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

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Dempsey Dyer

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Window, Door & Conservatory Manufacturers.

Since 1977, Dempsey Dyer have been manufacturers of high quality windows and doors. Over our many years of trading, we have sought to offer the most comprehensive product range available under one roof in the fenestration industry. We serve the trade and commercial sectors with our supply of timber, uPVC, aluminium and composite products. This product line includes a range of timber profiles manufactured at our own UK headquarters in West Yorkshire, Deceuninck uPVC profile systems, Reynaers aluminium profile systems and composite panels from the likes of Solidor.

Quality Guaranteed

Whether you are based in the trade or commercial sectors of the fenestration industry, Dempsey Dyer’s constantly-updated research and design programme ensures that we can always offer the latest additions to your product lines. In turn, this ensures that you can meet the demands of the end user and therefore please more customers than ever before.

Our reliable supply of windows, doors and conservatory systems is based on fast lead times, quick turnarounds, high quality, and reliability. Equally convenient, all products are available in a range of styles, and include high performance hardware – as an example, any item that features MACO locks is instantly guaranteed by their Secure Plus Scheme. It is this combination of priorities that has led to our growth and extensive accumulation of pleased customers.

Tools To Help Our Trade Customers Grow

This year, we’re more committed than ever to helping our trade partners grow their businesses. That’s why we’re proud to offer an innovative window designer for those who work with us. This design tool is sure to make a significant difference to your business with 3D imagery and quoting software. Access to this platform is one of the many reasons why you should choose Dempsey Dyer and partner with us to make this year the best year for you and your business.

The Ideal Commercial Partners

Over the years, Dempsey Dyer have won many contracts for large and small commercial organisations, including councils and housing authorities. Our dedicated commercial department are here to work with you throughout every step of your project, from pre-contract meetings and designs, right through to the installation of the products and aftercare advice.

Wide Reaching Trade Suppliers

With such a reliable trade supply, our customer base covers a very wide area. We have customers in every corner of the UK; from Southampton to Cowdenbeath in West Fife, and many others in between. Our strong customer base allows us to provide competitive prices for windows and doors, in timber, uPVC and composite materials. We can also supply our in-house manufactured timber conservatory systems, or incorporate our windows and doors into uPVC systems from reputable external suppliers.

Product Range

A window manufactured by Dempsey Dyer


Here at Dempsey Dyer we manufacture a range of window styles across our uPVC, timber, timber effect and aluminium product range. Benefit from the latest uPVC designs from Deceuninck, various timber species including Accoya, our in-house developed Beaumont timber look range and even the Reynaers aluminium window system.

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A door manufactured by Dempsey Dyer


We also manufacture a wide range of doors across our timber, uPVC, composite and aluminium range. Entrance, bi-fold, patio and French styles are all available with various configurations.

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A conservatory manufactured by Dempsey Dyer


Choose from our in-house manufactured timber frames, or a range of conservatory systems from third party market leaders. Both options use the same high performance ironmongery that is incorporated into our window and door range.

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Dempsey Dyer windows and doors fitted as part of an orangery extension


Create your very own inspirational living space with our range of uPVC and timber orangery solutions. Each can be designed to bespoke requirements and combines large glazed openings with solid brick pillars.

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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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