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Leading UPVC and timber manufacturers

Operating since 1977

Range of Deceuninck, Alunet and Accoya systems

Manufactured in the UK

An introduction to Dempsey Dyer

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Why Are Sliding Patio Doors a Thermally Efficient Option?


Sliding patio doors are a popular installation among homeowners because they blend in indoor and outdoor spaces. Apart from this, they offer numerous energy-efficient benefits. At Dempsey Dyer, we are proud to offer a trade supply for sliding doors,  so in this article, we will explore why these doors are a thermally efficient option for end users. To learn more, read on.

Thermal Design

One of the primary reasons for the thermal efficiency of sliding patio doors lies in their design. These doors typically consist of multiple glass panes, creating an insulating barrier between the interior and exterior of your home. The space between the glass panes is often filled with argon gas, further enhancing the doors’ insulation properties. This design effectively prevents heat transfer, ensuring warmth in winter and coolness in summer.

Weatherstripping and Seals

In addition to their design, sliding patio doors feature weatherstripping and seals that could help reduce air leakage. This is crucial for maintaining a comfortable indoor temperature and reducing energy waste. By preventing drafts and air infiltration, sliding patio doors significantly improve the overall energy efficiency for end users.

Natural Light

Inform your customers that sliding doors provide plenty of natural light in their homes. Not only will this create a brighter space, but it will create a seamless blend between their home and garden. As a result, the sliding doors that you offer will deliver exceptional year-round performance.

High-Performance Glass

When selecting sliding patio doors, it is essential to consider the quality of the materials used. Inform your customers that sliding patio doors offer low e glass, which boosts their thermal efficiency. Low-E glass has a special coating that keeps heat inside during winter and blocks heat from entering during summer. This helps maintain a comfortable indoor temperature year-round and reduces the strain on your heating and cooling systems.

Energy Savings and Sustainability

Investing in thermally efficient sliding patio doors can lead to long-term energy savings for homeowners. By reducing heat loss and gain, these doors help lower heating and cooling costs. Additionally, they contribute to a more sustainable and environmentally friendly home by reducing your carbon footprint.

At Dempsey Dyer, we offer a wide range of high-quality sliding patio doors designed with energy efficiency in mind. Our doors are crafted using premium materials and advanced insulation technologies to ensure optimal thermal performance. Whether you’re looking for traditional or contemporary styles, we have options to suit every homeowner’s taste and budget.

Get a Sliding Patio Door With Dempsey Dyer Today

We hope that this article has helped you understand what makes our sliding patio doors thermally efficient. It can help you offer customers a strong selection of benefits for your home.

Sliding patio doors are a thermally efficient option for homeowners due to their design, weatherstripping, and use of high-performance glass. These doors provide excellent insulation, minimise air leakage, and let in plenty of natural light. By choosing thermally efficient sliding patio doors from Dempsey Dyer, you can enjoy a comfortable home for years to come.

To learn more, fill our online contact form out and our friendly team will be on hand to help you.

Timber Windows & Doors – Engineered for Energy Efficiency

At Dempsey Dyer, we supply wooden windows and doors for the trade. With winter coming up, it is essential that the windows give you outstanding energy efficiency for your home as it will be warmer in the winter. A unique selling point, this will save money on energy bills, which is imperative in a cost of living crisis.

We know how important it is to improve thermal efficiency, so in this article we will explain how thermally efficient wooden windows and doors will make homes warmer. Furthermore, the article will compare the thermal efficiency of wooden windows to aluminium and uPVC windows. To learn more, read on.

Timber Windows Offer More Energy Efficiency Than uPVC Windows

In comparison to uPVC windows, modern treated timber lasts longer because it keeps your home at a warm temperature. Combined with advanced double glazing, it offers a robust thermal barrier that boosts your natural heat intake. The base substrate of the window is naturally warm to the touch, preventing condensation build up. For homeowners who are concerned about their heating and cooling bills, this is an ideal design to suit their needs.

When choosing wood as a natural insulator, this minimises the effect on energy bills. Around 80% of energy you use on your home goes towards heating. By choosing a wooden window or door, this saves costs significantly.

Accoya Wood Offers a Stronger and Long Lasting Look

At Dempsey Dyer, we use Accoya wood to manufacturer timber doors. This is an eco friendly choice that uses a patented technology that stands firm against tough conditions. This process also removes water from the existing wood, allowing it to stay strong for many years to come. The design is Class 1, offering the highest level of durability and sustainability.

Accoya wood is available for a variety of styles such as Casement and Flush Sash Windows. Obtained from naturally renewable sources, the design is suitable for traditional properties. Accoya is a natural wood that ensures it weathers naturally. It is more stable in comparison to uPVC, which degrades over time. Accoya only uses timber from sustainable forests, which offer many benefits to the environment. In comparison to other materials, timber is a renewable source. This means it can always be replenished.

Timber Windows Contain Polymer Weather Seals

Timber windows offer  better heat retention. polymer seals, vinyl perimeter seals, and rubber capillary seals protect against draughts and cold spots. This is ideal if you are choosing a tilt and turn window, as it is connected to the grooves so cold air won’t be able to enter.

Save Money on the Long Run by Upgrading from Double Glazing to Triple Glazing

One option to improve your wooden windows energy efficiency is to upgrade from double glazing to triple glazing. This will add an extra layer of protection and warmth. Triple glazing ensures your home is up to 40% more energy efficient. With exceptionally low U values, homeowners can expect to save over ÂŁ160 on their bills, making it easy for them to spend on the things that matter.

Check the Locks to Ensure the Windows Are Sealed

It is important to check that the windows are sealed, as they will keep warm air in your home. If gaps are left in the windows, cold air will enter easily. Furthermore, timber windows can also be made warmer by repairing the frames individually. As a result, save plenty f money on costly repairs!

Prevent Warping on Your Timber Door

Timber doors are prone to warping easily. Warping is when a door twists and contorts in toughened conditions, and is caused by the door twisting in toughened conditions.

It is essential to take care of the door properly by preventing it from warping and regularly checking it so it doesn’t absorb water. Choosing a strong finish is ideal because it prevents moisture from entering the door. As a result, homeowners won’t need to worry about mould and draught spots.

Secure the Glazing Properly

Double glazing is a great way of increasing your thermal efficiency. However, having the glazing properly secured and in good condition. This way, natural heat will be retained indoors, lasting for a long time.

For extremely cold conditions, adding wood framed glass to the door will help buffer the weather and prevent any further damage.

Timber Windows & Doors from Dempsey Dyer

We hope that this article has helped you understand how timber windows will keep your home energy efficient. Timber windows offer plenty of protection against tough conditions, alongside draught seals which stop water ingress from entering your home.

If you have any questions about our timber windows, our team will be on hand to help you. Contact us on 01977 653002 and we will answer any questions you may have.

uPVC Doors vs Timber Doors: Which One Is Right For You?


At Dempsey Dyer, we supply a wide range of timber and uPVC doors for the trade. With decades of experience, we guarantee a high level of quality, ensuring both these doors last for many years. These doors will give your customers many benefits for many years to come. This ensures you will meet the demands of your customers and supply the highest quality uPVC and timber windows.

We are committed to ensuring that our customers get the best possible experience. Benefit from unbeatable lead times and fast turnarounds, resulting in a seamless end journey for your customers.

We offer uPVC doors and timber doors which come with unique benefits that will enhance your customers’ property. In this article, we will compare and contrast the advantages which you can offer to your customers. This helps them make an informed decisions and consider their options. Read on to find out more.

Timber Doors Offer Unbeatable Aesthetics

When your customer considers a timber door, let them know that it offers unbeatable aesthetics. We only offer the most innovative materials that will enhance the look of your customers’ home.   Our timber is crafted form Accoya Wood, which is designed to last a lifetime. What makes Accoya wood stand out is its unrivalled performance as it doesn’t rust, twist, and shrink in toughened conditions. Made from a number of coatings, colours, and textures, it creates a defining factor in your customers’ home.

In addition, we offer the Sapele wood which is designed for hard weathered conditions and extra durability. What’s more, it is low maintenance, ensuring it is easy to be wiped with a damp cloth. the European Oak is a lighter range, suitable for customers who are looking for natural light.

Timber Doors Are Sustainable Against the Environment

When your customer chooses our timber doors, feel confident that they offer outstanding sustainability levels. Let them know that their property will be protected against strenuous conditions, bolstered alongside the windows’ advanced double glazing. Our Accoya range comes from sustainable forests, so they won’t suffer from environmental damage.

A unique selling point of timber windows is that they are equipped with a low carbon footprint, which protects you and the environment. It is non toxic, so it will be safe for pets too.

Timber Is Preserved In A Range of Styles and Colours

Inform your customer that our windows are available in a wide selection of styles and colours to consider. Give them an unlimited selection of colour choices, and let them know that they are all powder coated to last against the worst conditions. This will help your customers create the aesthetics to their home.

But that’s not all, because our timber doors are equipped with lion head door knockers and a selection of handles. These are stylish and functional, so inform your customers that they are easy to use. These designs are ideal if you are working on a traditional or modern property, resulting in plenty of variation and styles. Select Dempsey Dyer for precision engineered timber.

uPVC Doors Give Your Customer Plenty of Natural Light

If your customer chooses a uPVC door, it will give your customer plenty of natural light. This will save on energy bills while making their property brighter and more inviting. The uPVC doors offer a selection of patterns that ensure your customer gets a variety of choices. There are a range of options such as traditional and chamfered, letting you provide a product that suits both traditional and contemporary builds.

uPVC Doors Offer Strength and Security

Inform your customers that your uPVC door will give them plenty of strength and security in their home. The doors are accredited by Secured by Design, which is an initiative supported by the police that makes sure their home is safeguarded against intruders. uPVC is a robust plastic and comes with advanced double glazing, meaning intruders won’t stand a chance.

Let your customers know that the doors are durable against tough weather conditions.  The airtight and watertight seals mean that water won’t seep into your customers’ homes, saving them money on repairs.


uPVC Doors are strong insulators of heat and sound

Inform your customer that uPVC doors are strong insulators of heat, which saves them money on extortionate energy bills. This is a unique selling point because the double glazing that is equipped as standard comes with a polyamide thermal barrier. By insulating heat, it keeps the doors warmer in winter and cooler in summer.  Let them know that this will help regulate the temperature as it results in less use of central heating.

In addition, the doors are strong insulation of sound. The double glazing blocks out conversations outside, which is vital if your customers live in a busy area or roadside. This will reduce loud noises to a whisper.


Inform your customer that the choice of timber or uPVC doors is down to them. At Dempsey Dyer, we supply plenty of doors that will suit their needs. With the highest quality options available, they will stay durable for years to come.

To learn more about our doors, get in touch with our friendly team on 01977 649641. Or,  inform your customer of our online quoting engine,  where they can design a bespoke door. We will return with a price that suits them.




Contemporary Composite Doors – Style & Performance

When working on home improvement projects, we know you and your customers want a design that looks as good as it performs. Our composite doors are crafted using premium quality materials and modern manufacturing techniques which will help enhance the weatherproofing, thermal efficiency and security of a home.

We offer two different styles of composite doors, both of which come with aesthetic and performance benefits.


Solidor Composite Door

We supply Solidor composite doors which stand out for having a laminated timber core that forms the base of the door slab. A uPVC band is added to the edge of the door before an ABS plastic skin is bonded to the profile.

Solidor composite doors supplied by Dempsey Dyer feature steel reinforced frames, five point multi-point locks, Ultion cylinders and stainless steel handles and letter plates as standard. This will help the new door installation protect a space all year round.

Solidor composite doors come with a range of benefits, making them a fantastic investment for a customer’s home. One of their key benefits is how energy efficient they are. They have a U Value of 1.4 W/m2k, which can help improve the insulation of a building. A well-insulated home stays consistently comfortable without you needing to rely on your central heating.

Because composite doors offer industry leading levels of insulation, they can help homeowners enjoy a peaceful building. If your customers live in a busy area, by a noisy road or are disturbed by their neighbours, these doors can help protect the peace.

The natural timber core helps to boost the strength of the door, increasing the security of a building. Composite doors are often installed as front doors as they can resist impacts and handle adverse weather conditions.

These long lasting doors are available in a range of colours and woodgrain finishes. Whether you are working on a modern or traditional home, we can adapt our composite doors to your project. We also offer a range of hardware, finishes and accessories because we pay attention to the details.


Foam Core Composite Doors

We offer timber core and foam core doors, both of which can enhance the looks and performance of a home. Both of these doors are crafted using a blend of uPVC and laminated materials around the core. This ensures your new door is strong, secure and energy efficient.

Timber core composite doors have a more authentic design, market leading levels of insulation and can handle whatever life wants to throw at them. Foam core composite doors offer enhanced levels of weatherproofing, a more efficient and are hassle free to install.

Our trade supply composite doors are available in a range of colours, meaning you can meet customer requirements with ease. Although white is offered as standard internally, we offer 7 additional colour variations for the exterior. You can let your customer have full control over their new installation, with our timber spray department which will happily match any RAL colour.


Timber Or Foam Core Composite Doors?

Both designs offer market leading levels of form and function but there are some differences between these two designs.

We know your customers are always looking for ways to improve the thermal efficiency of their space. Foam and timber core doors are both highly efficient. Wood is a natural insulator so a timber core will help retain natural heat. Surprisingly, foam core doors are 19% more thermally efficient than timber core designs.

Foam core doors benefit from state-of-the-art hardware and the core is surrounded by robust materials. However, timber core composite doors are inherently stronger. You can offer your customers two secure doors that are durable and resilient.

If your customers like the look of wooden doors but are concerned with the long lasting weatherproofing properties, contemporary composite doors are ideal. They mimic many of the authentic features but can handle prolonged exposure to the harsh British weather conditions.

Whilst timber is more susceptible to wind and rain, the outer layer will protect the core from adverse weather conditions. Foam core composite doors, on the other hand, are weatherproof inside and out.



For over 40 years we’ve specialised in supplying the trade and commercial sector with premium quality products including composite doors. Our high grade installations are paired with a friendly, expert customer service and sales team who will be on hand to support you throughout.

If you are interested in offering your customers our contemporary composite doors, get in touch with us today. Fill out our online contact form or call us on 01977649641 and we will give you advice bespoke to your home improvement project.

Window & Door Colour Trends

Create a stunning first impression for any customer’s home with a new window and door installation. Simply changing a window and door profile changes the way a home looks and performs.

Although brightly coloured front doors or bold window frames are not new, colour technology has come a long way since the limited range of shades previously offered to homeowners. Because we manufacture many of our products and work with leaders in the industry, we offer bespoke colours and styles to our customers. This helps reflect your unique style.

We’re proud to offer a wide range of windows, doors and conservatories created bespoke for your specifications. Whether you’re looking for timber, uPVC or composite, our products lead the way in aesthetics and performance.


White windows and doors

White windows and doors are timeless and will never go out of style. They are one of the most popular choices in your local area because they are cost-effective and won’t become dated.

White is versatile and can suit almost every style of home. They can match any colour interior design and curtains, delivering a clean look every time. Avoid combining white windows with white render because they will likely weather at different rates. We recommend pairing white windows with cream and off-greys.


Cream windows and doors

Although white windows and doors are popular, the cream is a softer version that feels less clinical. Some people feel like white lacks personality, whereas ivory or cream maintains that clean aesthetic with a more heritage finish.

Cream uPVC windows and doors are a fantastic option for most UK homeowners, as they can fit well into most house styles and even add to the kerb appeal of a property.


Grey for windows and doors

For many modern interior designers grey is the new black when it comes to windows and doors. Grey windows and doors break away from traditional white, black or brown to set a property apart. Grey will allow customers to enjoy a modern twist on a traditional profile.

Grey is a complementary colour to raw stone or reclaimed building materials. Grey profiles will also seamlessly blend into more subtle and bolder colour-coordinated designs. We offer Anthracite Grey, which is a dark grey hue named after the coal it resembles.


Black windows and doors

If your customers enjoy a more contemporary and minimalistic style, black doors and windows can elevate the look of a building. Black profiles will create a dramatic statement that suits all home styles in your area.

Black windows can accentuate the external views, as the light that floods into them wash out the darker profile. They don’t need curtains to look good, perfect if your customer has a minimalist interior design.

If your customers are interested in a darker profile but are concerned about having pitch-black profiles,  choose darker shades like grey, plum and navy blue.


Natural wood effect windows and doors

Our windows and doors are available in stunning woodgrain finishes. These finishes mimic the look of traditional timber only have none of the durability issues. If you are looking for a low maintenance replacement for a wooden door, our woodgrain foil uPVC profiles won’t rot, warp or split over time and with wear.

Your customers will enjoy a window or door which mimics the look and texture of timber, with all the performance benefits of modern uPVC. Black and grey windows and doors are low maintenance because their darker shade will hide grime and dirt, making them look cleaner for longer.

If you are looking for a deep and rich tone, Rosewood is an extremely popular shade and looks good when paired with classic red brick architecture. Light oak is a more neutral wood tone that is more versatile.


Green windows and doors

Green hues like Sage Green and Chartwell Green are elegant choices when installing windows and doors. This traditional tone has been popular for styles and is often found in country homes.

Chartwell green is a more pastel tone that particularly works well as a front door colour. It is often paired with sophisticated silver or gold door handles and hardware to create a stunning first impression.



We hope that this article has helped you choose which colour is the best for your window and door installation project. Whether you are working on a modern apartment, a traditional cottage or a heritage home we will have the right tone for you.

If you want to find out more about our windows and doors, please get in touch with our friendly team and we will be on hand to help you. Fill out our online contact form or call us on 01977649641 and we will give you advice bespoke to your home improvement project.



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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