WINDOWS BY HARP

Quality and security as standard, plus energy efficient

Our Rehau and Kömmerling uPVC casement window range offers better security features, more style choices and exceptional energy efficiency. Every product is tested, certified and manufactured to the very highest standards for proven quality and peace of mind. With a BSI-certified quality manufacturing system and approved security features as standard, we take quality further. With exclusive designs, a wider style range and more additional options, we take choice even further too.

Rehau Rio Flush casements in Pearl Grey installed by Harp.

The outward appearance of most replacement windows and doors can be almost identical, but don’t be fooled into thinking that all uPVC products are more or less the same! The quality of the materials, construction, overall design, locking and weather proofing systems can vary immensely from manufacturer to manufacturer. To help make you aware of the features you should consider when buying replacement uPVC windows, we’ve listed the main points to consider:

All these benefits are standard on our uPVC casement windows.

Colours and finishes that stand the test of time

Fancy a change from white windows? Irish oak perhaps? A sleek and contemporary anthracite grey? Or something a little softer, like agate or pearl grey perhaps? Our standard uPVC casement windows are available in a combination of smooth colours and woodgrain effect foils, all of which are durable, scratch resistant, can be easily cleaned and offer high performance and longevity in all types of weather conditions. We have profile examples of different standard colours available in our Watford showroom. Other non-standard colours are also available on request but would require a longer lead time. Download our colour brochure here >>

Rehau uPVC windows and doors in light oak and anthracite finish installed by Harp.

The Rehau Rio flush uPVC casement window

The Rehau Rio flush offers all the benefits of modern performance with the classic, authentic look and feel of a traditional timber window. The casements fit flush within the frame and the clean lines capture the finish of real wood. Rio windows add character to both contemporary and traditional style properties.

Available in both chamfered and sculptured frame options with a wide range of trending and traditional colour finishes, optional astragal bars plus a choice of heritage, classic or modern handle designs, the Rehau Rio flush casement can be fully personalised to suit your home and style.

Rehau Rio flush fit casements in oak effect with rectangle leads and feature monkeytail handles.

Rehau Rio flush bay window in Pearl Grey installed by Harp.

Full house of Rehau Rio Flush casements in white with feature rectangle leads and Ballingdon front door in oak.

For more information on our Rehau Rio Flush uPVC windows, download your Rehau Rio brochure here.

The Ultimate and Heritage Rose sash window

Our Ultimate Rose and Heritage Rose sash windows have been carefully designed with authentic sash details and the result is a class-leading window with woodgrain finishes, industry-leading slim sightlines, putty-effect glass lines, timber style mechanical joints and fully run-through sash horns. Features like these make all the difference, and many find it hard to spot the difference between the Ultimate Rose sash window and a traditional timber sash. As well as being virtually indistinguishable from real timber, the Rose Collection offers many advantages over timber, including increased thermal and acoustic performance, ease of operation, and low maintenance.

Ultimate Rose box sash windows installed by Harp.

Ultimate Rose box sash windows installed by Harp.

The Quickslide Legacy uPVC sash window

The Legacy uPVC sliding sash windows carry all the beauty of a traditional design, coupled with all the benefits of modern materials that enable us to offer a cost effective, low maintenance window that doesn’t compromise on aesthetics. From near-invisible joints, the elegance of the run-through sash horn to the curvy ovolo frame shape and an authentic deep bottom rail, these are just a handful of the many clever details that work together to create a most graceful and advanced sash window.

Quickslide Legacy sash windows in Chartwell green.

With our Legacy sash windows, you can respect the traditions, admire the woodworker’s art, and enjoy modern advances that can make your home warm and secure. You can choose from a wide range of colours and authentic looking woodgrains (we even offer a bespoke colour bonding service, whereby we can produce windows in almost any conceivable hue), styles, features, and hardware options to complement your home.

Quickslide sash windows in black with black astragal bars installed by Harp Windows.

Find out more about both our Ultimate Rose and Quickslide Legacy sash windows on our Brochures and Videos page.

Two top of the range profiles to choose from – Storm or Flush fitting

Our top of the range windows, these are truly innovative, maintaining the look and feel of traditional wood but with all the advantages of state-of-the-art modern window technology. Handcrafted and tailor-made from only the finest materials, they offer outstanding energy saving, exceptional weather proofing and unequalled low maintenance. Two specifications of Evolution window are available – STORM 2 and the FLUSH system, designed to look just like a flush fitting timber window.

Evolution Storm windows and Evolution Ballingdon front door in Agate Grey wood effect.

Evolution Flush casement windows with feature leaded fanlights in white wood effect.

The Evolution Storm range successfully merges high-tech production values with hand-finished craftsmanship producing beautiful windows every time. A+ rated for energy efficiency, it’s this attention to detail that is applied to every single aspect of your Evolution window that makes it different from the rest:

Interior view of an Evolution window profile. Mechanical joints create a much more realistic timber-like look than a standard uPVC window.

Evolution colours and finishes

If you are feeling creative, the Storm 2 and FLUSH windows are available in a vast array of colours and with the exclusive ‘Kolorbond’ system we can create or match any colour you have in mind, the only restriction is your imagination!

If your tastes are more traditional, you can choose one of our popular wood-effect finishes in black wood, white wood, Tudor (black and white wood) natural wood, oak and cream. For more information why not download our range of Evolution brochures available on the brochures and videos page .

Evolution FLUSH profile in a light oak finish with single horizontal ovolo-putty external Georgian bar.

Enjoying a recent revival in popularity, aluminium windows have continued to be an attractive choice for replacement windows and doors. Harp Windows manufacture and install direct fix aluminium windows and doors, available in a choice of three main standard colours; white, black and brown, and up to 500 RAL colours available to order.

Harp Windows is proud to be an Aluk Approved Quality Fabricator of aluminium windows and doors, and our comprehensive and versatile Aluk product range is designed to provide solutions for all market sectors. You can download our latest Aluk brochure here >>

Aluk Crittal replacement aluminium windows and Origin bifold doors in anthracite grey, installed by Harp.

Aluk slimline aluminium windows and two panel sliding doors installed by Harp.

Aluk white aluminium windows and Origin bifold aluminium doors installed by Harp.

Origin Aluminium Windows

See also: our main Origin window page. For the ultimate aluminium windows, choose from our premium range by market leaders Origin Global. This is an industry-unique internal and external flush casement. Achieved through combining traditional design, advanced manufacturing and versatile premium grade aluminium, the Origin Casement Window offers high levels of security and thermal efficiency while complementing any type of build. With unrivalled good looks, security and thermal performance, the Origin Window also offers the added benefits of being maintenance free and manufactured from a premium grade aluminium for long-term reliability. The Origin Window can be manufactured in over 150 different RAL shades. From the subtle to the slightly outrageous, you can guarantee there will be a colour to suit every Origin Home, including a dual colour option.

Three styles of window to choose from:

The OW-70 SOHO window is the perfect match for the steel-style aesthetic bifold and internal doors you already love. Inspired by the world’s most iconic and architecturally stunning neighbourhood, The SOHO Collection from Origin brings artistic flair and diversity straight to your home. Combine the new SOHO windows with the SOHO OB-36 bifold and French doors and the OB-30 stunning internal doors, to create a whole-house SOHO aesthetic for a seamless and integrated industrial-style finish.

OW-70 SOHO Slimline aluminium window in pebble grey.

The OW-70 Slimline casement window offers ultra-slim sightlines of just 65mm from sash to frame with an external flush fitting. High security Nemesis locking system which is PAS 24:2016 certified.

OW-70 Slimline window

The OW-80 Premium casement window offers slim sightlines of 91mm from sash to frame with both internal and external flush fitting. High security Yale Encloser Locking system which is PAS 24:2016 certified.

OW-80 Premium window

Thermal efficiency: Able to accommodate both double and triple glazing, Origin windows include a sophisticated polyamide thermal break that’s built into the frame and prevents heat transfer from the inside to outside and vice versa. OW-80 windows can even go the extra mile to achieve a U-Value as low as 0.9 when using Aerogel technology – the same material that’s used in space suits and space shuttles. You can view our Aluminium Installations gallery to see examples of our Origin installations.

Download the latest Origin Windows brochure on our Brochures and Videos page.

Bereco Timber Windows

Quality and service are the heart of Bereco; only the finest quality sustainably sourced engineered softwood and hardwood goes into the manufacture of Bereco wooden windows, using the most advanced coating systems and the finest architectural ironmongery with extensive warranties. Wood not only has a natural beauty but is a natural insulator ensuring that your home is kept snug and warm. Bereco engineered timber is known to be 60% stronger than its solid timber counterparts, resulting in a low maintenance window with an impressive 60 year lifespan.

Our beautifully crafted timber casement windows are available in both flush and lipped (stormproof) designs. They are internally glazed with easy-clean friction hinges and home insurance approved multi-point locking mechanisms, making them the pinnacle of home security.

Bereco casement windows.

Bespoke timber windows from Bereco can be tailored to suit the style and design of your home. Choose from a wide range of mouldings and bar designs, and stylish monkeytail or bulb-end handles and stays available in a range of 10 colours. With factory applied paint or stain finishes including dual colour options, we guarantee that your new Bereco windows will totally transform your home. Download the Bereco brochure from our brochures and videos page.

Energy saving glass

Energy efficient glass products use a special coating to reflect heat from domestic heat sources back into the room, rather than allowing it to escape through the windows. At the same time, this coating allows free heat and light from the sun to pass through the glass, warming the room and further contributing to the energy efficiency of the windows and helping to reduce your energy bills.

For over two decades Pilkington K Glass™ has been the UK’s best known energy efficient glass, in both trade and consumer markets. Now with Pilkington K Glass™ S, the latest soft coat option, the range offers more choice than ever. Pilkington K Glass™ S is a high performance, low-emissivity soft coated product which offers excellent thermal insulation when incorporated within an Insulating Glass Unit (IGU). Pilkington K Glass™ S has a highly neutral appearance with optimal solar heat gain, thermal insulation and light transmission to provide the highest Window Energy Rating (WER) performance.

• Helps save money on heating bills through energy saving.
• Suitable for use in uPVC, timber and aluminium profiles – both in new and replacement glass windows.
• This energy-efficient glass can be toughened, laminated and glazed in the same way as float glass.

You can find out more about Pilkington K S in our PDF brochure.

NOTE: Pilkington K sealed units are now installed in our products as standard. However if you would prefer Planitherm glass this is still available but should be specifically requested.