gallery page and see what we could do for your home!

You can also find out more about all our products on our brochures and videos page.


Endorsements & Reviews

Watch Our Videos

Window unit replacement to a sash

10 Verified Review

Fantastic service from beginning to end. Local showroom in Watford with a super variety of windows and doors The fitment of the sash for my son's bedroom, best decision. Quality window and beautiful finish Paul and Miles are polite and friendly. Paul is a master at his job and Miles is super when finishing and completion. Thanks guys and thank you Harp Windows

Location: WD25September 2023

Replacement front door

10 Verified Review

All appointments on time. Advice useful when choosing design. Fitted in less time than expected.

Location: WD23August 2023

Bay Window Replacement

10 Verified Review

I have to say I have been impressed with HARP from start to finish. I was guaranteed the best price from John at the beginning, There was no hard sell or tricks, Just simple and honest. I ordered 1 window to replace my old bay which I was advised would take 6 weeks from ordering. My window arrived slightly earlier than anticipated and was fitted without delay. The fitting team worked in a clean and tidy manner, were punctual and had a great attention to detail.

Location: WD24July 2023

Supply rear door.

10 Verified Review

Excellent service, most helpful and friendly. Highly recommend.

Location: BH10May 2023

2 x casement windows

10 Verified Review

Very pleased with product and workmanship. All done with no fuss and no mess. Brilliant job. Billy even hoovered up afterwards !

Location: WD18May 2023

New windows and doors

10 Verified Review

Excellent service from both the showroom staff and the fitting team . Quality of the windows and doors is very good , and would highly recommend this company

Location: WD24April 2023

Read all 250 reviews

  • Harp Windows (Watford) Ltd
  • 91-93 St Albans Road
  • Watford
  • Hertfordshire
  • WD17 1UL



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