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Double Glazing Suppliers

At Dekko Window Systems, we've built a reputation for excellence in the double glazing industry. For over 15 years, we've been one of the leading double glazing suppliers for trade installers seeking high-performance windows and doors that enhance any property. We manufacture a comprehensive range of uPVC, aluminium, and timber-alternative products, ensuring you have the perfect solution for every project.

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uPVC Windows

At Dekko, our high-quality uPVC window frames are high performance in terms of security, energy efficiency, and aesthetic appeal. They are also available in a variety of styles, configurations, colours and woodgrain effects to meet the demands of diverse applications.

Infinity windows – Infinity uPVC windows are a premium product for high-end installation projects. Identifiable by their smooth corner weld design, Infinity windows create the traditional timber look with the modern performance of uPVC.

Infinity flush sash windows – At Dekko, our high-quality uPVC window frames are high performance in terms of security, energy efficiency, and aesthetic appeal. They are also available in a variety of styles, configurations, colours and woodgrain effects to meet the demands of diverse applications.

Infinity casement windows – Infinity uPVC casement windows can be specified with either a chamfered or sculptured frame. Sitting proud of the exterior of the property wall, Infinity casement windows are the perfect choice for both modern and more traditional properties.

Deceuninck windows – Deceuninck uPVC windows combine attractive aesthetics with a low maintenance finish and thermally efficient design. Using the latest technological advancements, they are easy to install with limited on-site disruption.

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uPVC Deceuninck windows with georgian bars
Windows showcase in Dekko's Showroom

Timber Effect Windows

With a wide range of colours to choose from, timber effect windows offer the elegance of real wood without the maintenance. These durable and long-lasting windows are also energy-efficient and offer high security, helping to reduce energy bills.

Residence 2 windows: Residence 2 windows have a flush exterior finish with a square interior detail. They are designed to create a perfectly symmetrical look with equal glass sightlines and an internal deep square edge.

Residence 7 windows: Residence 7 windows feature a seven-chamber design for superior thermal performance. Their sleek and smooth finish perfectly complements both traditional and contemporary properties.

Residence 9 windows: Residence 9 windows are designed to faithfully replicate 19th century traditional timber windows. Their superb replication is matched by their thermally efficient nine-chamber design and modern glazing.

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Aluminium Windows

At Dekko, we supply high-quality aluminium windows to UK trade customers. When you want to increase your sales by offering your customers the best premium quality products, Dekko can help. We manufacture all our aluminium products at our Lancashire factory to enable us to oversee quality at every stage. We provide a prompt nationwide delivery service and strive to meet all delivery targets on time every time.

Our high quality Räum range of aluminium windows provide exceptional levels of thermal performance, and are weather-resistant and super secure. Slimline high performance Räum windows are suitable for a wide range of applications, from high-end commercial installations to modern residential developments and are available in a range of colour options. From bespoke portholes and oversized windows to bay and bow windows and flush casement windows, Räum windows provide truly unrivalled levels of design opportunity.

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Large round aluminium window in antracite grey
Chartwell green upvc entrance door with gold furniture

uPVC Doors

We offer a comprehensive selection of uPVC doors. Our uPVC doors provide excellent weather resistance, thermal efficiency, and a wide range of customisation options to match your style and needs.

uPVC residential doors – Fabricated using high quality Deceuninck profiles for the best in product performance. Our PVCu doors provide excellent levels of weather protection and thermal efficiency. Our PVCu doors can be customised with a range of hardware, coloured finishes, and glazing options.

Deceuninck Slider 24 – The Slider 24 patio door provides superb levels of weather resistance, durability, and a low threshold for easy access. It is available with 2, 3, or 4 panels with a maximum frame width of 5932mm. Available in your choice of 26 colours including authentic woodgrain foils, it is the perfect sliding patio door for a range of applications.

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Composite Doors

We offer two exceptional composite door lines – Infinity and Solidor – to suit your project needs. Crafted for beauty and built to last, these doors provide the charm of timber aesthetics with the exceptional weather resistance, low maintenance, and thermal efficiency of modern composite materials.

Infinity composite doors – When you want to offer your customers the attractive aesthetic look of timber with the high performance and low maintenance of PVCu, Infinity doors are a great choice. Their timber effect laminated finish offers an authentic finish, perfect for traditional properties.

Solidor composite doors – Solidor composite doors stand out as the best for style and performance. Their solid timber core provides excellent thermal efficiency while their durable skin is weather resistant and low maintenance. Available with chamfered or sculptured frames, choose from a range of 20 stylish colours including dual colour options.

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Black solidor composite door
Aluminium sliding patio door

Aluminium Doors

Räum bi-fold doors – Räum bifolds are available in two aluminium systems. Räum Gleiten 68 is the more cost-effective option and is available with between 2 and 7 opening panels with a maximum opening width of 7m.

Räum patio doors – Räum aluminium patio doors are available as either a horizontal triple track sliding door or with a lift and slide opening system. The horizontal sliding systems activates when the lock is engaged and slides effortlessly open. The lift and slide variation is activated once the handle is turned 180 degrees, enabling the whole sliding sash to be raised and slide smoothly along the track.

Räum entrance doors – Räum entrance doors are fabricated using thermally broken aluminium profiles. They achieve an A+ rating for energy efficiency, provide excellent levels of acoustic insulation, and come with a choice of a low threshold for easy access.

Decalu 88 folding doors – Decalu 88 is a contemporary 88mm thermally efficient system featuring a pre-inserted gasket that avoids shrinkage and creates a flush frame, maximising clean sightlines. These doors are energy efficient, with u-values of as low as 1.4 when double glazed and 0.68 when triple glazed.

Decalu 88 entrance doors – Decalu88 is a contemporary 88mm thermally efficient system equipped with special ABS inserts which adapt to temperature change, allowing the internal and external faces to expand and contract independently of one another, limiting bowing to a maximum of 2.5mm, even in extreme heat.

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Why Work With Dekko?

At Dekko, we are dedicated to supporting all our customers. We offer a nationwide delivery service and competitive lead times, and strive to always deliver on schedule. We offer all our trade customers extensive after sales and marketing support to help them to showcase their product range.

Dekko have an in-depth knowledge of the glazing industry encompassing product knowledge, manufacturing techniques, and sector trends. When you choose Dekko as your window and door supplier, you access a wealth of valuable information to help you to grow your business.

For further information including delivery information, please contact our customer service team who will be happy to assist.

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Dekko windows trade counter in Swindon


Fast delivery and would highly recommend

"Ordered double glazed window for our shop. Dealt with Nathan on the Trade Counter, who was excellent and went above and beyond the usual customer service. Window was very well made and arrived with no problems. Fast delivery and would highly recommend."

Tony Spooner

The windows look fantastic

"Recently used Dekko Windows to supply the windows and aluminium bi-fold doors for our renovation project. We paid a short visit to their showroom where Rob and Neil were really helpful, showing us around and providing options for us. We were really happy with the whole process and the windows look fantastic. Would definitely recommend this company."

Richard Kennedy

Very happy with the level of service and products

"I've been using Dekko Windows for a number of years now and have been very happy with the level of service and products. Rob and Neil have never failed to get back to me promptly with quotes and lead times etc and Leon the delivery guy is always happy, friendly and helpful whenever unloading frames on site."

Peter Bain

Excellent service

"Excellent service. It's always a joy to deal with Rob, Neil and Leon. They always go out of their way to assist me with my projects and are very professional and friendly. Thanks again to the Swindon Dekko Team!"

Jordan King