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UPVC, aluminium and timber manufacturers

Operating since 1977

Full range of Deceuninck, Reynaers and Accoya systems

Manufactured in the UK

An introduction to Dempsey Dyer

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Sit back, relax, and learn more about Dempsey Dyer – the industry specialists.

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Orangeries, What are They?


Orangeries, what are they? In layman’s terms, orangeries are extensions for properties, much like how conservatories are. But what makes them different from conservatories, or any other extension for that matter? Conservatories are usually structures comprising of glazing and a uPVC frame, whereas orangeries (also known as a sunroom) often sports a solid roof and walls usually made from brickwork. Orangeries are considered not only sturdier than conservatories but tend to also be better at retaining heat too.

Our orangeries give you the best of both worlds. We offer large, glazed openings that are often associated with conservatories whilst still sporting the solid brick layers that you love and know. Our orangery extensions are highly versatile, meaning that they are extremely customisable, as we offer bespoke orangeries for our valued customers, who can choose from style, configuration and finishes to create an entirely bespoke orangery that is completely tailored to your personal interests and specifications.

Such customisable options include our four beading options to help make your uPVC windows inside your orangery feel that much more personal to the homeowner. Or our range of bespoke timber options for a rustic and traditional look and feel, which is also extremely suitable for conservation areas. We also offer a variety of colours available to our uPVC orangeries, from the Standard, Woodgrain, Decoroc and OmniRal collections. This includes traditional whites, authentic woodgrains, matt finishes and durable Deceuninck options.

We also offer orangery extensions that are incredibly thermally efficient. This means that our orangeries have been expertly designed to trap and retain the natural heat inside your home. This prevents needless heat loss from escaping through your windows, meaning that your interior will remain at a consistently comfortable temperature, which can be especially helpful during the colder seasons. Homeowners will also find such a feature as a worthwhile investment, as our orangeries not only insulate the natural heat but they also circumvent the need to switch on the central heating. Save money on the energy bill as you enjoy your new orangery extension.

Our orangeries also provide a security guarantee for homeowners and their loved ones who want to feel safe and secure inside their own homes. Secure by Design accredited, we here at Dempsey Dyer know what it takes to make sure your home security is elevated. Our orangery extensions are no different when it comes to providing a secure defence against any would-be home invaders. We utilise MACO locking hardware that will prove to be a difficult obstacle for anyone without the key to the property. On top of the already sturdy profile of our orangeries, we also offer uPVC profiles for our extensions, meaning they are both resistant to human invaders and the weather. Enjoy an orangery extension with a substantial lifespan as it resists heavy rain and strong winds as you rest inside comfortably and safely.

Orangeries, what are they? Orangeries are a home extension that comprises of brickwork foundation and a solid roof and are often compared to conservatories. Our orangery extensions stand out from the crowd with our incredible customisable options, thermal performance and immense security. To find out more about our orangeries, why not try our free quoting engine or gives us a call.

Can Conservatories be Warm?


Can conservatories be warm? An ever-present concern for homeowners is the heating performance of property extensions, particularly conservatories. Older profiles of conservatories are often plagued by inefficient thermal performance, meaning that during seasons such as Summer or Winter, conservatories can often be too hot or cold, making them inhospitable or unbearably uncomfortable during at least half of the year. Such a lack of comfortable availability is completely unacceptable, which is why we here at Dempsey Dyer offer uPVC conservatories.

uPVC Conservatories

What are uPVC conservatories? In order to make sure homeowners can enjoy a house extension such as a conservatory all year round. uPVC conservatories renovate a classic property extension with modern benefits. uPVC profiles offer better thermal performance than older designs, allowing for greater entrapment and retention of natural heat inside your property.

Thermal Efficiency

But what is so special about thermal efficiency? Thermal efficiency is what dictates how warm and comfortable your uPVC conservatory is. By preventing needless heat loss, your uPVC conservatory can remain at a comfortable temperature, be it Summer or Winter, making sure that you can enjoy your uPVC conservatory whenever you want, not when the seasons decide.

Modern Benefits & Features

On top of modern thermal performance, our uPVC conservatories are known for a myriad of other modern benefits that can not only keep your new extension warm but provide other sought out features that any homeowner would love to have for their property.

We offer five bead options that are available to not only our uPVC conservatories but our uPVC doors and windows too. Bedazzle your property pieces with our decorative and chamfered bead options that can suit both traditional and modern aesthetics. Our designs are specifically tailored to meet our valued customers’ needs. We offer bespoke beading to make sure that your warm uPVC conservatory is both comfortable and stylish.

We also offer a vast range of premium colours and finishes to make your uPVC conservatory truly bespoke to you. In addition to the many styles of uPVC conservatories that we offer, such as lean-to, Edwardian and Victorian, homeowners can take advantage of our versatile, customisable options to create a warm uPVC conservatory just for them. We offer many traditional finishes such as Rosewood, Golden Oak and Nut Tree for a more cosy, timber look that would befit the warm interior of your new conservatory. Or perhaps you would prefer a more modern finish such as Black Ash and Anthracite for a sleeker-looking extension.

But our offers of customisable options do not end there; we also offer a variety of hardware options that range from door handles to hinges. Enjoy our selection of both traditional and contemporary hardware options that can make any uPVC conservatory feel unique and personal to the homeowner. Not only do we provide functional warmth to our conservatories, but we offer superior customisation to our valued customers to create truly bespoke uPVC conservatories.

Can conservatories be warm? We here at Dempsey Dyer would not only argue that yes, they most certainly can, but that our uPVC conservatories can do that and more! Get a warm house extension that has all the extra modern benefits too. Enjoy the immense thermal performance and unmatched customisation with us today by either getting a free quote or contacting us.

Contemporary Aluminium Windows

Why pick contemporary aluminium windows? Here at Dempsey Dyer, we believe that modern aluminium windows are a perfect fit for more contemporary homes, buildings and extensions alike, both aesthetically and functionally. Sleek and thin, these contemporary aluminium windows can fit into any modern home, or even make more traditional homes feel just a little bit more new. They don’t just look modern, they perform modern. With a range of benefits that will improve your home life such as high thermal efficiency and acoustic insulation.

Style-wise, contemporary aluminium windows are unbeaten. With sleek frames such as our Slimline Aluminium Windows, sporting a slim and refined aesthetic. Minimalistic and thin, they take up less space and can fit into any home whilst making them look and feel modern. Choose from our many styles such as Bi-Fold, French and Sliding Patio to suit all tastes. They also come in a range of RAL colours, allowing you for the full reign to customise your modern aluminium windows however you like. Utilise our dual colour options that allow the functionality to select different internal and external shades. With Dempsey Dyer, the design possibilities are endless. Our contemporary aluminium windows are also powder-coated, providing a high-quality finish.

To further make your contemporary aluminium window feel bespoke to you, we also offer high-quality, premium hardware options to make your window truly yours. Our trade supply of Reynaers aluminium windows also come with their standard Elementary handles (F and FF). We also offer a range of Fab & Fix which have been tested for use thousands of times. Our handles come in a range of available colours, such as antique Black, Gold, Chrome, Satin and even Bronze. This range is high performing and offers high security as standard. Receive smooth performance across thousands of uses over many years.

Performance-wise, our contemporary aluminium windows are thermally efficient, allowing for a warmer home without the need to switch on the central heating. Incur less cost on the heating bill with our modern aluminium windows. No longer will you have to choose between style and function, as you can enjoy both with us. Our windows are capable of trapping and retaining heat inside, meaning your home stays warmer. This is further elevated with our range of double glazing options. Our double glazed profiles reach u-values as low as ÂĽ W/m2K and receive an energy rating of A. We also offer triple glazing options for our modern contemporary windows which reaches u-values as low as 1.0 W/m2K and receive an amazing energy rating of A++. Our energy efficient glazing options can also be decorative, available in a range of styles that can beautify your contemporary aluminium window whilst improving the privacy of your home.

Aluminium windows using the Raynaers CS 77 profile.

Such styles include Stippolyte, Canterbury, Satin, Cotswold and Contoura. Leaded glass and astragal bars can also be incorporated into our bespoke aluminium windows to add some character to a modern home or emphasise a period property’s charm. We can also simulate any glazing specification with our windows, making it easy for you to make sure you’re happy with your choice.

Our modern aluminium windows also offer market-leading noise elimination. The system is flexible enough to allow for the inclusion of a glazed unit of up to 43mm thick which makes it possible to incorporate sophisticated acoustic glazing. This is perfect for those that live near busy roads, railways or airports. Enjoy a quieter interior as your contemporary aluminium window suppresses unnecessary sound.

A modern window requires modern security. We pride ourselves on the security of our contemporary aluminium windows. Along with both the double and triple glazing options, you will find that our modern aluminium windows are incredibly durable despite their slim and sleek appearance. Designed and tested to the most stringent security standards. They feature the latest security hardware such as hinge-side security brackets, multi-point locking mechanisms and lockable handles. Our windows meet the BSI PAS 24 standard and police initiative Secured By Design accredited. We intend to make sure our customers have a window they can rely upon. Increase the security of your property. People deserve to feel safe and secure inside their own homes, which is why we wholly recommend our contemporary aluminium windows.

Choose a modern window with modern benefits. Our contemporary aluminium windows are slim with a wide number of benefits to drastically improve the value, performance and comfort of any property it is installed in. Enjoy a secure, thermally efficient and overall stylish window that will elevate the aesthetic and performance of the building it is in. Contact us today to find out more, or even use our free quoting engine to see if our modern aluminium windows are for you.

What are Wood Effect Windows?

What are wood effect windows? To put it simply, wood effect windows are uPVC framed windows with the appearance of a timber frame. This means that although they appear wooden, they are in actuality built with a uPVC profile, which is an Un-plasticised Poly Vinyl Chloride. This means that they are incredibly durable and sport significant life spans. They can weather the worst outdoor conditions and retain their gorgeous look without compromise.

White timber flush sash windowsYou can enjoy the traditional timber look without all the unnecessary upkeep or replacement cost. Wood effect windows allow you to enjoy the look of the old with the benefits of the new, such as thermal efficiency and property security.

Utilising the classic look and the durability of uPVC frames, wood effect doors can come in a variety of styles that are perfect for traditional or heritage homes, maintaining the aesthetic of the buildings. They are also a superb choice for those looking to add a traditional piece to their modern homes to emanate that classic feel. Such styles include:

  • Flush Sash: A minimalistic design outlined with beautiful timber frames that sport high-quality Deceuninck uPVC profiles. Available in a wide range of wood finishes such as Rosewood, Golden Oak, Nut Tree, Chartwell Green, Irish Oak and even Anthracite among many others. These options provide the appearance of natural wood, whilst maintaining the maintenance ease and lack of warping of uPVC. Our popular Heritage (H) shades are extremely durable and even allow a different colour on the interior frame. Our fast-track (F) colours are perfect if you need your flush sash timber look windows quicker.
  • Mock Sliding Sash: Enjoy this classical look marked by its cross-like framing that can add an authentic traditionalist aesthetic to any home. Using the Deceuninck 2800 decorative system we can offer attractive windows that replicate traditional timber with all the innovative advances of modern profiles. Also available in a wide range of wood finishes such as English Oak, Cream White, Heritage White and Black Ash, among many others. Achieve a customised, classic look of the mock sliding sash whilst enjoying the modern benefits.
  • Stormproof: Enhance your property with the panelled look of our Stormproof windows. Enjoy the ability to open multiple panels of the window to allow for maximal airflow without completely exposing your home, allowing for privacy also. Just like the aforementioned styles of wood effect windows, stormproof windows offer a wide range of customisable options to allow you to decide the look of your wood effect window. Utilise a combination of wood finishes to achieve a more unique, wooden look and feel such as Anthracite/Heritage White, Agate Grey/Heritage White and English Oak/Heritage White, among many others.

Our wood effect windows aren’t just available in a wide selection of wood finishes and styles, but they perform brilliantly also. Being thermally efficient, you can be sure our wood effect windows would be a worthwhile investment. Being registered with the BFRC under their window energy rating scheme and boasting an efficient energy rating of A through our Deceuninck profile, our wood effect windows intend to keep you warm. They achieve this through trapping and retaining the heat inside your property, keeping the interior toasty and cosy. This means you can save on the heating bill, as you won’t have to turn on the central heating, saving you money. This is also amplified through our glazing options, allowing ample sunlight to shine through, whilst keeping the heat in.

Timber Stormproof windows

Another key aspect of our wood effect windows’ performance is the invaluable security they provide to any property they are installed in. With patent-pending internally developed robust jointing mechanism – each corner and locking point meets 7KN in tests. We also utilise stainless steel corner bracket for extra integrity and shootbolt multipoint locking mechanisms. We do our utmost best and beyond to ensure that our wood effect windows not only look authentically classic but perform authentically modern. Feel safe and secure with our wood effect windows, as any would-be intruder is effortlessly foiled by the intimidating security of these windows.

Wood effect windows, to put it simply are uPVC windows with the appearance of timber-framed windows. In actuality, they are much more than that. Donning the timeless aesthetic of wooden windows, you get a window that is thermally efficient and improves your home security, being a worthwhile investment for any property looking to enhance its performance. On top of this, you can wholly customise your wood effect window without fear of having to maintain upkeep or worry about replacements, as the durability and lifespan allows you to enjoy a window that will not only look good but perform well. To find out more contact us today or use our free quoting engine!


Conservation Area Window Replacement

If you live in a conservation area, what are the best windows for you? Homes in these areas often have strict rules for new installations. Because the property is usually a classic home or is surrounded by them, you will want to retain the area’s distinctive and authentic style. As a result, options such as uPVC and aluminium windows would go against this.

One option that suits conservation area homes is timber windows. Wooden windows are a timeless design, offering authentic quality that is perfectly in tune with traditional homes. You may have heard that some outdated timber profiles have a reputation for struggling over time and requiring regular upkeep and expenses.  This is not the case with Dempsey Dyer timber windows.

We believe every home in a conservation area should benefit from high-quality windows. As a result, we supply market-leading timber windows that will enhance any home. Our designs are more resilient, long-lasting, and can even save energy inside your space. Because of this, you can preserve a property’s highly sought after conservation style while transforming its performance.

Rules for Conservation Area Windows

Firstly, you’ll need to know the rules for conservation area windows to figure out what you can install. If you live in one of these areas, it can be tricky to find windows that meet the standards of conservation areas. Often, they’ll stick out against your home or others, detracting from the area’s overall cohesive style.

Under legislation introduced in 1995, local authorities can make further restrictions as well. Known as Article 4 Directions, these rules make finding replacement windows for a conservation area even tougher. Your local authority may judge the glazing bars, rails, sashes, and so much more. Even the smallest detail in your window can make the biggest difference.

We work with timber windows that uphold conservation area rules. Because of this, you’re far more likely to get the approval of authorities for your installation. Not only that, you won’t have to compromise on the design of your window. You’ll still get high-quality timber and double glazing, all with authentic style.

conservation area window replacements

Timber Conservation Area Windows

Because of the rules, timber conservation area windows are usually the best option. But that isn’t the only thing that makes modern timber windows attractive. Wooden windows are still the most attractive product on the market today, as they have a look that other windows can’t match. While uPVC and aluminium windows can all come with woodgrain finishes, but for many homeowners, nothing beats the real thing.

Modern timber windows have more resilient softwood, which is sourced sustainably. Because of this, these designs shatter the myth that timber windows don’t last long. According to the BRE, many timber conservation area windows can last for 60 years, and we’ve seen examples of these windows making it past 100.

Also, timber conservation area windows give you more options. Because they have a timeless look, you can style the windows more creatively without worrying about them looking out of place. Not only that, you won’t have to pay higher prices for many of those options! As a result, you can get windows that pull on your heartstrings without pulling on your purse strings.

Conservation Area Windows from Dempsey Dyer

If you live in a conservation area, finding the right windows is crucial. However, the people who provide them are just as vital to enhancing your home in the right way. At Dempsey Dyer, we supply timber windows that are ideal for homes in conservation areas. Our range of options combines classic quality with modern materials to give you the best of both worlds.

We design and manufacture all of our windows in-house, giving you more options in how you style them. Our designs can come with traditional butt hinges, casement stays and astragal bars to add to the classic look. Our windows are perfect for the needs of today. You can benefit from advanced double glazing, MACO locks, and Espagnolette locking systems tested 40,000 times over.

Dempsey Dyer makes sure every one of the timber windows we offer are brilliant for listed buildings, too. If you live in a Grade II building, then our designs are still likely to get approval. Getting conservation area windows and enjoying all the benefits they provide has never been more straightforward.

Conservation Area Replacement Windows Prices

Get in touch with Dempsey Dyer today to find out how our conservation area windows can help you. We offer our leading designs at low prices, helping you make a better investment in your home.

If you’d like to find out more, give our friendly team a call today on 01977 649 641. We’ll be more than happy to offer any advice and information we can. You can start your trade quote online today.

We look forward to hearing from you soon!


Installers and other businesses can only work effectively if they have a reliable trade supply service – offering the highest performing products. Luckily, here at Dempsey Dyer we only supply the latest options from market leaders. This guarantees quality, performance and durability – regardless of the product choice.

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